研究者総覧

久慈 誠 (クジ マコト)

  • 研究院自然科学系環境科学領域 准教授
メールアドレス:
makatoics.nara-wu.ac.jp
Last Updated :2021/06/02

researchmap

学位

  • 博士(理学), 東北大学

研究分野

  • 自然科学一般, 大気水圏科学
  • 環境・農学, 環境動態解析

経歴

  • 1993年 - 2012年 奈良女子大学・理学部
  • 2013年 奈良女子大学・研究院・自然科学系

学歴

  • - 1993年 東北大学 理学研究科 地球物理学 日本国
  • - 1993年 東北大学 Graduate School, Division of Natural Science Geophysics

受賞

  • NASA Honor Group Achievement Award, 2008年
  • 日本リモートセンシング学会 論文賞, 2003年, JPN

論文

  • Development of a cloud detection method from whole-sky color images

    Yabuki, Masanori; Shiobara, Masataka; Nishinaka, Kimiko; Kuji, Makoto

    A method is proposed for detecting clouds from whole-sky color images obtained with an all-sky camera (ASC) system. In polar regions, cloud detection using whole-sky images usually suffers from large uncertainties in fractional cloud cover retrievals because of large solar zenith angles (SZAs) and high surface albedo, which cause "whitening" in the images. These problems are addressed by using differences between real images and virtual clear-sky images for a particular observation time with the same SZA. The method is applied to ASC images obtained at Ny-Alesund, Svalbard in May of 2005-2007, and the results are compared with Micro-Pulse Lidar (MPL) measurements. When no clouds were detected by MPL, the false cloud detection rate from ASC classification was 2.1% in total hours. Conversely, when clouds were detected by MPL, the ASC classification underestimated the clouds by 11.6%. In most cases, this occurred when MPL detected very optically thin clouds. Furthermore, the variability of cloud fractions estimated by MPL and ASC was roughly constant regardless of the SZA. Thus, it is confirmed that the method developed in this study is valid for cloud detection from whole-sky color images. (C) 2014 Elsevier B.V. and NIPR. All rights reserved., 2014年12月, POLAR SCIENCE, 8 (4), 315 - 326, doi;web_of_science

    研究論文(学術雑誌)

  • Characteristics of Aerosol Properties of Haze and Yellow Sand Examined from SKYNET Measurements over East China Sea

    Shiho Kitakoga; Yoko Inoue; Makoto Kuji; Tadahiro Hayasaka

    In this study, characteristics of atmospheric phenomena such as haze and yellow sand (Kosa) events were investigated in terms of aerosols by using sky radiometers, Light Detection and Ranging (LIDAR), and optical particle counter (OPC) observations at Fukue-jima and Amami-Oshima Islands from 2003 to 2004. As a result of the data analyses, we determined that aerosol properties such as loading, light absorptivity, particle size, non-sphericity, and vertical distribution showed specific features both in the atmospheric column and near the surface, depending on the atmospheric phenomena compared with normal atmospheric conditions. A specific case was clearly confirmed: the influence of limited light absorptivity dominated even during a Kosa event. In this study, it was confirmed that even if each ground-based instrument observed the phenomena with different ranges for the atmospheric column, lower layer, and surface, the retrieved aerosol properties were consistent. We demonstrated that the combined use of state-of-the-art instrumentation to detect aerosols is useful for quantitatively characterizing the atmospheric phenomena., 2014年, JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 92A, 57 - 69, doi;web_of_science

    研究論文(学術雑誌)

  • Observations of cloud and aerosol from GCOM-C SGLI

    T. Y. Nakajima; M. Kuji; I. Sano; Nick Schutgens; Y. Mano; J. Riedi; H. Ishida; K. Suzuki; H. Okamoto; T. Matsui; H. Letu

    Observing cloud and aerosol distributions and their optical and microphysical properties are one of important activities for the global climate change study, since the role of these particles and their interactive responses to the climate system are still in mystery. The Second generation Global Imager (SGLI) aboard the GCOM-C satellite is a follow-on sensor of the Global Imager (GLI) aboard the Midori-2 satellite. It is designed for globally observing clouds and aerosols targets with high-accuracy and quick recurrence. The major geophysical parameters retrieved from SGLI atmosphere's algorithm are cloud optical thickness, cloud particle radii, cloud top temperature, cloud geometrical thickness, aerosol optical thickness, and aerosol Angstrom exponents. Cloud discriminations all of SGLI pixels will also be supplied. It is notable that the SGLI has some functions specialized for observing aerosol properties over ocean and land. They are 0.38-μm channels, multi-angles and polarization capability in 0.67 and 0.86-μm channels. This paper introduces strategy of the atmospheric observations by use of the GCOM-C/SGLI and the latest research results obtained from GLIto-SGLI scientific activities., 2010年, International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 38, 30 - 34, scopus;scopus_citedby;url

    研究論文(国際会議プロシーディングス)

  • Retrieval of water cloud top and bottom heights and the validation with ground-based observations

    Makoto Kuji

    It is of great interest to investigate the optical, microphysical, and geometrical properties of clouds that play crucial role in the earth climate system. Water clouds are generally optically thick and consequently have a great cooling effect on earth-atmosphere radiation budget. The water clouds usually exist in a lower troposphere where aerosol-cloud interaction occurs frequently, and then cloud droplet size variation influences reflection of solar radiation as well. Further, a cloud layer height is one of the key properties that determine downward longwave radiation and then surface radiation budget. In this study, top height, geometrical thickness and bottom height of a water cloud layer are investigated as cloud geometrical properties in particular. Several studies show that observation data of some spectral regions including oxygen A-band, enables us to retrieve the cloud geometrical properties as well as the optical thickness and the effective particle radius. In this study, an algorithm was developed to retrieve simultaneously the cloud optical thickness, effective particle radius, top height, geometrical thickness and then bottom height of a cloud layer with the spectral observation of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to Advanced Earth Observing Satellite . .II / Global Imager (ADEOS-II / GLI) dataset so as to retrieve global distribution of cloud geometrical properties. The retrieved results around Japan were compared with other observation such as ground-based active sensors, which suggest this algorithm works for cloud system over ocean at least although the cloud bottom height was underestimated. The underestimation is attributed to cloud inhomogeneity at this stage and should be investigated in detail., 2013年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE XVIII; AND OPTICS IN ATMOSPHERIC PROPAGATION AND ADAPTIVE SYSTEMS XVI, 8890, doi;web_of_science

    研究論文(国際会議プロシーディングス)

