NOGUCHI Katsuyuki

Faculty Division of Natural Sciences Research Group of Environmental SciencesAssociate Professor
Last Updated :2025/03/18

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Profile Information

  • Name (Japanese)

    Noguchi

  • Name (Kana)

    Katsuyuki

Degree

  • Mar. 2004

Research Interests

  • NO2
  • nitrogen dioxide
  • Earth and Planetary Atmospheric Science
  • 惑星探査
  • 惑星大気
  • 火星大気
  • 金星大気
  • リモートセンシング
  • radio occultation measurement
  • 観測アルゴリズム
  • 人工衛星
  • 大気汚染

Research Areas

  • Natural sciences, Space and planetary science
  • Natural sciences, Atmospheric and hydrospheric science
  • Environmental science/Agricultural science, Environmental dynamics

Research History

  • Apr. 2024 - Present, 宇宙航空研究開発機構宇宙科学研究所, 大学共同利用システム研究員, Japan
  • Apr. 2023 - Present, 奈良女子大学研究院自然科学系准教授（現在）
  • Apr. 2012 - Mar. 2023, 奈良女子大学研究院自然科学系助教, Japan
  • 2013 - 2017, 宇宙航空研究開発機構宇宙科学研究所大学共同利用システム研究員
  • 2007 - 2012, 奈良女子大学理学部助教
  • 2008 - 2010, JSPS Postdoctoral Fellowships for Research Abroad
  • 2007 - 2007, 日本学術振興会特定国派遣研究者（ドイツ・ブレーメン大学、出張扱い）
  • Oct. 2004 - 2007, 奈良女子大学理学部助手
  • Apr. 2004 - Sep. 2004, 宇宙航空研究開発機構宇宙航空プロジェクト研究員

Education

  • 2004, The University of Tokyo, Graduate School of Science, 地球惑星科学専攻博士課程, Japan
  • 2000, The University of Tokyo, Graduate School of Science, 地球惑星物理学専攻修士課程, Japan
  • 1998, The University of Tokyo, The Faculty of Engineering, 精密機械工学科, Japan

Professional Memberships

  • American Geophysical Union
  • 日本リモートセンシング学会
  • 日本惑星科学会
  • 日本気象学会
  • 地球電磁気・地球惑星圏学会
  • 大気化学研究会
  • 日本地球惑星科学連合
  • American Geophysical Union

Academic Activities

  • 第152回地球電磁気・地球惑星圏学会総会および講演会 学生発表賞 審査員, Review, 03 Nov. 2022 - 07 Nov. 2022
  • 第148回地球電磁気・地球惑星圏学会総会および講演会 学生発表賞 審査員, Review, 01 Nov. 2020 - 04 Nov. 2020
  • 第144回地球電磁気・地球惑星圏学会総会および講演会 学生発表賞 審査員, Review, 23 Nov. 2018 - 27 Nov. 2018