  • OBSERVATIONS OF CLOUD AND AEROSOL FROM GCOM-C SGLI

    T. Y. Nakajima; M. Kuji; I. Sano; Nick Schutgens; Y. Mano; J. Riedi; H. Ishida; K. Suzuki; H. Okamoto; T. Matsui; H. Letu

    Observing cloud and aerosol distributions and their optical and microphysical properties are one of important activities for the global climate change study, since the role of these particles and their interactive responses to the climate system are still in mystery. The Second generation Global Imager (SGLI) aboard the GCOM-C satellite is a follow-on sensor of the Global Imager (GLI) aboard the Midori-2 satellite. It is designed for globally observing clouds and aerosols targets with high-accuracy and quick recurrence. The major geophysical parameters retrieved from SGLI atmosphere's algorithm are cloud optical thickness, cloud particle radii, cloud top temperature, cloud geometrical thickness, aerosol optical thickness, and aerosol Angstrom exponents. Cloud discriminations all of SGLI pixels will also be supplied. It is notable that the SGLI has some functions specialized for observing aerosol properties over ocean and land. They are 0.38-mu m channels, multi-angles and polarization capability in 0.67 and 0.86-mu m channels. This paper introduces strategy of the atmospheric observations by use of the GCOM-C/SGLI and the latest research results obtained from GLI-to-SGLI scientific activities., 2010年, NETWORKING THE WORLD WITH REMOTE SENSING, 38, 30 - 34, web_of_science

    研究論文(国際会議プロシーディングス)

  • Optimization of the Advanced Earth Observing Satellite II Global Imager channels by use of radiative transfer calculations

    Takashi Y. Nakajima; Teruyuki Nakajima; Masakatsu Nakajima; Hajime Fukushima; Makoto Kuji; Akihiro Uchiyama; Motoaki Kishino

    The channel specifications of the Global Imager onboard the Advanced Earth Observing Satellite II have been determined by extensive numerical experiments. The results show that there is an optimum feasible position for each ocean color channel. The bandwidth of the 0.763-µm channel should be less than 10 nm for good sensitivity to the cloud top height and geometric thickness of the cloud layer a 40-nm bandwidth is suitable for the 1.38-µm channel to have the strongest contrast between cloudy and clear radiance with a sufficient radiant energy and a 3.7-µm channel is better than a 3.95-µm channel for estimation of the sea surface temperature (SST) and determination of the cloud particle size when the bandwidth of the channel is 0.33 µm. A three-wavelength combination of 6.7, 7.3, and 7.5 µm is an optimized choice for water vapor profiling. The combination of 8.6, 10.8, and 12.0 µm is suitable for cloud microphysics and SST retrievals with the split-window technique. © 1998 Optical Society of America., 1998年05月20日, Applied Optics, 37 (15), 3149 - 3163, doi

    研究論文(学術雑誌)

  • Cloud Fractions Estimated from Shipboard Whole-Sky Camera and Ceilometer Observations between East Asia and Antarctica

    Makoto KUJI; Atsumi MURASAKI; Masahiro HORI; Masataka SHIOBARA

    2018年, Journal of the Meteorological Society of Japan. Ser. II, 96 (2), 201 - 214, doi;url

    研究論文(学術雑誌)

  • Retrieval of Asian Dust Amount over Land using ADEOS-II/GLI near UV Data

    Makoto Kuji; Noriko Yamanaka; Sachiko Hayashida; Motoaki Yasui; Akihiro Uchiyama; Akihiro Yamazaki; Teruo Aoki

    2005年, SOLA, 1, 33 - 36, doi;url

    研究論文(学術雑誌)

  • 紫外域観測衛星センサによる対流圏エアロゾル観測手法における誤差の検討

    芝田由香里; 蒲生京佳; 山中のり子; 久慈誠; 林田佐智子

    2004年, 日本リモートセンシング学会誌, 24 (4), 387 - 397

  • Retrieval of Precipitable Water Using Near Infrared Channels of Global Imager/Advanced Earth Observing Satellite-II (GLI/ADEOS-II)

    Makoto KUJI; Akihiro UCHIYAMA

    2002年, Journal of The Remote Sensing Society of Japan, 22 (2), 149 - 162

  • 昭和基地受信NOAA衛星HRPTデータの読み出しツールの開発

    久慈 誠; 菊地 信行

    2001年, 南極資料, 45 (3), 353 - 361

  • A method of cloud field detection over Antarctica during the polar night using AVHRR data

    Makoto Kuji; Nobuyuki Kikuchi; Naohiko Hirasawa; Takashi Yamanouchi

    2001年, Polar meteorology and glaciology, 15, 114 - 123

  • The Retrieval of Effective Particle Radius and Liquid Water Path of Low-Level Marine Clouds from NOAA AVHRR Data

    Makoto Kuji; Tadahiro Hayasaka; Nobuyuki Kikuchi; Teruyuki Nakajima; Masayuki Tanaka

    2000年07月, Journal of Applied Meteorology, 39 (7), 999 - 1016, doi;url

    研究論文(学術雑誌)

  • Air truth validation of cloud albedo estimated from NOAA advanced very high resolution radiometer data

    Tadahiro Hayasaka; Makoto Kuji; Masayuki Tanaka

    1994年, Journal of Geophysical Research, 99 (D9), 18685 - 18685, doi;url

    研究論文(学術雑誌)

MISC

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations between east Asia and Antarctica

    Makoto Kuji; Atsumi Murasaki; Masahiro Hori; Masataka Shiobara

    Cloud fractions were observed during research cruises onboard the research vessel (R/V) Shirase between Japan and Antarctica using a whole-sky camera and a ceilometer. The cruises, Japanese Antarctic Research Expeditions (JARE) 55 and 56, took place from November 2013 to April 2014 and from November 2014 to April 2015, respectively. Cloud fractions were estimated from the whole-sky camera based on the sky brightness and spectral characteristics, and the ceilometer recorded the cloud occurrence frequency. According to the comparison of daily-averaged cloud fractions from the whole-sky camera with the ceilometer observations over the open ocean between Japan and Antarctica, the correlation coefficients were 0.87 and 0.93 for JARE 55 and 56, respectively. Overall, the results from both observation methods were consistent over the open ocean. Nevertheless, it was necessary to take surface conditions into consideration, particularly for the estimated cloud fractions from the whole-sky camera, because the contrast in brightness and spectral properties between cloudy and clear skies was lower over the sea ice region, owing to the higher surface albedo. Hence, the classification parameter was expressed as a function of sun elevation over the sea ice region in this study. This parameter was determined from part of the data over the sea ice region during JARE 55 and then applied to JARE 56 as well as to the remaining data from JARE 55. As a result, the daily-averaged cloud fractions over the sea ice region were approximately 84 % and 57 % from JARE 55 and 56, respectively. The daily-averaged cloud fractions estimated from the whole-sky camera were also consistent with the ceilometer observations, where the correlation coefficients with the sea ice region were 0.93 and 0.96 for JARE 55 and 56, respectively., Meteorological Society of Japan, 2018年, Journal of the Meteorological Society of Japan, 96 (2), 201 - 214, doi;url