■Ⅱ．研究活動実績

Published Papers

  • Not Refereed, 25 Dec. 2023, 32, 4, 313, 315, Scientific journal
  • Refereed, Nature Communications, Springer Science and Business Media LLC, Generation of gravity waves from thermal tides in the Venus atmosphere, Norihiko Sugimoto; Yukiko Fujisawa; Hiroki Kashimura; Katsuyuki Noguchi; Takeshi Kuroda; Masahiro Takagi; Yoshi-Yuki Hayashi, AbstractGravity waves play essential roles in the terrestrial atmosphere because they propagate far from source regions and transport momentum and energy globally. Gravity waves are also observed in the Venus atmosphere, but their characteristics have been poorly understood. Here we demonstrate activities of small-scale gravity waves using a high-resolution Venus general circulation model with less than 20 and 0.25 km in the horizontal and vertical grid intervals, respectively. We find spontaneous gravity wave radiation from nearly balanced flows. In the upper cloud layer (~70 km), the thermal tides in the super-rotation are primary sources of small-scale gravity waves in the low-latitudes. Baroclinic/barotropic waves are also essential sources in the mid- and high-latitudes. The small-scale gravity waves affect the three-dimensional structure of the super-rotation and contribute to material mixing through their breaking processes. They propagate vertically and transport momentum globally, which decelerates the super-rotation in the upper cloud layer (~70 km) and accelerates it above ~80 km., Jun. 2021, 12, 3682, Scientific journal, 10.1038/s41467-021-24002-1
    DOI URLScopus URLScopus Citedby URL
  • Refereed, JAXA Research and Development Report, Profile retrieval of the stratospheric ozone and nitrogen dioxide with spectrometer type balloon-borne optical ozone sensor, MURATA Isao; NOGUCHI Katsuyuki, Jan. 2020, JAXA-RR-19, 002, Research society
  • Refereed, International Journal of Electronics and Applied Research, Electronic Scientists and Engineers Society, Local time, annual, latitude, and seasonal variations of total electron content over Japan, K. I. Oyama; K. Noguchi, 22 Aug. 2019, 06, 02, 87, 97, Scientific journal, 10.33665/ijear.2019.v06i02.002
    URLDOI URL
  • Refereed, Acta Astronautica, Concept of small satellite UV/visible imaging spectrometer optimized for tropospheric NO2 measurements in air quality monitoring, Tamaki Fujinawa; Katsuyuki Noguchi; Akihiko Kuze; Andreas Richter; John P. Burrows; Andreas C. Meier; Tomohiro O. Sato; Takeshi Kuroda; Naohiro Yoshida; Yasko Kasai, © 2019 IAA Satellite observations at nadir can potentially facilitate a better understanding of the emissions and distribution of tropospheric nitrogen dioxide, NO2, which is a well-known pollutant. The identification of emissions requires adequate spatiotemporal resolution measurements of the total column amounts of NO2. The spatial resolution of previous and current observations is insufficient for the identification of NO2 hot-spots. Switching to a spatial resolution of ∼ 1 km × ∼ 1 km can improve the identification of local sources of NO2 and their emissions. To investigate the feasibility of observations with such a high spatial resolution, we simulated radiance spectra for different cases under varying parameters, such as area, season, satellite altitude, and surface reflectance by using the radiative transfer model SCIATRAN. We subsequently retrieved NO2 slant column densities (SCDs)using the differential optical absorption spectroscopy (DOAS)technique with several fit windows. For test cases associated with polluted conditions, we found that the conceptual nadir-observing instrument on a satellite at an altitude of ∼ 300 km involved the lowest retrieval errors for signal-to-noise ratios of around 1000 with accuracy better than the required 5% for tropospheric NO2 SCD and that the fit window of 425–497 nm met the scientific requirements for both surface reflectance cases., Jul. 2019, 160, 421, 432, Scientific journal, 10.1016/j.actaastro.2019.03.081
    DOI URLScopus URLScopus Citedby URL
  • Journal of Geophysical Research: Atmospheres, Blackwell Publishing Ltd, Characteristics of Atmospheric Wave-Induced Laminae Observed by Ozonesondes at the Southern Tip of South America, H. Ohyama; A. Mizuno; F. Zamorano; T. Sugita; H. Akiyoshi; K. Noguchi; E. Wolfram; J. Salvador; G. C. Benitez, Fluctuations of ozone concentrations with dimensions of a few kilometers (i.e., ozone laminae) are frequently found in ozone-sounding profiles. We used ozonesonde measurements made at the southern tip of South America to examine the relationship between ozone laminae and atmospheric waves near the edge of the polar vortex and on the leeward side of the Andes Mountains. Laminar structures are formed by vertical and horizontal displacements of isopleths due to gravity waves and by isentropic advection of vortex air filaments with low ozone concentration due to Rossby wave breaking. We extracted components of these ozone fluctuations by applying a high-pass filter to the observed ozone profiles and normalizing them to background concentrations, which were extracted with a low-pass filter. Ozone fluctuations due to displacements caused by gravity waves were individually evaluated with experimental data. We assumed that the residuals between the observed and gravity wave-induced fluctuations were Rossby waves-induced fluctuations. We found that the gravity wave-induced variability was larger in the upper troposphere than in the lower stratosphere and was a maximum in winter. Rossby wave-induced variability showed a distinct seasonal pattern in the lower stratosphere and accounted for a large portion of the observed variability. We also examined the relationship between gravity wave-induced and Rossby wave-induced ozone variability and the differences in equivalent latitudes between the sonde positions and the polar vortex edge. We found that variability was larger inside than outside the polar vortex., 16 Nov. 2018, 123, 21, 11, 829, Scientific journal, 10.1029/2018JD028707
    DOI URL
  • Refereed, Journal of Geophysical Research: Planets, Local Time Dependence of the Thermal Structure in the Venusian Equatorial Upper Atmosphere: Comparison of Akatsuki Radio Occultation Measurements and GCM Results, Hiroki Ando; Masahiro Takagi; Tetsuya Fukuhara; Takeshi Imamura; Norihiko Sugimoto; Hideo Sagawa; Katsuyuki Noguchi; Silvia Tellmann; Martin Pätzold; Bernd Häusler; Yasuhiro Murata; Hiroshi Takeuchi; Atsushi Yamazaki; Tomoaki Toda; Atsushi Tomiki; Rajkumar Choudhary; Kishore Kumar; Geetha Ramkumar; Maria Antonita, ©2018. American Geophysical Union. All Rights Reserved. Temperature profiles of the Venus atmosphere obtained by the Akatsuki radio occultation measurements showed a prominent local time dependence above 65-km altitude at low latitudes equatorward of 35°. A zonal wavenumber 2 component is predominant in the temperature field, and its phase (i.e., isothermal) surfaces descend with local time, suggesting its downward phase propagation. A general circulation model (GCM) for the Venus atmosphere, AFES-Venus, reproduced the local time-dependent thermal structure qualitatively consistent with the radio occultation measurements. Based on a comparison between the radio occultation measurements and the GCM results, the observed zonal wavenumber 2 structure is attributed to the semidiurnal tide. Applying the dispersion relationship for internal gravity waves to the observed wave structure, the zonally averaged zonal wind speed at 75- to 85-km altitudes was found to be significantly smaller than that at the cloud top. The decrease of the zonal wind speed with altitude is attributed to the momentum deposition by the upwardly propagating semidiurnal tide excited in the cloud layer., Sep. 2018, 123, 9, 2270, 2280, Scientific journal, 10.1029/2018JE005640
    DOI URLScopus URLScopus Citedby URL
  • Refereed, Atmospheric Measurement Techniques, Copernicus GmbH, Vertical profile of tropospheric ozone derived from synergetic retrieval using three different wavelength ranges, UV, IR, and microwave: Sensitivity study for satellite observation, Tomohiro O. Sato; Takao M. Sato; Hideo Sagawa; Katsuyuki Noguchi; Naoko Saitoh; Hitoshi Irie; Kazuyuki Kita; Mona E. Mahani; Koji Zettsu; Ryoichi Imasu; Sachiko Hayashida; Yasuko Kasai, We performed a feasibility study of constraining the vertical profile of the tropospheric ozone by using a synergetic retrieval method on multiple spectra, i.e., ultraviolet (UV), thermal infrared (TIR), and microwave (MW) ranges, measured from space. This work provides, for the first time, a quantitative evaluation of the retrieval sensitivity of the tropospheric ozone by adding the MW measurement to the UV and TIR measurements. Two observation points in East Asia (one in an urban area and one in an ocean area) and two observation times (one during summer and one during winter) were assumed. Geometry of line of sight was nadir down-looking for the UV and TIR measurements, and limb sounding for the MW measurement. The retrieval sensitivities of the ozone profiles in the upper troposphere (UT), middle troposphere (MT), and lowermost troposphere (LMT) were estimated using the degree of freedom for signal (DFS), the pressure of maximum sensitivity, reduction rate of error from the a priori error, and the averaging kernel matrix, derived based on the optimal estimation method. The measurement noise levels were assumed to be the same as those for currently available instruments. The weighting functions for the UV, TIR, and MW ranges were calculated using the SCIATRAN radiative transfer model, the Line-By-Line Radiative Transfer Model (LBLRTM), and the Advanced Model for Atmospheric Terahertz Radiation Analysis and Simulation (AMATERASU), respectively. The DFS value was increased by approximately 96, 23, and 30ĝ ̄% by adding the MW measurements to the combination of UV and TIR measurements in the UT, MT, and LMT regions, respectively. The MW measurement increased the DFS value of the LMT ozone
    nevertheless, the MW measurement alone has no sensitivity to the LMT ozone. The pressure of maximum sensitivity value for the LMT ozone was also increased by adding the MW measurement. These findings indicate that better information on LMT ozone can be obtained by adding constraints on the UT and MT ozone from the MW measurement. The results of this study are applicable to the upcoming air-quality monitoring missions, APOLLO, GMAP-Asia, and uvSCOPE., 26 Mar. 2018, 11, 3, 1653, 1668, Scientific journal, 10.5194/amt-11-1653-2018
    DOI URL
  • Refereed, Earth, Planets and Space, Initial performance of the radio occultation experiment in the Venus orbiter mission Akatsuki Akatsuki at Venus: The First Year of Scientific Operation Masato Nakamura, Dmitri Titov, Kevin McGouldrick, Pierre Drossart, Jean-Loup Bertaux and Huixin Liu 7., Takeshi Imamura; Hiroki Ando; Silvia Tellmann; Martin; Pätzold, Ber; Häusler; Atsushi Yamazaki; Takao M. Sato; Katsuyuki Noguchi; Yoshifumi Futaana; Janusz Oschlisniok; Sanjay Limaye; R. K. Choudhary; Yasuhiro Murata; Hiroshi Takeuchi; Chikako Hirose; Tsutomu Ichikawa; Tomoaki Toda; Atsushi Tomiki; Takumi Abe; Zen Ichi Yamamoto; Hirotomo Noda; Takahiro Iwata; Shin Ya Murakami; Takehiko Satoh; Tetsuya Fukuhara; Kazunori Ogohara; Ko Ichiro Sugiyama; Hiroki Kashimura; Shoko Ohtsuki; Seiko Takagi; Yukio Yamamoto; Naru Hirata; George L. Hashimoto; Manabu Yamada; Makoto Suzuki; Nobuaki Ishii; Tomoko Hayashiyama; Yeon Joo Lee; Masato Nakamura, © 2017 The Author(s). After the arrival of Akatsuki spacecraft of Japan Aerospace Exploration Agency at Venus in December 2015, the radio occultation experiment, termed RS (Radio Science), obtained 19 vertical profiles of the Venusian atmosphere by April 2017. An onboard ultra-stable oscillator is used to generate stable X-band downlink signals needed for the experiment. The quantities to be retrieved are the atmospheric pressure, the temperature, the sulfuric acid vapor mixing ratio, and the electron density. Temperature profiles were successfully obtained down to ~ 38 km altitude and show distinct atmospheric structures depending on the altitude. The overall structure is close to the previous observations, suggesting a remarkable stability of the thermal structure. Local time-dependent features are seen within and above the clouds, which is located around 48-70 km altitude. The H2SO4vapor density roughly follows the saturation curve at cloud heights, suggesting equilibrium with cloud particles. The ionospheric electron density profiles are also successfully retrieved, showing distinct local time dependence. Akatsuki RS mainly probes the low and middle latitude regions thanks to the near-equatorial orbit in contrast to the previous radio occultation experiments using polar orbiters. Studies based on combined analyses of RS and optical imaging data are ongoing.[Figure not available: see fulltext.], 01 Dec. 2017, 69, 1, 10.1186/s40623-017-0722-3
    URLDOI URLScopus Citedby URL
  • Refereed, EARTH PLANETS AND SPACE, SPRINGER HEIDELBERG, Initial performance of the radio occultation experiment in the Venus orbiter mission Akatsuki, Takeshi Imamura; Hiroki Ando; Silvia Tellmann; Martin Paetzold; Bernd Haeusler; Atsushi Yamazaki; Takao M. Sato; Katsuyuki Noguchi; Yoshifumi Futaana; Janusz Oschlisniok; Sanjay Limaye; R. K. Choudhary; Yasuhiro Murata; Hiroshi Takeuchi; Chikako Hirose; Tsutomu Ichikawa; Tomoaki Toda; Atsushi Tomiki; Takumi Abe; Zen-ichi Yamamoto; Hirotomo Noda; Takahiro Iwata; Shin-ya Murakami; Takehiko Satoh; Tetsuya Fukuhara; Kazunori Ogohara; Ko-ichiro Sugiyama; Hiroki Kashimura; Shoko Ohtsuki; Seiko Takagi; Yukio Yamamoto; Naru Hirata; George L. Hashimoto; Manabu Yamada; Makoto Suzuki; Nobuaki Ishii; Tomoko Hayashiyama; Yeon Joo Lee; Masato Nakamura, After the arrival of Akatsuki spacecraft of Japan Aerospace Exploration Agency at Venus in December 2015, the radio occultation experiment, termed RS (Radio Science), obtained 19 vertical profiles of the Venusian atmosphere by April 2017. An onboard ultra-stable oscillator is used to generate stable X-band downlink signals needed for the experiment. The quantities to be retrieved are the atmospheric pressure, the temperature, the sulfuric acid vapor mixing ratio, and the electron density. Temperature profiles were successfully obtained down to similar to 38 km altitude and show distinct atmospheric structures depending on the altitude. The overall structure is close to the previous observations, suggesting a remarkable stability of the thermal structure. Local time-dependent features are seen within and above the clouds, which is located around 48-70 km altitude. The H2SO4 vapor density roughly follows the saturation curve at cloud heights, suggesting equilibrium with cloud particles. The ionospheric electron density profiles are also successfully retrieved, showing distinct local time dependence. Akatsuki RS mainly probes the low and middle latitude regions thanks to the near-equatorial orbit in contrast to the previous radio occultation experiments using polar orbiters. Studies based on combined analyses of RS and optical imaging data are ongoing., Oct. 2017, 69, 69:137, Scientific journal, 10.1186/s40623-017-0722-3
    DOI URL
  • Refereed, PROGRESS IN EARTH AND PLANETARY SCIENCE, SPRINGER, Feasibility of retrieving dust properties and total column water vapor from solar spectra measured using a lander camera on Mars, Naohiro Manago; Katsuyuki Noguchi; George L. Hashimoto; Hiroki Senshu; Naohito Otobe; Makoto Suzuki; Hiroaki Kuze, Dust and water vapor are important constituents in the Martian atmosphere, exerting significant influence on the heat balance of the atmosphere and surface. We have developed a method to retrieve optical and physical properties of Martian dust from spectral intensities of direct and scattered solar radiation to be measured using a multi-wavelength environmental camera onboard a Mars lander. Martian dust is assumed to be composed of silicate-like substrate and hematite-like inclusion, having spheroidal shape with a monomodal gamma size distribution. Error analysis based on simulated data reveals that appropriate combinations of three bands centered at 450, 550, and 675 nm wavelengths and 4 scattering angles of 3 degrees, 10 degrees, 50 degrees, and 120 degrees lead to good retrieval of four dust parameters, namely, aerosol optical depth, effective radius and variance of size distribution, and volume mixing ratio of hematite. Retrieval error increases when some of the observational parameters such as color ratio or aureole are omitted from the retrieval. Also, the capability of retrieving total column water vapor is examined through observations of direct and scattered solar radiation intensities at 925, 935, and 972 nm. The simulation and error analysis presented here will be useful for designing an environmental camera that can elucidate the dust and water vapor properties in a future Mars lander mission., Jun. 2017, 4, 4:16, Scientific journal, 10.1186/s40645-017-0131-z
    DOI URL
  • Refereed, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, AMER GEOPHYSICAL UNION, Role of stationary and transient waves in CO2 supersaturation during northern winter in the Martian atmosphere revealed by MGS radio occultation measurements, K. Noguchi; Y. Morii; N. Oda; T. Kuroda; S. Tellmann; M. Paetzold, The Martian atmosphere, which mainly consists of carbon dioxide (CO2), is characterized by extremely low temperatures that cause CO2 gas to freeze and dry ice to form. To date, temperatures below the CO2 saturation temperature, which can be attributed to the effects of atmospheric waves, have been observed in the polar winter and in the mesosphere. Using data from Mars Global Surveyor (MGS) radio occultation measurements, we investigated the role of large-scale atmospheric waves including stationary and transient waves at northern high latitudes in winter on CO2 supersaturation. A distinct longitudinal dependence of CO2 supersaturation was observed at altitudes higher than the pressure level of 200-400Pa, where a stationary wave with a wave number of 2, whose temperature amplitude had minima at 30-100Pa, lowered the background temperature to a level close to the CO2 saturation temperature. However, the stationary wave alone was not sufficient to cause CO2 supersaturation. Additional temperature disturbances caused by transient waves, namely, superposition of both waves, had a significant role in CO2 supersaturation. The longitudinal dependence of the occurrence of CO2 supersaturation revealed by our study might affect the longitudinal distribution of CO2 snowfall and the formation of the seasonal polar ice cap., May 2017, 122, 5, 912, 926, Scientific journal, 10.1002/2016JE005142
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  • Refereed, Journal of Space Science Informatics Japan, Conversion of the MRO/MCS data into netCDF format and gridding of them for analysis and visualization by the use of GrADS, NOGUCHI Katsuyuki; Katsuyuki Noguchi; Hiroo Hayashi, 2017, 6, 109, 116, 10.20637/JAXA-RR-16-007/0010
    DOI URL
  • Not Refereed, 2017, 157, 160
  • Not Refereed, 2016, 5, 123, 131
  • Not Refereed, Journal of Space Science Informatics Japan, A method of visualization of three-dimensional data by "gnuplot", NOGUCHI Katsuyuki, 2016, 5, 123, 131
  • Not Refereed, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, AMER GEOPHYSICAL UNION, Estimation of changes in the composition of the Martian atmosphere caused by CO2 condensation from GRS Ar measurements and its application to the rederivation of MGS radio occultation measurements, K. Noguchi; S. Ikeda; T. Kuroda; S. Tellmann; M. Paetzold, We propose a method to estimate seasonal changes in the composition of the Martian atmosphere, which is influenced by CO2 condensation due to the polar nights at southern high latitudes. The method relies on measurements of the Ar concentration obtained by the Gamma Ray Spectrometer (GRS) onboard Mars Odyssey. We assume that the Martian atmosphere is composed of CO2, N-2, and Ar, and is vertically well mixed. Since N-2 and Ar do not condense even during the polar nights, the ratio of N-2 and Ar remains constant, and the concentrations of N-2 and CO2 can be estimated from Ar measurements. Estimates of the atmospheric composition were utilized for the rederivation of temperature and pressure profiles in the Mars Global Surveyor (MGS) radio occultation measurements (approximate to 70 profiles of approximate to 20,000 profiles in the whole data set) at southern polar latitudes (90 degrees S-75 degrees S) during the autumn, winter, and spring seasons (Ls = 0 degrees-240 degrees). The rederived profiles indicated that use of the standard global composition overestimated the temperature by at least approximately 5 K at Ls = approximate to 120 degrees (midwinter), when the largest CO2 depletion occurred and the CO2 volume mixing ratio fell to 78%. The occurrence and degree of CO2 supersaturation were several times higher and larger, respectively, in the rederived temperature profiles than in the original MGS profiles. This suggests that consideration of CO2 depletion during southern polar nights is needed when studying CO2 supersaturation using radio occultation profiles., Dec. 2014, 119, 12, 2510, 2521, Scientific journal, 10.1002/2014JE004629
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  • Not Refereed, ATMOSPHERIC MEASUREMENT TECHNIQUES, COPERNICUS GESELLSCHAFT MBH, Effect of surface BRDF of various land cover types on geostationary observations of tropospheric NO2, K. Noguchi; A. Richter; V. Rozanov; A. Rozanov; J. P. Burrows; H. Irie; K. Kita, We investigated the effect of surface reflectance anisotropy, bidirectional reflectance distribution function (BRDF), on satellite retrievals of tropospheric NO2. We assume the geometry of geostationary measurements over Tokyo, which is one of the worst air-polluted regions in East Asia. We calculated air mass factors (AMF) and box AMFs (BAMF) for tropospheric NO2 to evaluate the effect of BRDF by using the radiative transfer model SCIATRAN. To model the BRDF effect, we utilized the Moderate Resolution Imaging Spectroradiometer (MODIS) products (MOD43B1 and MOD43B2), which provide three coefficients to express the RossThick-LiSparse reciprocal model, a semi-empirical and kernel-based model of BRDF. Because BRDF depends on the land cover type, we also utilized the High Resolution Land-Use and Land-Cover Map of the Advanced Land Observing Satellite (ALOS)/Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2), which classifies the ground pixels over Tokyo into six main types: water, urban, paddy, crop, deciduous forest, and evergreen forest. We first develop an empirical model of the three BRDF coefficients for each land cover type over Tokyo and then apply the model to the calculation of land-cover-type-dependent AMFs and BAMFs. Results show that the variability of AMF among the land types is up to several tens of percent, and if we neglect the reflectance anisotropy, the difference with AMFs based on BRDF reaches 10% or more. The evaluation of the BAMFs calculated shows that not considering BRDF will cause large errors if the concentration of NO2 is high close to the surface, although the importance of BRDF for AMFs decreases for large aerosol optical depth (AOD)., 2014, 7, 10, 3497, 3508, Scientific journal, 10.5194/amt-7-3497-2014
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  • Not Refereed, ADVANCES IN SPACE RESEARCH, ELSEVIER SCI LTD, Quantifying the relationship between the measurement precision and specifications of a UV/visible sensor on a geostationary satellite, Hitoshi Irie; Hironobu Iwabuchi; Katsuyuki Noguchi; Yasuko Kasai; Kazuyuki Kita; Hajime Akimoto, To investigate the feasibility of new satellite observations, including air quality (AQ) observations from geostationary (GEO) orbit, it is essential to link the measurement precision (epsilon) with sensor specifications in advance. The present study attempts to formulate the linkage between E and specifications of a UV/visible sensor (signal-to-noise ratio (SNR), full width at half maximum (FWHM) of the slit function, and sampling ratio (SR)) on a GEO satellite. A sophisticated radiative transfer model (JACOSPAR) is used to calculate synthetic radiance spectra that would be measured by a UV/visible sensor observing the atmosphere over Tokyo (35.7 degrees N, 139.7 degrees E) from GEO orbit at 120 degrees E longitude. The spectra, modified according to given sensor specifications, are analyzed by the differential optical absorption spectroscopy technique to estimate the E for slant column densities of O-3 and NO2. We find clear relationships: for example, the e of the O-3 slant column density (molecules cm(-2)) and SNR at 330 nm are linked by the equation log(epsilon) = -1.06 . log(SNR) + 20.71 in the UV region, and the epsilon of the NO2 slant column density and SNR at 450 nm are linked by log(epsilon) = -0.98 . log(SNR) + 18.00, at a FWHM = 0.6 nm (for the Gaussian slit function) and SR = 4. The relationships are mostly independent of other specifications (e.g., horizontal and temporal resolutions), as they affect E primarily through SNR, providing constraints in determining the optimal SNR (and alternatively FWHM and SR) for similar UV/visible sensors dedicated for AQ studies., Jun. 2012, 49, 12, 1743, 1749, Scientific journal, 10.1016/j.asr.2012.03.012
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  • Not Refereed, LAND SURFACE REMOTE SENSING, SPIE-INT SOC OPTICAL ENGINEERING, A study of BRDF over Tokyo for the spaceborne measurements of atmospheric trace gases, K. Noguchi; A. Richter; J. P. Burrows; H. Irie; K. Kita, In the present study, we aim at developing an empirical model of BRDF over Tokyo, Japan, which is one of the most polluted areas in Asia, to evaluate the effect of the surface albedo on air-pollution monitoring from space. We used the RossThick-LiSparseReciprocal model with MODIS data to retrieve BRDF information. The BRDF had a strong dependence on season and local time, and the magnitude of the seasonal and local time change was up to 50%., 2012, 8524, International conference proceedings, 10.1117/12.974818
    DOI URL
  • Not Refereed, ADVANCES IN SPACE RESEARCH, ELSEVIER SCI LTD, A feasibility study for the detection of the diurnal variation of tropospheric NO2 over Tokyo from a geostationary orbit, Katsuyuki Noguchi; Andreas Richter; Heinrich Bovensmann; Andreas Hilboll; John P. Burrows; Hitoshi Irie; Sachiko Hayashida; Yu Morino, We have conducted a feasibility study for the geostationary monitoring of the diurnal variation of tropospheric NO2 over Tokyo. Using NO2 fields from a chemical transport model, synthetic spectra were created by a radiative transfer model, SCIATRAN, for summer and winter cases. We then performed a Differential Optical Absorption Spectroscopy (DOAS) analysis to retrieve NO2 slant column densities (SCDs), and after converting SCDs into vertical column densities (VCDs), we estimated the precision of the retrieved VCDs. The simulation showed that signal-to-noise ratio (SNR) >= 500 is needed to detect the diurnal variation and that SNR >= 1000 is needed to observe the local minimum occurring in the early afternoon (LT13-14) in summer. In winter, the detection of the diurnal variation during LT08-15 needs SNR >= 500, and SNR >= 1000 is needed if early morning (LT07) and early evening (LT16) are included. The currently discussed sensor specification for the Japanese geostationary satellite project, GMAP-Asia, which has a horizontal resolution of 10 km and a temporal resolution of 1hr, has demonstrated the performance of a precision of several percent, which is approximately corresponding to SNR = 1000-2000 during daytime and SNR >= 500 in the morning and evening. We also discuss possible biases caused by the temperature dependence of the absorption cross section utilized in the DOAS retrieval, and the effect of uncertainties of surface albedo and clouds on the estimation of precisions. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved., Nov. 2011, 48, 9, 1551, 1564, Scientific journal, 10.1016/j.asr.2011.06.029
    DOI URL
  • Not Refereed, ASTRONOMY REPORTS, MAIK NAUKA/INTERPERIODICA/SPRINGER, Properties of solar wind turbulence from radio occultation experiments with the NOZOMI spacecraft, A. I. Efimov; T. Imamura; K. -I. Oyama; K. Noguchi; L. N. Samoznaev; A. S. Nabatov; M. K. Bird; I. V. Chashei, Radio-sounding experiments using signals from the Japanese NOZOMI spacecraft to probe the circum solar plasma were performed from December 2000 through January 2001. They can be used to obtain information about the properties of the solar wind plasma in the region where it is accelerated at heliocentric distances of 12.8-36.9R (s) (where R (s) is the radius of the Sun). Measurements of the intensity and frequency of the received signals were carried out with high time resolution (similar to 0.05 s for the frequency and similar to 0.0064 s for the intensity), making it possible to investigate the anisotropy of inhomogeneities and the spatial spectrum of the turbulence of the circum solar plasma. Analysis of these radio-sounding data has shown that the scintillation index and intensity of the frequency fluctuations decrease approximately according to a power law with increasing distance of the line of sight from the Sun. Measurements of the amplitude fluctuations and estimates of the solar wind velocity derived from spatially separated observations indicate the presence of small-scale inhomogeneities with sizes of the order of 50 km at heliocentric distances less than 25R (s) , which are elongated in the radial direction with anisotropy coefficients from 2.3 to 3.0. The inhomogeneities at heliocentric distances exceeding 30R (s) become close to isotropic., Nov. 2010, 54, 11, 1032, 1041, Scientific journal, 10.1134/S1063772910110089
    DOI URL
  • Refereed, Astronomy Reports, Properties of the turbulence of the solar wind from radio-eclipse experiments with the NOZOMI spacecraft, Efimov, I; T. Imamura; K.-I. Oyama; K. Noguchi; L. N. Samoznaev; A. S. Nabatov; M. K. Bird; I. V. Chashei, 2010, 54, 1031, 1041, Scientific journal
  • Not Refereed, 日本リモートセンシング学会誌, The Remote Sensing Society of Japan, Comparison of tropospheric NO2 observations by GOME and the air-quality monitoring network around Tokyo, Japan, NOGUCHI Katsuyuki; K. Noguchi; H. Itoh; T. Shibasaki; S. Hayashida; I. Uno; T. Ohara; A. Richter; J. P. Burrows, We compared satellite and ground-based observations of tropospheric NO2 to test whether satellite observations could successfully detect the behavior of tropospheric NO2. The satellite data were tropospheric NO2 vertical column density (VCD) derived from Global Ozone Monitoring Experiment (GOME) spectrometer measurements (hereafter GOME-NO2), and the ground-based data were surface NO2 volume mixing ratio (VMR) observed by the network of air-quality monitoring stations in Japan. The analysis was performed in the Tokyo region (the Kanto Plain) from January 1996 to June 2003. A strong correlation between GOME-NO2 and the surface VMR was observed, with the two quantities showing similar seasonal variation of maximum in winter, minimum in summer. This provided initial evidence that GOME was successful in observing the behavior of NO2 near the surface level in the Tokyo region. We performed a more rigorous comparison in which the surface NO2 VMR was scaled to the tropospheric VCD using vertical NO2 VMR profiles, which were calculated using the chemical transport model CMAQ/REAS. This second comparison indicated that the GOME observations represent the behavior of NO2 more closely at the relatively unpolluted stations than at the highly polluted stations in the network of air-quality monitoring. This tendency was thought to result from the horizontal heterogeneity within a GOME footprint. Comparison with a previous study in northern Italy showed that the GOME-NO2 measurements over Tokyo tended to be smaller than those over northern Italy. Because Tokyo is located in a coastal land region with a gulf, areas of ocean intruding into the GOME pixels could lower the observed GOME-NO2. The pollution in Tokyo is so spatially concentrated that the rural regions contaminating GOME pixels could also reduce the observed NO2 concentration from its true spatially resolved value., 2009, 29, 2, 398, 409, 10.11440/rssj.29.398
    DOI URL
  • Not Refereed, On Global Methane Observation from Space by SCIAMACHY, ARIYAMA Yuko; ETOH Satomi; NOGUCHI Katsuyuki; HAYASHIDA Sachiko, 2009, 56, 8, 603, 611
  • Not Refereed, Tenki, On Global Methane Observation from Space by SCIAMACHY, NOGUCHI Katsuyuki; Ariyama, Y; S. Etoh; K. Noguchi; S. Hayashida, 2009, 56, 8, 603, 611