  • ニーオルスンで観測された雲量

    久慈 誠

    2017年, 北極ニーオルスン基地開設25周年と将来展望, 40

  • 南極昭和基地で観測された雲の特徴

    久慈 誠; 久慈誠; 宮川真友; 塩原匡貴

    2017年, 気象研究ノート「南極氷床と大気物質循環・気候」, (233), 345 - 354

  • 天文学を通じた地学学習の実践検討 −高等学校理科「地学」領域教育における高大連携授業研究の試み−

    久慈 誠; 米田隆恒; 林田佐智子; 久慈誠

    2017年, 奈良女子大学教育システム研究開発センター・教育システム研究, 153 - 156

  • Challenging new remote-sensing of aerosols and clouds from surface at the polar sites

    Shiobara, M; M. Yabuki; T. Takano; H. Okamoto; M. Kuji; H. Kobayashi; A. Uchiyama

    2016年05月, 22nd International Symposium on Polar Sciences

    研究発表ペーパー・要旨(全国大会,その他学術会議)

  • Cloud Fractions Estimated from Shipboard Whole-Sky Camera and Ceilometer Observations

    KUJI Makoto; M. Kuji; R. Fujimoto; M. Miyagawa; R. Funada; M. Hori; H. Kobayashi; S. Koga; J. Matsushita; M. Shiobara

    2016年, Trans. JSASS Aerospace Tech. Japan, 14, pp7, doi

  • 南極昭和基地及び北極ニーオルスンにおける雲の変動

    宮川 真友; 久慈 誠; 矢吹 正教; 塩原 匡貴

    2015年11月, 第6回極域科学シンポジウム

  • 北極スバールバルにおける雲・エアロゾルの地上リモートセンシング観測

    塩原 匡貴; 矢吹 正教; 久慈 誠; 鷹野 敏明; 岡本 創

    2015年05月, 日本地球惑星科学連合2015年大会(幕張メッセ), ACG31-P05

  • Ground-based remote-sensing for clouds, aerosol and water vapor in Ny-Alesund, Svalbard and the GRENE Arctic campaign

    Shiobara, M; M. Yabuki; K. Ohora; M. Kuji; H. Okamoto; T. Takano; H. Kobayashi; M. Koike; J. Ukita

    2015年04月, ASSW2015 ISAR-4/ICARP III

    研究発表ペーパー・要旨(全国大会,その他学術会議)

  • C166 南極昭和基地及び北極ニーオルスンにおける雲の特徴(中高緯度大気,一般口頭発表)

    宮川 真友; 久慈 誠; 矢吹 正教; 塩原 匡貴

    日本気象学会, 2015年, 日本気象学会 大会講演予講集, 108, cinii_articles

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations

    KUJI Makoto; Risa FUJIMOTO; Mayu MIYAGAWA; Ryoko FUNADA; Masahiro HORI; Hiroshi KOBAYASHI; Seizi KOGA; Junji MATSUSHITA; Masataka SHIOBARA

    2015年, Proceedings of International Symposium on Space Technology and Science, pp.5

  • P122 地上観測から得られた南極昭和基地における雲量の変動(ポスター・セッション)

    宮川 真友; 竹岡 遼; 久慈 誠; 矢吹 正教; 塩原 匡貴

    日本気象学会, 2014年, 日本気象学会, 106, cinii_articles

  • C109 北極域における雲底高度と雲の放射強制力の関係(大気放射,口頭発表)

    竹岡 遼; 宮川 真友; 久慈 誠; 矢吹 正教; 塩原 匡貴

    日本気象学会, 2014年, 日本気象学会, 106, cinii_articles

  • Long-term monitoring of clouds and aerosols by ground-based remote sensing instruments operated by NIPR in Ny-Ålesund

    Shiobara, M; M. Kuji; M. Yabuki; H. Kobayashi; K. Aoki; T. Takano; H. Okamoto; M. Koike; J. Ukita

    2013年10月, 11th Ny-Ålesund Science Managers Committee Seminar

    研究発表ペーパー・要旨(国際会議)

  • D303 ニーオルスンにおける2011年春季集中観測期間の雲の特徴(中高緯度大気・相互作用,口頭発表)

    西中 規実子; 久慈 誠; 矢吹 正教; 塩原 匡貴

    日本気象学会, 2013年, 日本気象学会 大会講演予講集, 104, cinii_articles

  • Retrieval of cloud top and bottom heights using advanced Earth observing satellite / global imager (ADEOS-II / GLI) data

    Makoto Kuji

    An algorithm was developed to retrieve simultaneously the cloud optical thickness, effective particle radius, top height, geometrical thickness and then bottom height of a cloud layer with the spectral observation of visible, near infrared, thermal infrared, and oxygen A-band channels. The algorithm was applied to Advanced Earth Observing Satellite-II / Global Imager (ADEOS-II / GLI) dataset so as to retrieve global distribution of cloud geometrical properties. The retrieved results around Japan were compared with other observations such as ground-based active sensors and aircraft. It was found that the retrieved cloud base height was comparable, but underestimated by a few hundred meters from the ground-based active cloud radar observation even though there possibly existed a drizzling mode in the observed cloud system. The comparison suggests the algorithm works for water cloud system over ocean at least, while it is necessary to make further validation study with other studies such as ground-, space-based observations, and cloud resolving models. Based on this result, the algorithm was further applied to a global dataset and the initial result was obtained. © 2013 AIP Publishing LLC., 2013年, AIP Conference Proceedings, 1531, 336 - 339, doi

  • Relationship between trace gases and aerosols from biomass burning in Southeast Asia using satellite and emission data