  • Not Refereed, SOLA, METEOROLOGICAL SOC JAPAN, Spatiotemporal Variation in Tropospheric Column Ozone over East Asia Observed by GOME and Ozonesondes, S. Hayashida; N. Urita; K. Noguchi; X. Liu; K. Chance, We analyzed tropospheric column ozone (TCO) observed by the GOME-1 (Global Ozone Monitoring Experiment; European Space Agency, 1995) and ozonesondes to determine the spatiotemporal variation in TCO over East Asia from 1996 to 2003. An enhanced TCO belt (E-TCO belt) was observed at approximately 35 degrees N throughout the year. The E-TCO belt moved northward from winter to summer and southward from summer to winter, strongly suggesting connection with the seasonal variation of meteorological conditions. The large enhancement of TCO found over central China in summer suggests that there is significant outflow of ozone from that region. This study presents the first satellite-derived comprehensive picture of the TCO spatiotemporal variation over East Asia, which has not been obtained from limited ground-based measurements., 2008, 4, 117, 120, Scientific journal, 10.2151/sola.2008-030
    DOI URL
  • Refereed, HIGH-PERFORMANCE COMPUTING, SPRINGER-VERLAG BERLIN, Development of an interactive visual data mining system for atmospheric science, Chiemi Watanabe; Eriko Touma; Kazuko Yamauchi; Katsuyuki Noguchi; Sachiko Hayashida; Kazuki Joe, In atmospheric science, 3D visualization techniques have been mainly used to create impressive presentation in recent decades. However, from the viewpoint of utilize for visual data mining, 3D visualization methodology has difficulties in becoming wide spread because most conventional and established way is to make 2D diagrams consisting of two dimensions of a temporal transitional 3D grid. From these observations, we have been developing a quick look tool of atmospheric science data for 3d visual data mining. We expect that scientists can utilize this tool for finding out 2D diagrams from the data by using various 2D or 3D visualization methods, and become accustomed themselves to 3D visualization methods., 2008, 4759, 279, +, International conference proceedings
  • Not Refereed, SOLA, METEOROLOGICAL SOC JPN, Validation and Comparison of Tropospheric Column Ozone Derived from GOME Measurements with Ozonesondes over Japan, Katsuyuki Noguchi; Naomi Urita; Sachiko Hayashida; Xiong Liu; Kelly Chance, Tropospheric column ozone derived from Global Ozone Monitoring Experiment (GOME) measurements (GOME-O(3)) was validated using operational ozonesonde measurements over Japan and compared with Tropospheric Ozone Residual (TOR) derived from Total Ozone Mapping Spectrometer and Solar Backscatter Ultraviolet measurements. The GOME-O(3) validation showed positive biases with a magnitude of less than 3 DU (similar to 10%) and random errors of 5-9 DU (similar to 15-30%) at collocated sonde stations. GOME-O(3) showed better agreement with ozonesonde measurements over Japan than TOR did. The direct comparison between GOME-O(3) and TOR showed the underestimation of TOR during winter and spring in the southern part of Japan (around 30 degrees N)., 2007, 3, 41, 44, Scientific journal, 10.2151/sola.2007-011
    DOI URL
  • Not Refereed, ATMOSPHERIC CHEMISTRY AND PHYSICS, COPERNICUS GESELLSCHAFT MBH, Systematic analysis of interannual and seasonal variations of model-simulated tropospheric NO2 in Asia and comparison with GOME-satellite data, I. Uno; Y. He; T. Ohara; K. Yamaji; J. -I. Kurokawa; M. Katayama; Z. Wang; K. Noguchi; S. Hayashida; A. Richter; J. P. Burrows, Systematic analyses of interannual and seasonal variations of tropospheric NO2 vertical column densities (VCDs) based on GOME satellite data and the regional scale chemical transport model (CTM), Community Multi-scale Air Quality (CMAQ), are presented for the atmosphere over eastern Asia between 1996 and June 2003. A newly developed year-by-year emission inventory (REAS) was used in CMAQ. The horizontal distribution of annual averaged GOME NO2 VCDs generally agrees well with the CMAQ results. However, CMAQ/REAS results underestimate the GOME retrievals with factors of 2-4 over polluted industrial regions such as Central East China (CEC), a major part of Korea, Hong Kong, and central and western Japan. The most probable reasons for the underestimation typically over the CEC are accuracy of the basic energy statistic data, emission factors, and socio-economic data used for construction of emission inventory. For the Japan region, GOME and CMAQ NO2 data show reasonable agreement with respect to interannual variation and show no clear increasing trend. For CEC, GOME and CMAQ NO2 data indicate a very rapid increasing trend from 2000. Analyses of the seasonal cycle of NO2 VCDs show that GOME data have larger dips than CMAQ NO2 during February-April and September-November. Sensitivity experiments with fixed emission intensity reveal that the detection of emission trends from satellite in fall or winter has a larger error caused by the variability of meteorology. Examination during summer time and annual averaged NO2 VCDs are robust with respect to variability of meteorology and are therefore more suitable for analyses of emission trends. Analysis of recent trends of annual emissions in China shows that the increasing trends of 1996-1998 and 2000-2002 for GOME and CMAQ/REAS show good agreement, but the rate of increase by GOME is approximately 10-11% yr(-1) after 2000; it is slightly steeper than CMAQ/REAS (8-9% yr(-1)). The greatest difference was apparent between the years 1998 and 2000: CMAQ/REAS only shows a few percentage points of increase, whereas GOME gives a greater than 8% yr(-1) increase. The exact reason remains unclear, but the most likely explanation is that the emission trend based on the Chinese emission related statistics underestimates the rapid growth of emissions., 2007, 7, 6, 1671, 1681, Scientific journal
  • Refereed, Journal of Geophysical Research Atmospheres, Blackwell Publishing Ltd, A global statistical study on the origin of small-scale ozone vertical structures in the lower stratosphere, K. Noguchi; T. Imamura; K. I. Oyama; G. E. Bodeker, We investigated meridional and seasonal variations in small-vertical-scale (wavelengths 0.5-3 km) fluctuations of the ozone mixing ratio in the lower stratosphere using ozonesonde data covering wide longitudinal and latitudinal regions in all seasons. The generation of mixing ratio fluctuation is attributed to vertical advection and/or horizontal advection
    the former was estimated from the potential temperature fluctuation and the vertical gradient of background mixing ratio, while the latter was obtained by subtracting the vertical advection component from the observed value. The results show that horizontal advection is always the major source of the mixing ratio fluctuation above the potential temperature of 700 K (∼27 km altitude). Below 700 K, the source of the mixing ratio fluctuation depends on latitude
    horizontal advection governs the mixing ratio fluctuations at high latitudes, vertical advection dominates at low latitudes, and horizontal advection is relatively dominant in winter-spring, while vertical advection is dominant in summer-autumn in the midlatitudes. These tendencies were confirmed by analyzing the correlation between the small-scale structures of the mixing ratio and the potential temperature. The synthetic distribution of the horizontal advection activity due to synoptic-scale motions calculated from assimilated meteorological data reproduced the seasonal, meridional, and altitudinal tendencies of the observed small-scale fluctuations, suggesting the major contribution of differential advection via large-scale winds. Copyright 2006 by the American Geophysical Union., 16 Dec. 2006, 111, 23, Scientific journal, 10.1029/2006JD007232
    DOI URL
  • Not Refereed, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, AMER GEOPHYSICAL UNION, A global statistical study on the origin of small-scale ozone vertical structures in the lower stratosphere, K. Noguchi; T. Imamura; K. -I. Oyama; G. E. Bodeker, [1] We investigated meridional and seasonal variations in small-vertical-scale (wavelengths 0.5 - 3 km) fluctuations of the ozone mixing ratio in the lower stratosphere using ozonesonde data covering wide longitudinal and latitudinal regions in all seasons. The generation of mixing ratio fluctuation is attributed to vertical advection and/or horizontal advection; the former was estimated from the potential temperature fluctuation and the vertical gradient of background mixing ratio, while the latter was obtained by subtracting the vertical advection component from the observed value. The results show that horizontal advection is always the major source of the mixing ratio fluctuation above the potential temperature of 700 K ( similar to 27 km altitude). Below 700 K, the source of the mixing ratio fluctuation depends on latitude; horizontal advection governs the mixing ratio fluctuations at high latitudes, vertical advection dominates at low latitudes, and horizontal advection is relatively dominant in winter - spring, while vertical advection is dominant in summer - autumn in the midlatitudes. These tendencies were confirmed by analyzing the correlation between the small-scale structures of the mixing ratio and the potential temperature. The synthetic distribution of the horizontal advection activity due to synoptic-scale motions calculated from assimilated meteorological data reproduced the seasonal, meridional, and altitudinal tendencies of the observed small-scale fluctuations, suggesting the major contribution of differential advection via large-scale winds., Dec. 2006, 111, D23, D23105, doi:10.1029/2006JD007232, Scientific journal, 10.1029/2006JD007232
    DOI URL
  • Not Refereed, ASTRONOMY & ASTROPHYSICS, EDP SCIENCES S A, Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft, T Imamura; K Noguchi; A Nabatov; KI Oyama; Z Yamamoto; M Tokumaru, Radio occultation observations of the solar corona at solar offset distances of 12.8-36.9 R-S were performed from December of 2000 to January of 2001, using the Nozomi spacecraft (Planet-B) of Japan. Phase scintillation spectra up to the frequency of similar to 10 Hz were obtained in two-way mode with S-band uplink and X-band downlink. The spectra cannot be represented by a single power law especially for small offset distances. That is, at low frequencies (large scales) the spectra show slopes indicative of Kolmogorov, a local flattening occurs from similar to 0.5 Hz (scale similar to 600 km) to similar to 3 Hz (similar to 100 km), and a steepening occurs again at higher frequencies. This three-component nature of the spectrum was observed with a single method for the first time, although the spectral shape is variable and the three-component feature is not always evident., Sep. 2005, 439, 3, 1165, 1169, Scientific journal, 10.1051/0004-6361:20042614
    DOI URL
  • Not Refereed, MOON: SCIENCE, EXPLORATION AND UTILISATION, PERGAMON-ELSEVIER SCIENCE LTD, Detectability of lunar plasma clouds from SELENE radio occultations, AS Nabatov; T Imamura; NA Savich; KI Oyama; K Noguchi, The SELENE mission includes a dual frequency S- and X-band occultation experiment for the exploration of plasma clouds above the lunar surface. The accuracy of the measurement is mainly limited by the influence of the turbulent media of the Earth's ionosphere and the solar wind plasma. The mission scenario will make accessible only the region along the lunar limb. Still, the radio communication system of the SELENE mission, which consists of three orbiters, is able to provide other occultation configuration. The proposed types of radio occultation will allow exclusion of the effect of the Earth's ionosphere and the solar wind plasma and occultation on both sides of the Moon. The sensitivity is expected to be better than 10(14) el/m(2). The occultation measurement together with the other SELENE mission experiments can present new information on the existence and the origin of the plasma clouds and the interaction of the solar wind with magnetic field anomalies on the surface of the Moon. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved., 2003, 31, 11, 2369, 2375, Scientific journal, 10.1016/S0273-1177(03)00548-9
    DOI URL
  • Not Refereed, RADIO SCIENCE, AMER GEOPHYSICAL UNION, Application of the GPS network to estimate the effect of the terrestrial ionosphere on the radio occultation measurements of planetary ionospheres (vol 36, pg 1607, 2001), K Noguchi; T Imamura; KI Oyama; A Saito, Dec. 2002, 37, 6, 10.1029/2002RS002799
    DOI URL
  • Not Refereed, LUNAR EXPLORATION 2000, PERGAMON-ELSEVIER SCIENCE LTD, Cislunar plasma exploration with the SELENE radio science system, KI Oyama; AS Nabatov; NA Savich; T Imamura; Z Yamamoto; K Noguchi, The SELENE Project of Japan includes three spacecraft: a main orbiting, satellite and two subsatellites. Among many scientific objectives of the Project is the exploration of plasma formations above the lunar surface. The thin plasma layer above the area of the Moon, presented to the Sun, was first detected in radio occultation experiments conducted during 1972 with the Soviet lunar satellite "Luna-19". The SELENE Project radio science experiment will be realized by means of a dual S- and X- band transmitter installed onboard the orbiter and Earth based antennas. The effect of the thin plasma layer near the Luna can be hidden by the fluctuations of the total electron content of the Earth's ionosphere. Dual spacecraft occultation configurations can remove partially the influence of the Earth's ionosphere. Several dual spacecraft configurations are discussed and upper error limits of total electron content measurements are estimated. (C) 2002 COSPAR. Published-by Elsevier Science Ltd. All rights reserved., 2002, 30, 8, 1915, 1919, Scientific journal, 10.1016/S0273-1177(02)00488-X
    DOI URL
  • Not Refereed, Radio Science Bulletin, Radio occultation projects in space programs of Japan, NOGUCHI Katsuyuki; Noguchi, K; T. Imamura; K.-I. Oyama; A. S. Nabatov, 2002, 303, 27, 31
  • Not Refereed, RADIO SCIENCE, AMER GEOPHYSICAL UNION, Application of the GPS network to estimate the effect of the terrestrial ionosphere on the radio occultation measurements of planetary ionospheres, K Noguchi; T Imamura; KI Oyama; A Saito, A feasibility study to observe the low-density Martian nightside ionosphere and the cislunar electron layer by radio occultation technique is presented. Since the total electron contents (TECs) along the ray paths of radio occultation in the ionospheres of Mars and the Moon are comparable to the fluctuation of the TEC of the terrestrial ionosphere, the distortions of radio occultation data by the terrestrial ionosphere should be taken into account. Local time and seasonal dependences of the terrestrial TEC fluctuations are investigated using the GPS receiver network, showing that the terrestrial ionosphere is calm at night in winter and that this period is suitable for the radio occultation measurements of the planetary ionospheres. A method is also developed to estimate the terrestrial TEC fluctuation along the ray path of radio occultation from GPS TEC data., Nov. 2001, 36, 6, 1607, 1613, Scientific journal, 10.1029/2000RS002591
    DOI URL
  • Not Refereed, PLANETARY IONOSPHERES, ELSEVIER SCIENCE BV, First test of the NOZOMI Radio Science System in actual space flight, KI Oyama; AS Nabatov; NA Savich; Z Yamamoto; T Imamura; T Ichikawa; K Noguchi, The Japanese NOZOMI spacecraft (S/C) launched on the 4(th) of July, 1998 was equipped with a coherent dual frequency Radio Science System (RSS) to explore the Martian atmosphere and the solar wind plasma by the radio sounding method. Several communication operations were performed in order to test and calibrate the RSS during the cruise phase of the flight to Mars. S- and X- band signals emitted by the S/C were received and recorded at the Usuda tracking station (Japan). Analysis of the data processing results revealed the influence of the S/C spin on all signal parameters. In particular the S/C spin shifted the frequencies of both the S- and X- band signals, destroying their coherency. It was shown that the effect of the spin stabilizing system can be removed from the final occultation results and the Nozomi S/C can be successfully used in radio occultation experiments. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved., 2001, 27, 11, 1847, 1850, Scientific journal, 10.1016/S0273-1177(01)00307-6
    DOI URL
  • Not Refereed, Journal of the Society of Instrument and Control Engineers, Efficiency of a Group Consisted of Robots with Heterogeneous Motion Algorithms, NOGUCHI Katsuyuki; Kurabayashi, D; J. Ota; T. Arai; K. Noguchi, 1999, 35, 11, 1377, 1384, 10.9746/sicetr1965.35.1377