    Yoshimi Azuma; Maya Nakamura; Makoto Kuji

    Southeast Asia is one of the biggest regions of biomass burning with forest fires and slash-and-burn farming. From the fire events, a large amount of air pollutants are emitted such as carbon monoxide (CO), nitrogen oxide (NOx) and aerosol (black carbon; BC). Biomass burning generally causes not only local, but also transboundary air pollution, and influences the atmospheric environment in the world accordingly. However, impact of air pollutants' emissions from large-scale fire in Southeast Asia has not been well investigated compared to other regions such as South America and Africa. In this study, characteristics of the atmospheric environment were investigated with correlative analyses among several satellite data (MOPITT, OMI, and MODIS) and emission inventory (GFEDv3) in Southeast Asia from October 2004 to June 2008 on a monthly basis. As a result, it is suggested that the transboundary air pollution from the biomass burning regions occurred over Southeast Asia, which caused specifically higher air pollutants' concentration at Hanoi, Vietnam in spring dry seasons., SPIE-INT SOC OPTICAL ENGINEERING, 2012年, REMOTE SENSING OF THE ATMOSPHERE, CLOUDS, AND PRECIPITATION IV, 8523, doi;web_of_science

  • DRAGON-West Japan campaign in 2012: Regional aerosol measurements over Osaka

    I. Sano; S. Mukai; B. N. Holben; M. Nakata; M. Yonemitsu; N. Sugimoto; T. Fujito; T. Hiraki; N. Iguchi; K. Kozai; M. Kuji; K. Muramatsu; Y. Okada; Y. Okada; Y. Sadanaga; S. Tohno; Y. Toyazaki; K. Yamamoto

    It is known that the aerosol distribution in Asia is complicated due to the increasing emissions of anthropogenic aerosols in association with economic growth and natural dust significantly varied with the seasons. Therefore it is clear that local spatially and temporally resolved measurements of atmospheric aerosols in Asian urban city are necessary. Since Osaka, Kobe, Kyoto, and Nara are located in very close each others (all cities are included in around 70x70 km(2) area). The population of the region is around 13 millions including neighbor prefectures, accordingly air quality in this region is slightly bad in comparison with the remote area. Furthermore, in recent years, Asian dusts and anthropogenic small particles some times transported from China and cover these cities throughout year. DRAGON (Distributed Regional Aerosol Gridded Observation Network) is a project of dense sun/sky radiometer network in the urban area. The DRAGON-West Japan field campaign was performed over Osaka and neighbor cities with 7 AERONET instruments from March to end of May in 2012. As results, DRAGON measurements indicate small differences among the values of AOT over Osaka region., SPIE-INT SOC OPTICAL ENGINEERING, 2012年, REMOTE SENSING OF THE ATMOSPHERE, CLOUDS, AND PRECIPITATION IV, 8523, doi;web_of_science

  • Relationship between trace gases and aerosols from biomass burning in Southeast Asia using satellite and emission data

    Yoshimi Azuma; Maya Nakamura; Makoto Kuji

    Southeast Asia is one of the biggest regions of biomass burning with forest fires and slash-and-burn farming. From the fire events, a large amount of air pollutants are emitted such as carbon monoxide (CO), nitrogen oxide (NOx) and aerosol (black carbon; BC). Biomass burning generally causes not only local, but also transboundary air pollution, and influences the atmospheric environment in the world accordingly. However, impact of air pollutants' emissions from large-scale fire in Southeast Asia has not been well investigated compared to other regions such as South America and Africa. In this study, characteristics of the atmospheric environment were investigated with correlative analyses among several satellite data (MOPITT, OMI, and MODIS) and emission inventory (GFEDv3) in Southeast Asia from October 2004 to June 2008 on a monthly basis. As a result, it is suggested that the transboundary air pollution from the biomass burning regions occurred over Southeast Asia, which caused specifically higher air pollutants' concentration at Hanoi, Vietnam in spring dry seasons., SPIE-INT SOC OPTICAL ENGINEERING, 2012年, REMOTE SENSING OF THE ATMOSPHERE, CLOUDS, AND PRECIPITATION IV, 8523, doi;web_of_science

  • DRAGON-West Japan campaign in 2012: Regional aerosol measurements over Osaka

    I. Sano; S. Mukai; B. N. Holben; M. Nakata; M. Yonemitsu; N. Sugimoto; T. Fujito; T. Hiraki; N. Iguchi; K. Kozai; M. Kuji; K. Muramatsu; Y. Okada; Y. Okada; Y. Sadanaga; S. Tohno; Y. Toyazaki; K. Yamamoto

    It is known that the aerosol distribution in Asia is complicated due to the increasing emissions of anthropogenic aerosols in association with economic growth and natural dust significantly varied with the seasons. Therefore it is clear that local spatially and temporally resolved measurements of atmospheric aerosols in Asian urban city are necessary. Since Osaka, Kobe, Kyoto, and Nara are located in very close each others (all cities are included in around 70x70 km(2) area). The population of the region is around 13 millions including neighbor prefectures, accordingly air quality in this region is slightly bad in comparison with the remote area. Furthermore, in recent years, Asian dusts and anthropogenic small particles some times transported from China and cover these cities throughout year. DRAGON (Distributed Regional Aerosol Gridded Observation Network) is a project of dense sun/sky radiometer network in the urban area. The DRAGON-West Japan field campaign was performed over Osaka and neighbor cities with 7 AERONET instruments from March to end of May in 2012. As results, DRAGON measurements indicate small differences among the values of AOT over Osaka region., SPIE-INT SOC OPTICAL ENGINEERING, 2012年, REMOTE SENSING OF THE ATMOSPHERE, CLOUDS, AND PRECIPITATION IV, 8523, doi;web_of_science

  • Comparison of Cloud Top Altitudes from Passive and Active Remote Sensors onboard ER-2 during TC4

    Makoto Kuji; Steven Platnick; Michael D. King; George T. Arnold; Gala Wind; Matthew McGill; William D. Hart; Dennis L. Hlavka; Robert E. Holz

    attitude is one of the key properties for the Earth radiation budget. There still exist large uncertainties on cloud altitude as well as optical and microphysical properties for high altitude clouds, in particular. Targeting the high altitude clouds around tropical tropopause transition layer (TTL), the Tropical Composition, Clouds and Climate Coupling (TC4) Experiment was carried out, based on Costa Rica during July and August 2007. In this campaign, NASA's high altitude airplane, ER-2, made remote sensing observation, and we obtained precious data with both passive and active remote sensors, such as Imager, Sounder, LIDAR, Radar, and so on. In this study, we compare cloud top altitudes using colocated datasets with Imager, LIDAR, and Sounder onboard the high altitude airplane. We have preliminary results, which are generally consistent with the former field campaign based on Hawaii during February and March 2003. We discuss the consistency between IR sounding and LIDAR backscattering measurements, and also show a result with respect to cloud optical and microphysical properties., AMER INST PHYSICS, 2009年, CURRENT PROBLEMS IN ATMOSPHERIC RADIATION (IRS 2008), 1100, 474 - +, doi;web_of_science