MISC

  • 2021, 120
  • Not Refereed, 平成29年度大気球シンポジウム集録, スペクトル取得型光学オゾンゾンデ観測からの成層圏オゾン、二酸化窒素高度分布導出, 村田 功; 野口 克行; dreas Richter; Alexei Rozanov; John; P. Burrows, 筆頭, Nov. 2017, isas17-sbs-005, Introduction research institution
    Permalink
  • Not Refereed, 第23回大気化学討論会講演要旨集, スペクトル取得型光学オゾンゾンデによる成層圏オゾン、二酸化窒素の観測, 村田 功; 野口 克行; dreas Richter; Alexei Rozanov; John; P. Burrows, 筆頭, Oct. 2017, 38, 38, Introduction research institution
  • Dec. 2016
    URL
  • Dec. 2016
    URL
  • Not Refereed, 2015, 24, 3, 292, 293, Meeting report
  • Proceedings of the ISAS Lunar and Planetary Symposium, Institute of Space and Astronautical Science, JAXA ; [2006]-, Meteorological Observations with a Navigation Camera onboard the MELOS1 Rover, 05 Aug. 2014, 46, 20p
    URL
  • 2014, 106, 136, 136
  • Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, The Japanese Society for Planetary Sciences, P1-24 Retrievals of temperature and pressure of the Martian atmosphere by the MGS radio occultation measurements considering mixing ratio changes, 20 Nov. 2013, 2013, "P1, 24"
  • Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, The Japanese Society for Planetary Sciences, P1-14 CO2 supersaturation observed in the Martian atmosphere with the MGS radio occupation measurements, 24 Oct. 2012, 2012, 109, 109
  • 2012, 102, 64, 64
  • 2008, 94, 367, 367
  • 2008, 94, 117, 117
  • 2008, 94, 116, 116
  • 2007, 92, 459, 459
  • 2007, 92, 366, 366
  • 2007, 92, 363, 363
  • 2007, 92, 306, 306
  • 2006, 90, 266, 266
  • 2006, 90, 356, 356
  • 2005, 88, 450, 450
  • 2005, 88, 354, 354
  • Not Refereed, 2005, 13, 4, 6, Introduction other
  • 2004, 86, 213, 213
  • 2004, 85, 466, 466
  • 2004, 85, 171, 171
  • Not Refereed, ISAS Research Note, Climatology and origin of small-scale vertical structures in stratospheric ozone, NOGUCHI Katsuyuki, 2004, 775, Report research institution
  • 09 Oct. 2002, 82, 446, 446
  • May 2002, 81, 329, 329
  • 19 Nov. 2001, 2, 471, 474
  • 19 Nov. 2001, 2, 467, 470
  • 10 Oct. 2001, 80, 289, 289
  • Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, The Japanese Society for Planetary Sciences, S12 Radio occultation measurements in Venus atmosphere mission, In the Venus orbiter mission Planet-C, radio occupation technique will be used to obtain vertical profiles of temperature and H_2SO_4 vapor with high vertical resolution. Such information is complementary to the global data of clouds and trace gases obtained by imaging observations., 06 Oct. 2001, 2001, 24, 24
  • 08 May 2001, 79, 307, 307
  • Not Refereed, The Institute of Space and Astronautical Science Report, Japan Aerospace Exploration Agency, A Feasibility Study for Observing Small Lunar and Martian Ionospheres by Radio Occultation Technique, NOGUCHI Katsuyuki; Noguchi, K; T. Imamura; K.-I. Oyama, The fluctuation of the terrestrial ionosphere, which is a serious error source when we try to obtain the information on planetary ionospheres by the radio occultation measurement, is focused on in this study. We are preparing for the radio occultation measurements of the Martian atmosphere and the lunar ionosphere by using the spacecrafts Nozomi and Selene, respectively. By using the radio occultation method, we can measure the electron densities in planetary ionospheres. The phase of the radio wave transmitted from the spacecraft to the Earth is per-turbed when the radio wave passes through the planetary ionosphere. The electron density profile can be derived from the phase perturbation.The inforrnation on the nightside ionosphere of Mars is based on the observations by the Mars 4 and 5 and the Viking orbiter. The detection of the lunar ionosphere by radio occultation technique was reported in the Luna 22 mission. Since the phase shift caused by the fluctuation of the terrestrial ionosphere is comparable to those by the Martian nightside ionosphere and the lunar ionosphere, the detection of these ionospheres is difficult in general. The fluctuation of the terrestrial Total Electron Content (TEC) along the ray path between the spacecraft and the receiv-ing station is estimated from two coherent signals transmitted from several Global Positioning System (GPS) satel-lites. We can obtain the TEC information over Japan from the GPS network of the Geographical Survey Institute (GSI) in Japan, GPS Earth Observation Network (GEONET). The possibility of the detection of the Martian nightside ionosphere and the lunar ionosphere at each local time is investigated for the summer and winter cases by using the TEC data obtained by the GPS network. The result indi-cates that the Martian nightside ionosphere and the lunar ionosphere can be measured if we choose suitable condi-tions of the terrestrial ionosphere for the measurement and monitor the fluctuation of the terrestrial ionosphere along the ray path of the radio occultation by using the GPS network. There are several ways to estimate the TEC fluctuation of the terrestrial ionosphere by using the GPS network. In general, it is difficult to find a GPS satellite-ground receiver pair whose ray path is close to the ray path of the radio occultation measurement of the planetary atmosphere. Therefore, we develop a method to estimate the TEC fluctua-tion of the terrestrial ionosphere along the ray path of the radio occultation by many GPS satellite-ground receiver pairs. The feasibility of this method is tested by regarding one GPS satellite as the Nozomi or Selene spacecraft. A qualitatively good agreement between the true TEC and the estimated TEC was obtained by this method., 2000, 678, 1, 30, Report research institution

Presentations

  • Hiroki Ando; Katsuyuki Noguchi; Takeshi Imamura, Workshop on Venus and other related atmospheres, Long-term variation of temperature and H2SO4 gas mixing ratio by the Venus Express and Akatsuki radio occultation measurements, Oral presentation, 26 Mar. 2024
  • Katsuyuki Noguchi; Hinako Onuma; Hiroki Ando; Takeshi Imamura; Hideo Sagawa, Workshop on Venus and other related atmospheres, Derivation of vertical profiles of sulfur dioxide (SO2) in the Venus cloud layer by the Akatsuki radio occultation measurements, Oral presentation, 26 Mar. 2024
  • Oral presentation, 23 Oct. 2023
  • Oral presentation, 23 Oct. 2023
  • Poster presentation, 11 Oct. 2023
  • Silvia Tellmann; Ber; d Haeusler; Martin Paetzold; Hiroki Ando; Takeshi Imamura; Katsuyuki Noguchi; Janusz Oschlisniok; Kerstin Peter; Caroline Dumoulin; Pascal Rosenbla, 55th Annual Meeting of the Division for Planetary Sciences, Long-term Studies of the Venusian atmosphere with the Radio Occultation Experiment VeRa on Venus Express, Oral presentation, 06 Oct. 2023
  • Silvia TELLMANN; Martin PAETZOLD, Be; HAEUSLER; Hiroki ANDO; Takeshi IMAMURA; Katsuyuki NOGUCHI; Janusz OSCHLISNIOK; Kerstin Peter, Asia Oceania Geosciences Society (AOGS) 20th Annual Meeting, Long-Term Studies of the Venusian Atmosphere by the radio occultation experiments on Venus Express and PVO, Oral presentation, 30 Jul. 2023
  • Oral presentation, 24 May 2023
  • Nozomi Kakinuma; Takeshi Imamura; Shohei Aoki; Katsuyuki Noguchi; Armin Kleinboehl, Mid-latitude disturbances in the Martian atmosphere studied with MRO MCS data, Poster presentation, 23 May 2023
  • Nonoka Takahashi; Katsuyuki Noguchi; Takeshi Imamura, A study on the vertical structures of the Martian atmosphere in the radio occultation measurements with Full Spectrum Inversion, Poster presentation, 23 May 2023
  • Hiroki Ando; Takeshi Imamura; Katsuyuki Noguchi; Silvia Tellmann; Martin Paetzold; Bernd Haeusler; Sanjay Limaye; Raj Kumar Choudhary; Maria Antonita, 2023 EnVision International Venus Science Workshop, Venusian atmospheric structure revealed by Venus Express and Akatsuki radio occultation measurements, Oral presentation, 11 May 2023
  • Katsuyuki Noguchi; Hinako Onuma; Hiroki Ando; Takeshi Imamura; Hideo Sagawa, 2023 EnVision International Venus Science Workshop, Vertical profiles of sulfuric acid vapor (H2SO4) and sulfur dioxide (SO2) in the Venus atmosphere obtained by the Akatsuki radio occultation measurements, Oral presentation, 11 May 2023
  • Katsuyuki Noguchi; Hinako Onuma; Hiroki Ando; Takeshi Imamura; Hideo Sagawa, Workshop for Venus modelling and observations 2023 (Lisbon), SO2 estimations in the Venusian atmosphere observed by spacecrafts, Oral presentation, 22 Mar. 2023
  • Katsuyuki Noguchi; Aika Hagino; Chihiro Idehara; Hiroki Ando; Takeshi Imamura, Workshop for Venus modelling and observations 2023 (Lisbon), Temperature perturbations in the Venusian atmosphere observed by spacecrafts, Oral presentation, 22 Mar. 2023
  • Onuma, H; K. Noguchi; H. Ando; T. Imamura; H. Sagawa, The 54th Lunar and Planetary Science Conference, Derivation of Vertical Profiles of SO2 in the Venus Cloud Layer by the Akatsuki Radio Occultation Measurements, Poster presentation, 14 Mar. 2023
  • Katsuyuki Noguchi; Aika Hagino; Chihiro Idehara; Hiroki Ando; Takeshi Imamura, Workshop for Venus modelling and observations 2023 (Paris), Temperature perturbations in the Venusian atmosphere observed by spacecrafts, Oral presentation, 14 Mar. 2023
  • Oral presentation, 16 Feb. 2023, 16 Feb. 2023 - 16 Feb. 2023
  • Ando, H; T. Imamura; K. Nogouchi; S. Tellmann; M. Paetzold; B. Haeusler; R. K. Choudhary; M. Antonita, Venus Surface and Atmosphere, Venusian Atmospheric Structures Revealed by Akatsuki Radio Occultation Measurements, Oral presentation, 31 Jan. 2023
  • Hiroki Ando; Katsuyuki Noguchi; Takeshi Imamura; Masahiro Takagi; Norihiko Sugimoto; Yoshihisa Matsuda; Silvia Tellmann; Martin Paetzold; Bernd Haeusler; Sanjay S Limaye; R. K. Choudhary; Maria Antonita, American Geophysical Union Fall Meeting 2022, Vertical structure of the thermal tides in the Venusian equatorial region clarified by Akatsuki radio occultation measurements, Oral presentation, 15 Dec. 2022
  • Poster presentation, 05 Nov. 2022
  • Poster presentation, 05 Nov. 2022
  • Oral presentation, 24 Oct. 2022
  • Takeshi Imamura; Hiroki Ando; Katsuyuki Noguchi; R. K. Choudhary; Bernd Haeusler; Martin Paetzold; Silvia Tellmann, Venus Science Conference 2022, Recent results on the Venusian atmosphere from Akatsuki radio occultation, Oral presentation, 29 Sep. 2022
  • Ando, H; K. Noguchi; T. Imamura; M. Takagi; N. Sugimoto; Y. Matsuda; S. Tellmann; M. Paetzold; B. Haeusler; S. S. Limaye; R. Kumar Choudhary; M. Antonita, Asia Oceania Geosciences Society (AOGS) 19th Annual Meeting, Vertical Structure of Thermal Tides in the Venus Equatorial Region Revealed by Akatsuki Radio Occultation Measurements, Oral presentation, 01 Aug. 2022
  • Ando, Hiroki; Katsuyuki Noguchi; Takeshi Imamura; Hinako Onuma; Hideo Sagawa, 44th COSPAR Scientific Assembly, H2SO4 and SO2 abundances in the Venus equatorial region measured by Akatsuki radio occultation, Poster presentation, 16 Jul. 2022
  • Noguchi, K; M. Shimomura; A. Kleinboehl; D. Kass; S. Piqueux, Seventh International Workshop on the Mars Atmosphere: Modelling and Observations, Rederivation of the MGS Radio Occultation Measurements in the Martian South Polar Winter Regions Using MRO-MCS Temperature Climatology, Poster presentation, 14 Jun. 2022
  • Poster presentation, 02 Jun. 2022
  • Oral presentation, 23 May 2022
  • Oral presentation, 17 Feb. 2022
  • Oral presentation, 06 Dec. 2021
  • Takeshi Imamura; Hiroki Ando; Katsuyuki Noguchi; R. K. Choudhary; Bernd Haeusler; Martin Paetzold; Silvia Tellmann, Venus Science Conference 2021, Results from the Akatsuki radio occultation on Venus, Oral presentation, 23 Nov. 2021
  • Oral presentation, 01 Nov. 2021
  • Oral presentation, 11 Oct. 2021
  • Hiroki Ando; Takeshi Imamura; Katsuyuki Noguchi; Silvia Tellmann; Martin Paetzold; Bernd Haeusler; Sanjay Limaye; R.K. Choudhary, URSI GASS 2021, Atmospheric structure of Venus revealed by Akatsuki radio occultation measurements, Invited oral presentation, 02 Sep. 2021
  • Mao Shimomura; Katsuyuki Noguchi; Armin Kleinboehl; David Kass; Sylvain Piqueux, Mars Climate Sounder extended Science Team Meeting, CO2 supersaturation in the southern polar night, Oral presentation, 18 Aug. 2021
  • Katsuyuki Noguchi; Yuki Matsumoto; Reina Iwai; Nao Shimoji; Mayu Ueda; Armin Kleinboehl; David Kass, Mars Climate Sounder extended Science Team Meeting, Correlation among dust, ice clouds and temperature, and dust enhancement in the upper altitudes, Oral presentation, 18 Aug. 2021
  • Katsuyuki Noguchi; Hinako Onuma; Norihiko Sugimoto; Yukiko Fujisawa; Masahiro Takagi; Hiroki Ando; Takeshi Imamura, Asia Oceania Geosciences Society (AOGS) 18th Annual Meeting, Temperature fluctuations observed in the upper atmosphere of Venus, Oral presentation, 02 Aug. 2021
  • Oral presentation, 18 Feb. 2021, 18 Feb. 2021 - 18 Feb. 2021
  • Katsuyuki Noguchi; Armin Kleinboehl; David Kass; Sylvain Piqueux, 43rd COSPAR Scientific Assembly, Rederivation of the MGS radio occultation measurements in the Martian south polar winter regions using MRO-MCS temperature climatology, Oral presentation, 01 Feb. 2021, 28 Jan. 2021 - 04 Feb. 2021
  • Oral presentation, 01 Nov. 2020, 01 Nov. 2020 - 04 Nov. 2020
  • Poster presentation, 12 Jul. 2020, 12 Jul. 2020 - 16 Jul. 2020
  • 2018
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • 2017
  • the 6th International Workshop on the Mars Atmosphere: Modelling and Observations, CO2 SUPERSATURATION BY ATMOSPHERIC WAVES IN THE MARTIAN POLAR NIGHTS, 2017
  • Asia Oceania Geosciences Society (AOGS) 14th Annual Meeting, 4D Gridding of MRO-MCS Data for Easier Analysis and Visualization, 2017
  • The 8th International DOAS Workshop, Feasibility Study for the Observation for NO2 Air Pollution Using High Spatial Resolution Mini-satellites, 2017
  • The 8th International DOAS Workshop, Measurements of stratospheric ozone and nitrogen dioxide with spectrometer type balloon-borne optical ozone sensor, 2017
  • European Planetary Science Congress (EPSC) 2017, Atmospheric CO2 supersaturation in the Martian polar nights: Role of large-scale atmospheric waves, 2017
  • European Planetary Science Congress (EPSC) 2017, Initial results of the radio occultation experiment in the Venus orbiter mission Akatsuki, 2017
  • 2016
  • 2016
  • 2016
  • 2016
  • 2016
  • 2016
  • 2016
  • 2016
  • Japan Geoscience Union Meeting 2016, Longitudinal dependence of CO2 supersaturation during northern winter in the Martian atmosphere, 2016
  • Sixth International Conference on Mars Polar Science and Exploration, Atmospheric CO2 supersaturation observed in the Martian polar nights, 2016
  • the 6th Geostationary Environmental Monitoring Spectrometer Science Team Meeting (GEMS-STM-6), A concept of mini-satellite of air quality observation -a possibility after the GEMS satellite-, 2016
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • 2015
  • Japan Geoscience Union Meeting 2015, The possibilities for life on Titan - the constraints for methanogenic bacteria with acetylene-based metabolic pathways, 2015
  • Japan Geoscience Union Meeting 2015, Interannual analyses of the longitudinal distributions of Martian water ice clouds, dust and temperature by MRO-MCS, 2015
  • Radio Science Symposium on Earth and Planetary Atmospheres, A study on the CO2 condensation in the Martian atmosphere by radio occultation, 2015
  • 2nd COSPAR Symposium, A study on the relationships among water ice clouds, dust and temperature in the Martian atmosphere by using MRO-MCS data, 2015
  • The 23rd CEReS International Symposium, A study on the Martian atmospheric environment using remote sensing data obtained by Mars orbiter missions, 2015
  • The 23rd CEReS International Symposium, New numerical model on the radiative field of Martian atmosphere and strategy of radiative field observation in Mars landing mission in the future, 2015
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • 2014
  • Japan Geoscience Union meeting 2014, Interannual analyses of the meridional distributions of Martian dust and clouds obtained by MRO-MCS, 2014
  • Japan Geoscience Union meeting 2014, Estimation of Martian atmospheric composition change caused by CO2 condensation and its application to radio occultation, 2014
  • Japan Geoscience Union meeting 2014, Environmental monitoring camera system for the Martian aerosols and water vapor for the Japanese Mars rover, MELOS, 2014
  • Mars Express MaRS / Venus Express VeRa / Rosetta RSI Radio Science Team Meeting, Rederivation of MGS radio occultation measurements in the polar nights region in consideration of CO2 condensation, 2014
  • Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, Proposal of the Environment Camera System Monitoring the Martian Aerosols and Water Vapor Column Density for the Japanese Mars Rover Proposal for MELOS Program, 2014
  • Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, Effect of Atmospheric Waves on CO2 Saturation in the Martian Atmosphere, 2014
  • Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, A Sensitivity Study of UV Surface Albedo for Spaceborne Tropospheric Ozone Measurements Over China, 2014
  • Intercomparison of radiative transfer models for atmospheric composition measurements, 2014
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • 2013
  • Asia Oceania Geosciences Society (AOGS) Annual Meeting, Current Status of Air Quality Missions in Japan: APOLLO and GMAP-Asia, 2013
  • Asia Oceania Geosciences Society (AOGS) Annual Meeting, The Effect of Surface BRDF of Various Land Cover Types on the Measurement of Tropospheric NO2 from a Geostationary Orbit, 2013
  • Asia Oceania Geosciences Society (AOGS) Annual Meeting, Simulation study of synergetic retrieval for tropospheric ozone with UV, TIR, and MW measurements, 2013
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • 2012
  • APOLLO team meeting, Current status of discussion on the UV/Visible instrumentation and preliminary feasibility study, 2012
  • Japan Geoscience Union Meeting 2012, The effect of the surface BRDF on the measurement of tropospheric NO2 from a geostationary orbit and ISS, 2012
  • European Planetary Science Congress (EPSC) 2012, Statistical analysis of CO2 supersaturation in the Martian atmosphere observed by MGS radio occultation measurements, 2012
  • The effect of the surface BRDF on the measurement of tropospheric NO2 from ageostationary orbit and ISS: evaluation of AMF, 2012
  • CO2 supersaturation observed in the Martian atmosphere with the MGS radio occultation measurements, 2012
  • Land Surface Remote Sensing conference in SPIE Asia-Pacific Remote Sensing, Basic study of BRDF over Tokyo for the spaceborne measurements of atmospheric trace gases, 2012
  • American Geophysical Union (AGU) Fall Meeting 2012, CO2 supersaturation observed in the Martian lower atmosphere with Mars orbiters, 2012
  • 2011
  • 2011
  • 2011
  • 2011
  • 2011
  • Japan Geoscience Union Meeting 2011, A case study of the transport of tropospheric nitrogen dioxide from China observed from space, 2011
  • The 5th International DOAS Workshop, The effect of the surface BRDF on the measurement of tropospheric NO2 from a geostationary orbit, 2011
  • The 5th International DOAS Workshop, Quantifying the relationship between the measurement precision and specifications of a UV/visible sensor on a geostationary satellite, 2011
  • GEMS workshop, A feasibility study for GMAP-Asia and APOLLO UV-visible observations and its implications for GEMS, 2011
  • 2010
  • 2010
  • 2010
  • 2010
  • 2010
  • 2010
  • 2010
  • European Geosciences Union (EGU) General Assembly 2010, A feasibility study for the monitoring of diurnal variations of the tropospheric NO2 over Tokyo from a geostationary satellite, 2010
  • 38th COSPAR Scientific Assembly, A simulation for UV-VIS observations of tropospheric composition from a geostationary satellite over Asia, 2010
  • 38th COSPAR Scientific Assembly, A feasibility study for the monitoring of diurnal variations of the tropospheric NO2 over Tokyo from a geostationary satellite, 2010
  • International GEMS Workshop: Requirements on Science and Instrument, A simulation for UV-VIS observations of tropospheric composition from a geostationary satellite over Asia, 2010
  • The Korea/Japan collaborative meeting, A simulation for UV-VIS observations of tropospheric composition from a geostationary satellite over Asia, 2010
  • American Geophysical Union (AGU) Fall Meeting 2010, A feasibility study for the monitoring of diurnal variations of the tropospheric NO2 over Tokyo from a geostationary satellite, 2010
  • 2009
  • 2009
  • European Geosciences Union (EGU) General Assembly 2009, Comparison of tropospheric NO2 observations by GOME and ground stations over Tokyo, Japan, 2009
  • 2009 American Geophysical Union (AGU) Fall Meeting, Intercomparison of tropospheric NO2 concentration by GOME and the air-quality monitoring network in the Tokyo region, Japan, 2009
  • 2008
  • 2008
  • 2008
  • 2008
  • 2008
  • 2008
  • 2008
  • 2008
  • 2008
  • IGAC 10th International Conference, Comparison of tropospheric NO2 from GOME and surface measurements in the Tokyo region, Japan, 2008
  • NOGUCHI Katsuyuki; Touma, E; K. Noguchi; M. Takata; H. Kamo; N. Nide; K. Joe, The 2007 International Conference on Parallel and Distributed Processing Techniques and Applications, 3D Visualization System Gateau for Atmospheric Science: Design Concept and Practical Evaluation, 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • 2007
  • European Geosciences Union (EGU) General Assembly 2007, Comparison between GOME and surface measurements of tropospheric NO2 over Japan, 2007
  • Tropospheric NO2 measured by satellites (ACCENT/TROPOSAT-2 workshop), Comparison between tropospheric NO2 vertical columns by GOME and surface NO2 mixing ratio by the air-monitoring network over Japan, 2007
  • 2006
  • 2006
  • 2006
  • 2006
  • 2006
  • 2006
  • 2006
  • 2005
  • 2005
  • 2005
  • 2005
  • 2005
  • 2005
  • 2005
  • 2005
  • 2005 American Geophysical Union (AGU) Fall Meeting, Intercomparison among tropospheric ozone and nitrogen dioxide data obtained by satellite- and ground-based measurements, 2005
  • 2004
  • 2004
  • 2004
  • Quadrennial Ozone Symposium 2004, Irreversible vertical mixing of ozone caused by inertio-gravity wave breaking in the lower stratosphere, 2004
  • Quadrennial Ozone Symposium 2004, Climatology and origin of small-scale vertical structures in stratospheric ozone, 2004
  • 2004 American Geophysical Union (AGU) Fall Meeting, Climatology and origin of small-scale vertical structures of ozone in the lower stratosphere, 2004