  • Retrieval of cloud, water, and aerosol properties using ADEOS-II/ GLI data

    久慈 誠; M. Kuji; N. Kikuchi; A. Uchiyama

    2009年, J. Remote Sens. Soc. Japan, 29, 70 - 73, doi

  • Overview and highlights of the ADEOS-II/GLI project

    久慈 誠; T. Nakajima; H. Murakami; M. Hori; T. Y. Nakajima; H. Yamamoto; J. Ishizaka; R. Tateishi; T. Aoki; T. Takamura; M. Kuji; D. D. Nguyen; A. Ono; S. Fukuda; K. Muramatsu

    2009年, J. Remote Sens. Soc. Japan, 29, 11 - 28, doi

  • Comparison of Cloud Top Altitudes from Passive and Active Remote Sensors onboard ER-2 during TC4

    Makoto Kuji; Steven Platnick; Michael D. King; George T. Arnold; Gala Wind; Matthew McGill; William D. Hart; Dennis L. Hlavka; Robert E. Holz

    attitude is one of the key properties for the Earth radiation budget. There still exist large uncertainties on cloud altitude as well as optical and microphysical properties for high altitude clouds, in particular. Targeting the high altitude clouds around tropical tropopause transition layer (TTL), the Tropical Composition, Clouds and Climate Coupling (TC4) Experiment was carried out, based on Costa Rica during July and August 2007. In this campaign, NASA's high altitude airplane, ER-2, made remote sensing observation, and we obtained precious data with both passive and active remote sensors, such as Imager, Sounder, LIDAR, Radar, and so on. In this study, we compare cloud top altitudes using colocated datasets with Imager, LIDAR, and Sounder onboard the high altitude airplane. We have preliminary results, which are generally consistent with the former field campaign based on Hawaii during February and March 2003. We discuss the consistency between IR sounding and LIDAR backscattering measurements, and also show a result with respect to cloud optical and microphysical properties., AMER INST PHYSICS, 2009年, CURRENT PROBLEMS IN ATMOSPHERIC RADIATION (IRS 2008), 1100, 474 - +, doi;web_of_science

  • Retrieval of cloud, water, and aerosol properties using ADEOS-II/ GLI data

    KUJI Makoto; M. Kuji; N. Kikuchi; A. Uchiyama

    2009年, J. Remote Sens. Soc. Japan, 29, 70 - 73, doi

  • Overview and highlights of the ADEOS-II/GLI project

    KUJI Makoto; T. Nakajima; H. Murakami; M. Hori; T. Y. Nakajima; H. Yamamoto; J. Ishizaka; R. Tateishi; T. Aoki; T. Takamura; M. Kuji; D. D. Nguyen; A. Ono; S. Fukuda; K. Muramatsu

    2009年, J. Remote Sens. Soc. Japan, 29, 11 - 28, doi

  • エアロゾルの光学特性に関する観測的研究(2.1.1.3 第3プロジェクト共同利用研究の内容と成果,2.1.1.共同利用プロジェクト研究の詳細,2.1.共同利用研究概観,[2] 共同利用研究)

    塩原 匡貴; 矢吹 正教; 小林 拓; 内山 明博; 山崎 明宏; 久慈 誠

    千葉大学, 2006年06月, 千葉大学環境リモートセンシング研究センター年報, 11, cinii_articles

  • 近紫外衛星観測による、秋季日本近海におけるエアロゾルの解析

    久慈 誠; 近藤 優美; 林田 佐智子; 塩原 匡貴; 矢吹 正教; 原 圭一郎; 早坂 忠裕

    日本気象学会, 2006年04月, 日本気象学会 大会講演予講集, 89, cinii_articles

  • しらせ船上観測データを用いた,秋季日本近海におけるエアロゾルの特徴

    久慈誠; 塩原匡貴; 矢吹正教; 小林拓; 内山明博; 山崎明宏

    2006年03月, CEReS環境リモートセンシングシンポジウム資料集, 8th, 109 - 113, j_global;url

  • Characteristics of sulfate haze over East Asia retrieved with satellite and ground-based remote sensing data

    Makoto Kuji; Sachiko Hayashida; Masataka Shiobara; Masanori Yabuki; Keiichiro Hara; Hiroshi Kobayashi; Tadahiro Hayasaka; Shinsuke Satake

    Optical observation around near UV spectral region potentially enables us to retrieve light absorbing features of aerosol, such as type as well as optical thickness. We analyzed near UV observation data to identify haze properties around Japan in the autumn of 2003, using Global Imager onboard Advanced Earth Observing Satellite-II (ADEOS-II/GLI), which has 380nm and 400nm window channels. At the same time, we had optical observation, such as a ground-based LIDAR measurement and a shipborne skyradiometer measurement, so as to retrieve vertical profile, particle sphericity, particle size distribution, and optical thickness of the haze.Based upon the three kinds of analyses with remotely sensed data, such as satellite, LIDAR, and skyradiometer, we have the following characteristics of the haze: little UV absorbing, of optical thickness 0.5 (around 500nm), within lower boundary layer (less than around 1km a.s.l.), and of spherical and fine particles (0.2 mu m in radius).We also have some direct sampling measurements onboard Research Vessel Shirase, such as integrated nephelometer, particle soot/absorption photometer, and optical particle counter, so as to identify optical and microphysical properties of the haze as well as chemical composition analyses. The results of the surface direct sampling showed the dense haze dominantly consisted of smaller (0.2 mu m in radius) and sulfate particulates, which is consistent to the remotely sensed results.Backward trajectory simulations also indicate that the hazy air mass had arrived from/through some mega cities over East Asia. Further, we are going to investigate the consistency between optical, microphysical, chemical, and dynamical aspects using a chemical transport model., SPIE-INT SOC OPTICAL ENGINEERING, 2006年, REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS, 6408, doi;web_of_science

  • Retrieval of cloud geometrical properties using ADEOS-II/GLI data for radiation budget studies

    久慈 誠; M. Kuji; T. Nakajima

    2006年, Proceedings of SPIE, 5979, doi

  • ADEOS-II 衛星搭載GLIセンサは大気の何を見てきたか

    久慈 誠; 中島 孝; 中島 映至; 日暮 明子; 菊地 信行; 久慈 誠

    2006年, 日本リモートセンシング学会誌, 26 (1), 33 - 36, doi

  • Characteristics of sulfate haze over East Asia retrieved with satellite and ground-based remote sensing data

    Makoto Kuji; Sachiko Hayashida; Masataka Shiobara; Masanori Yabuki; Keiichiro Hara; Hiroshi Kobayashi; Tadahiro Hayasaka; Shinsuke Satake

    Optical observation around near UV spectral region potentially enables us to retrieve light absorbing features of aerosol, such as type as well as optical thickness. We analyzed near UV observation data to identify haze properties around Japan in the autumn of 2003, using Global Imager onboard Advanced Earth Observing Satellite-II (ADEOS-II/GLI), which has 380nm and 400nm window channels. At the same time, we had optical observation, such as a ground-based LIDAR measurement and a shipborne skyradiometer measurement, so as to retrieve vertical profile, particle sphericity, particle size distribution, and optical thickness of the haze.Based upon the three kinds of analyses with remotely sensed data, such as satellite, LIDAR, and skyradiometer, we have the following characteristics of the haze: little UV absorbing, of optical thickness 0.5 (around 500nm), within lower boundary layer (less than around 1km a.s.l.), and of spherical and fine particles (0.2 mu m in radius).We also have some direct sampling measurements onboard Research Vessel Shirase, such as integrated nephelometer, particle soot/absorption photometer, and optical particle counter, so as to identify optical and microphysical properties of the haze as well as chemical composition analyses. The results of the surface direct sampling showed the dense haze dominantly consisted of smaller (0.2 mu m in radius) and sulfate particulates, which is consistent to the remotely sensed results.Backward trajectory simulations also indicate that the hazy air mass had arrived from/through some mega cities over East Asia. Further, we are going to investigate the consistency between optical, microphysical, chemical, and dynamical aspects using a chemical transport model., SPIE-INT SOC OPTICAL ENGINEERING, 2006年, REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS, 6408, doi;web_of_science

  • Atmospheric Environment Observed by GLI Aboard ADEOS-II

    KUJI Makoto; Takashi Y. NAKAJIMA; Teruyuki NAKAJIMA; Akiko HIGURASHI; Nobuyuki KIKUCHI; Makoto KUJI

    2006年, J. Remote Sens. Soc. Japan, 26 (1), 33 - 36, doi

  • GLIセンサの紫外波長観測データを用いた黄砂の推定

    山中 のり子; 久慈 誠; 林田 佐智子; 安井 元昭; 内山 明博; 山崎 明宏

    日本気象学会, 2005年05月15日, 大会講演予講集, 87, cinii_articles

  • C160 船上及び衛星観測による、秋季日本近海におけるヘイズの特徴(物質循環II)

    久慈 誠; 近藤 優美; 林田 佐智子; 塩原 匡貴; 矢吹 正教

    日本気象学会, 2005年, 日本気象学会 大会講演予講集, 88, cinii_articles

  • Retrieval of Asian Dust Amount over Land using ADEOS-II/GLI near UV Data

    Makoto Kuji; Noriko Yamanaka; Sachiko Hayashida; Motoaki Yasui; Akihiro Uchiyama; Akihiro Yamazaki; Teruo Aoki

    We propose a retrieval method of Asian dust (Yellow sand or Kosa aerosol) columnar amount around source regions using a near ultraviolet radiometry observation from space. The method simultaneously retrieves an optical thickness and mode radius of Kosa aerosol, and then derives its columnar amount. The method was applied to ADEOS-II/GLI data in the spring of 2003 around Taklimakan desert source region, inland China. The retrieved optical thickness and mode radius were about 0.34 and 1.75 mu m, respectively, at a validation site. They are comparable to the in situ observations conducted within the framework of ADEC project. The estimated columnar amount around a validation site is about 2.77 g m(-2), which seems reasonable under a relatively calm situation. The method should be further validated with a regional model simulation study, and then it is useful to monitor Asian dust around source regions from space in the future., METEOROLOGICAL SOC JPN, 2005年, SOLA, 1, 33 - 36, doi;web_of_science

  • Retrieval of Asian dust amount over land using ADEOS-II / GLI near UV data

    Makoto Kuji; Noriko Yamanaka; Sachiko Hayashida; Akihiro Yamazaki; Akihiro Uchiyama

    We propose a retrieval method of Asian dust (Yellow sand or Kosa aerosol) columnar amount around source regions using a near ultraviolet radiometry observation from space. The method simultaneously retrieves an optical thickness and mode radius of Kosa aerosol, and then derives its columnar amount. The method was applied to ADEOS-II / GLI data in the spring of 2003 around Taklimakan desert source region, inland China. The retrieved optical thickness and mode radius were about 0.34 and 1.75 μm, respectively, at a validation site. They are comparable to the in situ observations conducted within the framework of ADEC project. The estimated columnar amount around a validation site is about 2.77 g m-2, which seems reasonable under a relatively calm situation. The method should be further validated with a regional model simulation study, and then it is useful to monitor Asian dust around source regions from space in the future., 2005年, Proceedings of SPIE - The International Society for Optical Engineering, 5890, 1 - 8, doi

  • Retrieval of Asian Dust Amount over Land using ADEOS-II/GLI near UV Data

    Makoto Kuji; Noriko Yamanaka; Sachiko Hayashida; Motoaki Yasui; Akihiro Uchiyama; Akihiro Yamazaki; Teruo Aoki

    We propose a retrieval method of Asian dust (Yellow sand or Kosa aerosol) columnar amount around source regions using a near ultraviolet radiometry observation from space. The method simultaneously retrieves an optical thickness and mode radius of Kosa aerosol, and then derives its columnar amount. The method was applied to ADEOS-II/GLI data in the spring of 2003 around Taklimakan desert source region, inland China. The retrieved optical thickness and mode radius were about 0.34 and 1.75 mu m, respectively, at a validation site. They are comparable to the in situ observations conducted within the framework of ADEC project. The estimated columnar amount around a validation site is about 2.77 g m(-2), which seems reasonable under a relatively calm situation. The method should be further validated with a regional model simulation study, and then it is useful to monitor Asian dust around source regions from space in the future., METEOROLOGICAL SOC JPN, 2005年, SOLA, 1, 33 - 36, doi;web_of_science

  • Retrieval of Asian dust amount over land using ADEOS-II / GLI near UV data

    Makoto Kuji; Noriko Yamanaka; Sachiko Hayashida; Akihiro Yamazaki; Akihiro Uchiyama

    We propose a retrieval method of Asian dust (Yellow sand or Kosa aerosol) columnar amount around source regions using a near ultraviolet radiometry observation from space. The method simultaneously retrieves an optical thickness and mode radius of Kosa aerosol, and then derives its columnar amount. The method was applied to ADEOS-II / GLI data in the spring of 2003 around Taklimakan desert source region, inland China. The retrieved optical thickness and mode radius were about 0.34 and 1.75 μm, respectively, at a validation site. They are comparable to the in situ observations conducted within the framework of ADEC project. The estimated columnar amount around a validation site is about 2.77 g m-2, which seems reasonable under a relatively calm situation. The method should be further validated with a regional model simulation study, and then it is useful to monitor Asian dust around source regions from space in the future., 2005年, Proceedings of SPIE - The International Society for Optical Engineering, 5890, 1 - 8, doi