Works

  • Apr. 2018 - Mar. 2019
  • A study on the Martian atmospheric environment using remote sensing data obtained by Mars orbiter missions, Apr. 2018 - Mar. 2019
  • Apr. 2017 - Mar. 2018
  • A study on the Martian atmospheric environment using remote sensing data obtained by Mars orbiter missions, Apr. 2017 - Mar. 2018
  • Apr. 2016 - Mar. 2017
  • A study on the Martian atmospheric environment using remote sensing data obtained by Mars orbiter missions, Apr. 2016 - Mar. 2017
  • Sep. 2014 - Mar. 2017
  • Apr. 2015 - Mar. 2016
  • A study on the Martian atmospheric environment using remote sensing data obtained by Mars orbiter missions, Apr. 2015 - Mar. 2016
  • Apr. 2014 - Mar. 2015
  • Apr. 2014 - Mar. 2015
  • Apr. 2013 - Mar. 2014
  • Application of land cover type maps to the spaceborne measurements of tropospheric constituents, Apr. 2013 - Mar. 2014
  • May 2013 - May 2013
  • Apr. 2012 - Mar. 2013
  • Apr. 2012 - Mar. 2013
  • Investigation of retrieval technique of tropospheric ozone from UV-Vis.-IR spectra measured from a geostationary satellite, Apr. 2012 - Mar. 2013
  • Apr. 2011 - Mar. 2012
  • Apr. 2011 - Mar. 2012
  • Investigation of retrieval technique of tropospheric ozone from UV-Vis.-IR spectra measured from a geostationary satellite, Apr. 2011 - Mar. 2012
  • Investigation of remote sensing technique of tropospheric ozone and aerosol radiation effect for the network observation, Apr. 2011 - Mar. 2012