  • Retrieval of cloud geometrical properties using ADEOS=II/GLI data for radiation budget studies

    Makoto Kuji; Teruyuki Nakajima

    Clouds play a crucial role in the climate system. The investigation of their radiative properties on the cloud optical, microphysical, and geometrical characteristics is of great interest. Here, top height, base height, and geometrical thickness of cloud layer are considered as cloud geometrical properties. Several studies show that information of some spectral regions including oxygen A-band, enables us to retrieve the cloud geometrical properties as well as the optical thickness and the effective particle radius of cloud. In this study, an algorithm was developed to retrieve simultaneously the cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer with the spectral information of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to ADEOS-II / GLI. For the preparation of global analysis, we look into the look up tables for the sensitivity of cloud optical thickness, particle size, top height, and geometrical thickness. This study will expand to the global analysis and is anticipated to contribute to the earth climate studies in terms of cloud optical, microphysical, and geometrical properties., 2005年, Proceedings of SPIE - The International Society for Optical Engineering, 5979, doi

  • 紫外域観測人工衛星データを用いた対流圏エアロゾルの推定と検証

    山中 のり子; 久慈 誠; 林田 佐智子; 安井 元昭; 内山 明博; 山崎 明宏; 青木 輝夫

    日本気象学会, 2004年10月06日, 大会講演予講集, 86, cinii_articles

  • 紫外域観測衛星センサによる対流圏エアロゾル観測手法における誤差の検討

    久慈 誠; 芝田由香里; 蒲生京佳; 山中のり子; 久慈誠; 林田佐智子

    2004年, 日本リモートセンシング学会誌, 24, 387 - 397, doi

  • Retrieval of precipitable water using ADEOS-II/GLI near infrared data

    M Kuji; N Kikuchi; A Uchiyama

    Retrieval of vertically integrated water vapor amount (precipitable water) is proposed using near infrared channels of Global Imager onboard Advanced Earth Observing Satellite-II (GLI/ADEOS-II). The principle of retrieval algorithm is based upon that adopted with Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Earth Observing System (EOS) satellite series. Simulations were carried out with GLI Signal Simulator (GSS) to calculate the radiance ratio between water vapor absorbing bands and non-absorbing bands. As a result, it is found that for the case of high spectral reflectance background (a bright target) such as the land surface, the calibration curves are sensitive to the precipitable water variation. It turns out that aerosol loading has little influence on the retrieval over a bright target for the aerosol optical thickness less than about 1.0 at 500 nm wavelength. A preliminary analysis of GLI data was also carried out and the retrieved result is discussed. It is also anticipated that simultaneous retrieval of the water vapor amount using GLI data along with other channels will lead to improved accuracy of the determination of surface geophysical properties, such as vegetation, ocean color, and snow and ice, through the better atmospheric correction., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, PASSIVE OPTICAL REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS IV, 5652, 106 - 115, doi;web_of_science

  • Retrieval of cloud geometrical properties using ADEOS-II/GLI data

    M Kuji; T Nakajima

    Clouds play a crucial role in the climate system. The investigation of their radiative properties on the cloud optical, microphysical, and geometrical characteristics is of great interest. Here, top height, base height, and geometrical thickness of cloud layer are considered as cloud geometrical properties. Several studies show that information of some spectral regions including oxygen A-band, enables us to retrieve the cloud geometrical properties as well as the optical thickness and the effective particle radius of cloud. In this study, an algorithm is presentted to retrieve simultaneously the cloud optical thickness.. effective particle radius, top height, and geometrical thickness of cloud layer with the spectral information of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to ADEOS-II/GLI dataset so as to retrieve global distribution of cloud geometrical properties. The retrieved results around Japan are validated with in situ observations. The retrieved and in-situ observed values are comparable in order of magnitude, but it is necessary to investigate the results in detail to improve the algorithm. This study will expand to the global analysis and is anticipated to contribute to the earth climate studies in terms of cloud optical, microphysical, and geometrical properties., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE IX, 5571, 20 - 29, doi;web_of_science

  • Retrieval of cloud geometrical properties using satellite remote sensing data

    M Kuji; T Nakajima; S Mukai

    It is of great interest to investigate the radiative features on the cloud optical, microphysical, and geometrical properties of clouds that play crucial role in the climate system. Here, top height, base height, and geometrical thickness of cloud layer are considered as cloud geometrical proper-ties. Previous studies show that information of some spectral regions including oxygen A-band, enables us to retrieve cloud geometrical properties as well as optical thickness, effective particle radius of cloud. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer with the spectral information of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to the GLI dataset on board ADEOS-II satellite that has been launched recently. The preliminary results are not so strange and to be validated in future, comparing to the in-situ observations., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE VIII, 5235, 15 - 24, doi;web_of_science

  • An Error Analysis of a Method for Retrieval of Tropospheric Aerosols Using UV Satellite Sensor

    KUJI Makoto; Yukari Shibata; Kyoka Gamo; Noriko Yamanaka; Makoto Kuji; Sachiko Hayashida

    2004年, J. Remote Sens. Soc. Japan, 24, 387 - 397, doi

  • Retrieval of precipitable water using ADEOS-II/GLI near infrared data

    M Kuji; N Kikuchi; A Uchiyama

    Retrieval of vertically integrated water vapor amount (precipitable water) is proposed using near infrared channels of Global Imager onboard Advanced Earth Observing Satellite-II (GLI/ADEOS-II). The principle of retrieval algorithm is based upon that adopted with Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Earth Observing System (EOS) satellite series. Simulations were carried out with GLI Signal Simulator (GSS) to calculate the radiance ratio between water vapor absorbing bands and non-absorbing bands. As a result, it is found that for the case of high spectral reflectance background (a bright target) such as the land surface, the calibration curves are sensitive to the precipitable water variation. It turns out that aerosol loading has little influence on the retrieval over a bright target for the aerosol optical thickness less than about 1.0 at 500 nm wavelength. A preliminary analysis of GLI data was also carried out and the retrieved result is discussed. It is also anticipated that simultaneous retrieval of the water vapor amount using GLI data along with other channels will lead to improved accuracy of the determination of surface geophysical properties, such as vegetation, ocean color, and snow and ice, through the better atmospheric correction., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, PASSIVE OPTICAL REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS IV, 5652, 106 - 115, doi;web_of_science