Research Projects

  • 基盤研究(C), Apr. 2022 - Mar. 2025, 22K03701, Principal investigator, 導出手法を改良した新しい電波掩蔽データによる火星大気の主成分凝結に関する研究, 野口 克行, 日本学術振興会, 科学研究費助成事業 基盤研究(C), 奈良女子大学, 4290000, 3300000, 990000, kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (B), Apr. 2020 - Mar. 2024, 20H01958, Coinvestigator, High vertical resolution observation of planetary atmospheres by radio occultation, 今村 剛; 安藤 紘基; 野口 克行; 神山 徹; 小郷原 一智; 杉山 耕一朗, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), The University of Tokyo, 17550000, 13500000, 4050000, kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (B), Apr. 2019 - Mar. 2023, 19H01971, Coinvestigator, 階層的数値モデルによる金星大気重力波の励起、伝播、散逸過程の解明, 杉本 憲彦; 高木 征弘; 安藤 紘基; 野口 克行; 黒田 剛史; 宮本 佳明, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Keio University, 17160000, 13200000, 3960000, 大気重力波は、運動量やエネルギーを輸送、再分配し、惑星大気において重要な働きを担う。本課題では、階層的な数値モデルを用いて、金星大気の重力波の諸過程を包括的に解明することが目標である。2020年度は、金星探査機「あかつき」および「Venus Express」の電波掩蔽観測で明らかにされた雲層下部の温度構造が、金星大気大循環モデルで整合的に再現されていたため、この成因の解析を中心に行った。また、雲層下部には惑星規模の大気重力波である赤道ケルビン波の存在が観測的に示唆されていて、それと関連した雲量変動も観測されている。そこで、金星大気大循環モデルに簡易版の雲物理過程を導入して、赤道ケルビン波と雲量の変動を調べられる枠組みの構築を目指した。さらに熱潮汐波と細かいスケールの大気重力波の相互作用を調べるために、T639L260(1920×960×260格子点)の超高解像度数値実験への拡張を行い、スピンアップ計算を繰り返した。
    赤道ケルビン波は雲層上端にもその存在が示唆されており、スーパーローテーションの風速変動に関わると考えられている。一方で、我々の金星大気大循環モデルでは、この波をこれまで再現できていない。そこで、データ同化技術を用いて、赤道ケルビン波の観測が衛星観測等で得られた際に、これを同化によって金星大気大循環モデル内に再現可能かどうかについて、観測システムシミュレーション実験を行った。その結果、高度70km付近の風速観測が6時間毎にあれば, 赤道ケルビン波が再現可能であることがわかった。本成果は、未だあかつき観測によって赤道ケルビン波が明瞭に観測された時期はないものの、仮に紫外線カメラでこれを観測することができれば、雲追跡で導出できる風速の同化によって、金星大気大循環モデル内に赤道ケルビン波を十分に再現可能であることを示唆している。, kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (C), Apr. 2019 - Mar. 2022, 19K03951, Principal investigator, 火星気象を特徴付ける大気主成分凝結と大気波動の相互作用の解明, 野口 克行, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4420000, 3400000, 1020000, 今年度は、主に数値モデルによるデータ解析を実施した。研究協力者から提供された火星大気大循環モデル (MGCM)による計算結果を用いて、大気重力波によると思われる小規模な空間スケールを持つ気温擾乱に着目した。この数値モデルは、比較的波長の長い大気重力波を直接再現することが可能なほどの高い空間分解能を持つ。数値モデルで計算された気温の高度分布に対して鉛直波長4km以下のハイパスフィルタを掛けることで、気温擾乱を抽出した。この気温擾乱を大気重力波によるものとみなして、波の活動度（ポテンシャルエネルギー）を計算した。解析対象とした季節は、北半球の冬から春に相当する時期（Ls=270-300度）である。
    その結果、観測データ（米国の火星探査機マーズグローバルサーベイヤーで実施された電波掩蔽観測によるデータ）で見つかっていた高度10-20kmにおけるポテンシャルエネルギーの東西波数2の構造が、この数値モデルでも再現されていることが明らかになった。
    また、電波掩蔽観測では観測原理上、高度40km付近までしかデータが得られていないが、この数値モデルでは仕様上高度90kmまでの計算が可能である。観測データでは得られていないより高い高度領域においてもポテンシャルエネルギーの解析を行ったところ、東西波数2の構造は高度10-20kmの領域だけではなく、他の高度領域にも存在していることが示唆された。また、その高度は特徴的な緯度依存性を持っていることも示唆された。, kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (B), Apr. 2016 - Mar. 2019, 16H04060, Study of gravity waves in planetary atmospheres using radio occultation experiments and numerical modeling, Imamura Takeshi, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Tokyo, 14560000, 11200000, 3360000, Radio occultation observation data of Venus was analyzed by radio holography method to improve the vertical resolution, and universal existence of waves and neutral layers with vertical scales of several hundred meters were revealed. Sharp inversion layers were also found to exist at the top of high latitude convection layers. We also carried out numerical simulations of the convective layer with high vertical resolution and a wide computational domain, and reproduced the convective motion and the gravity waves excited by convection. Breaking of gravity waves is suggested to be caused by shear instability and convective instability. Furthermore, we could understand the height of breaking of gravity waves and the amplitude of gravity waves in comparison with the observational results of radio wave occultation observation., kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (C), Apr. 2015 - Mar. 2018, 15K05289, Estimation of vertical profiles of CO2 mixing ratio in the Martian polar nights by using radio occultation technique, Noguchi Katsuyuki; Takeshi Kuroda; Takeshi Imamura, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Nara Women's University, 4810000, 3700000, 1110000, The present study proposed a method to obtain vertical profiles of CO2 mixing ratio, which is the main component of the Martian atmosphere, by using radio occultation technique. Normally radio occultation technique obtains temperature-pressure profiles of planetary atmospheres, assuming atmospheric compositions. Our method, however, estimates CO2 mixing ratio in the polar nights, where CO2 condensates, assuming that air temperature in observed regions is CO2 saturation temperature. By using this method, we successfully obtained vertical profiles of CO2 mixing ratio in the polar nights. We also showed that atmospheric waves including stationary waves and transient waves had an important role on the occurrence of CO2 saturation in the polar nights., kaken
    対象リソースIRI
  • Grant-in-Aid for Young Scientists (B), Apr. 2012 - Mar. 2014, 24710008, Algorithm for the observations of air pollution by next generation satellites, NOGUCHI Katsuyuki, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Nara Women's University, 2340000, 1800000, 540000, The algorithm for the observations of air pollution by using next generation platforms, such as geostationary satellites and the international space station, has been developed. The dependence of the surface reflectivity on the incident and outgoing directions was considered, since the dependence is important for those platforms. The results were presented in the domestic and international conferences and published in the peer-reviewed journal, Atmospheric Measurement Techniques Discussion (AMTD)., kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (C), 2010 - 2012, 22540457, Observation of ozone, nitrogen dioxide, chlorine dioxide, and bromine monoxide by the optical ozonesonde with spectrometer, MURATA Isao; KASABA Yasumasa; NAKAGAWA Hiromu; FUJIWARA Hitoshi; NOGUCHI Katsuyuki, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Tohoku University, 4160000, 3200000, 960000, The purpose of this research was the validation of our new instrument that can measure NO_2, OClO, and BrO with O_3. We prepared for the balloon experiment in 2010 but quitted due to the trouble of CPU in the instrument. We checked and improved the instrument in2011 and again prepared for the balloon experiment in 2012 but no balloon launched in this year due to the unusual meteorological condition. Therefore, test measurements were performed at ground on the sunrise and culmination. We confirmed that at least the stratospheric column of NO_2 can be derived., kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (B), 2010 - 2012, 22310004, Development of remote sensing technique for lower tropospheric ozone by simultaneous measurement of UV and visible solar scattered light spectra, KITA Kazuyuki; IRIE Hitoshi; NOGUCHI Katsuyuki; HAYASHIDA Sachiko, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Ibaraki University, 18720000, 14400000, 4320000, A remote sensing technique to measure lower tropospheric ozone with a simultaneous measurement of UV and visible solar scattered spectra has been developed for investigating extensive surface ozone increases. Error analyses and validation measurements was conducted. Based on the surface observation, evaluation of ozone column amount from visible spectra has een succeeded with enough accuracy. The interference by surface Albedo spectra and the influence by aerosol scattering have been estimated with observational data and radiative transfer model calculations. Aircraft observations were conducted for the validation of the technique, and their data analyses are on-going now., kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (C), 2007 - 2008, 19540462, Study on tropospheric ozone utilizing satellite data - analysis of the effects of ozone precursors and intrusion from the stratosphere -, HAYASHIDA Sachiko; KUJI Makoto; NOGUCHI Katsuyuki, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Nara Women's University, 4550000, 3500000, 1050000, 本研究課題では、東アジアを中心に集中的に大気微量成分の衛星データ解析を行い、オゾンとその前駆物質を高度別に調べ、アジア大陸から流出する汚染空気塊の影響を調べた。オゾンについては、オゾンゾンデのデータを衛星データと平行して解析した。また、赤外観測データを駆使することで、上部対流圏・対流圏界面付近におけるオゾン高度分布を解析し、成層圏オゾンの流入と人為起源のオゾンとの切り分けを行なうことを試みた。重要なオゾン前駆物質の一つであるNO_2の影響について詳細に解析し、北京や上海といった大都市では年々の増加傾向が停止しているのに対し、郊外の新興都市で増加傾向であることを明らかにした。, kaken
    対象リソースIRI
  • 若手研究(B), 2005 - 2006, 17740312, 人工衛星による分光スペクトル観測を用いた大気成分導出アルゴリズムの開発, 野口 克行, 日本学術振興会, 科学研究費助成事業, 奈良女子大学, 2400000, 2400000, 本年度は、大気汚染物質の濃度データ解析と、その結果を受けたりトリーバルアルゴリズムの改良・開発を行った。大気汚染物質の濃度データ解析については、GOMEセンサによるオゾン、二酸化窒素データを解析した。昨年度に入手したGOMEオゾンデータの検証を、気象庁のオゾンゾンデ観測データによって行った。得られた結果は日本気象学会SOLA誌に投稿し、受理された。また、二酸化窒素データは国内の大気汚染監視局の地表観測データ及び数値モデル計算結果との比較を行った結果、定性的には季節変化が一致するなどよい結果が得られたものの、定量的には違いが見られた。また、太平洋上に二酸化窒素の濃度増大が見られる事例について、数値計算結果と比較するなどの解析を行った。
    このような濃度データ解析と平行して、特に二酸化窒素のリトリーバルアルゴリズムの改良開発に取り組んだ。地表データ・数値計算結果とGOME観測データが定量的に異なる問題については、リトリーバルの中で用いられているエアマスファクターを変更し精度の高いものに改め、実装することを目指した。データフォーマットを一致させるなどの技術的な課題をほぼクリアし、試験的に新しいアルゴリズムを用いてリトリーバルを行うことに成功した。また、海洋上のリトリーバルについては、パラメータ設定の不良など人為的な要因がないかをチェックした。その結果、観測原理的に解決が難しい対流圏量と成層圏量の分離において、当初想定していたよりも大きな不確定性が生じている可能性が明らかになった。, kaken
    対象リソースIRI
  • 01 Apr. 2021 - 31 Mar. 2022, Principal investigator, 宇宙からのリモートセンシングによる地球惑星大気環境の研究, 千葉大学, 千葉大学環境リモートセンシング研究センター共同利用研究
  • 01 Apr. 2022 - 31 Mar. 2023, Principal investigator, 宇宙からのリモートセンシングによる地球惑星大気環境の研究, 千葉大学, 千葉大学環境リモートセンシング研究センター共同利用研究

■Ⅲ．社会連携活動実績

１．公的団体の委員等（審議会、国家試験委員、他大学評価委員，科研費審査委員等）

  • 宇宙航空研究開発機構(JAXA)宇宙科学研究所(ISAS), 宇宙理学メンバ, Jun. 2013 - Present, Government
  • 国立研究開発法人国立環境研究所, GOSAT-GW衛星システムCDR（事前説明会）有識者, Sep. 2023 - Sep. 2023, Government
  • 国立研究開発法人国立環境研究所, GOSAT-GW衛星システム詳細設計審査会有識者, Jun. 2023 - Jun. 2023, Government
  • 国立研究開発法人国立環境研究所, TANSO-３反映審査会有識者, Feb. 2023 - Feb. 2023, Government
  • 国立研究開発法人国立環境研究所, TANSO-３詳細設計審査（CDR）本審査会有識者, Feb. 2022 - Feb. 2022, Government
  • 温室効果ガス観測技術衛星３号(GOSAT-3)有識者会議, Oct. 2019 - Sep. 2021, Government