  • Retrieval of cloud geometrical properties using ADEOS-II/GLI data

    M Kuji; T Nakajima

    Clouds play a crucial role in the climate system. The investigation of their radiative properties on the cloud optical, microphysical, and geometrical characteristics is of great interest. Here, top height, base height, and geometrical thickness of cloud layer are considered as cloud geometrical properties. Several studies show that information of some spectral regions including oxygen A-band, enables us to retrieve the cloud geometrical properties as well as the optical thickness and the effective particle radius of cloud. In this study, an algorithm is presentted to retrieve simultaneously the cloud optical thickness.. effective particle radius, top height, and geometrical thickness of cloud layer with the spectral information of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to ADEOS-II/GLI dataset so as to retrieve global distribution of cloud geometrical properties. The retrieved results around Japan are validated with in situ observations. The retrieved and in-situ observed values are comparable in order of magnitude, but it is necessary to investigate the results in detail to improve the algorithm. This study will expand to the global analysis and is anticipated to contribute to the earth climate studies in terms of cloud optical, microphysical, and geometrical properties., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE IX, 5571, 20 - 29, doi;web_of_science

  • Retrieval of cloud geometrical properties using satellite remote sensing data

    M Kuji; T Nakajima; S Mukai

    It is of great interest to investigate the radiative features on the cloud optical, microphysical, and geometrical properties of clouds that play crucial role in the climate system. Here, top height, base height, and geometrical thickness of cloud layer are considered as cloud geometrical proper-ties. Previous studies show that information of some spectral regions including oxygen A-band, enables us to retrieve cloud geometrical properties as well as optical thickness, effective particle radius of cloud. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer with the spectral information of visible, near infrared, thermal infrared, and oxygen A-band channels. This algorithm was applied to the GLI dataset on board ADEOS-II satellite that has been launched recently. The preliminary results are not so strange and to be validated in future, comparing to the in-situ observations., SPIE-INT SOC OPTICAL ENGINEERING, 2004年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE VIII, 5235, 15 - 24, doi;web_of_science

  • The availability of precipitable water retrieval using split-window data

    M Kuji; Okada, I; A Uchiyama; T Takamura

    Water vapor is one of the most significant green house effect gases. A monitoring of water vapor behavior with operational satellite is important to investigate the global changes. Water vapor usually exists at lower troposphere. However, precipitable water is a key property to comprehend the variation since sometimes humid air mass moves to the upper troposphere. Using split window channel data with optical sensors such as AVHRR and VISSR, several retrieval algorithm has been proposed and among them, transmittance ratio method has been often utilized. However, the approach is still controversial because some studies concluded it was available and others not. We investigated the availability of the method with split window channels' data of GMS-5/VISSR on a semi-continental scale. A calibration curve of the precipitable water with radiosonde observation had been made in course of the retrieval procedure. However, the calibration curve are hardly sensitive to the precipitable water. Numerical simulations were carried out for the possible condition, and it turned out that calibration was insensitive to precipitable water under some condition at all: larger water water variation for a given surface temperature range within a given region. The results of a feasibility study will be discussed., SPIE-INT SOC OPTICAL ENGINEERING, 2003年, APPLICATIONS WITH WEATHER SATELLITES, 4895, 129 - 136, doi;web_of_science

  • Retrieval of cloud geometrical properties using optical remote sensing data

    M Kuji; T Nakajima; S Mukai

    It is of great interest to investigate the properties on the cloud optical, microphysical, and geometrical parameters, in particular, of low-level marine clouds which play crucial influence on the global climate system. Top height, base height, and geometrical thickness of cloud layer are considered here as cloud geometrical parameters. These parameters are very important to retrieve, because top and base heights are the factors which govern the strength of greenhouse effect through the thermal radiation from to cloud layer, whereas the geometrical thickness is the key parameter for the estimation of gaseous absorption in cloud layer where multiple scattering process dominates. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer from the spectral information of visible, near infrared, thermal infrared, and oxygen A band channels. This algorithm was applied to FIRE (First ISCCP Regional Experiment, 1987) airborne data which included the above four channels and targeted at the low-level marine clouds off the coast of California in summer. The retrieved results seems to be comparable to the in situ microphysical observation although further validation studies are required for the cloud geometrical parameters in particular., SPIE-INT SOC OPTICAL ENGINEERING, 2003年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE VII, 4882, 194 - 204, doi;web_of_science

  • The availability of precipitable water retrieval using split-window data

    M Kuji; Okada, I; A Uchiyama; T Takamura

    Water vapor is one of the most significant green house effect gases. A monitoring of water vapor behavior with operational satellite is important to investigate the global changes. Water vapor usually exists at lower troposphere. However, precipitable water is a key property to comprehend the variation since sometimes humid air mass moves to the upper troposphere. Using split window channel data with optical sensors such as AVHRR and VISSR, several retrieval algorithm has been proposed and among them, transmittance ratio method has been often utilized. However, the approach is still controversial because some studies concluded it was available and others not. We investigated the availability of the method with split window channels' data of GMS-5/VISSR on a semi-continental scale. A calibration curve of the precipitable water with radiosonde observation had been made in course of the retrieval procedure. However, the calibration curve are hardly sensitive to the precipitable water. Numerical simulations were carried out for the possible condition, and it turned out that calibration was insensitive to precipitable water under some condition at all: larger water water variation for a given surface temperature range within a given region. The results of a feasibility study will be discussed., SPIE-INT SOC OPTICAL ENGINEERING, 2003年, APPLICATIONS WITH WEATHER SATELLITES, 4895, 129 - 136, doi;web_of_science

  • Retrieval of cloud geometrical properties using optical remote sensing data

    M Kuji; T Nakajima; S Mukai

    It is of great interest to investigate the properties on the cloud optical, microphysical, and geometrical parameters, in particular, of low-level marine clouds which play crucial influence on the global climate system. Top height, base height, and geometrical thickness of cloud layer are considered here as cloud geometrical parameters. These parameters are very important to retrieve, because top and base heights are the factors which govern the strength of greenhouse effect through the thermal radiation from to cloud layer, whereas the geometrical thickness is the key parameter for the estimation of gaseous absorption in cloud layer where multiple scattering process dominates. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer from the spectral information of visible, near infrared, thermal infrared, and oxygen A band channels. This algorithm was applied to FIRE (First ISCCP Regional Experiment, 1987) airborne data which included the above four channels and targeted at the low-level marine clouds off the coast of California in summer. The retrieved results seems to be comparable to the in situ microphysical observation although further validation studies are required for the cloud geometrical parameters in particular., SPIE-INT SOC OPTICAL ENGINEERING, 2003年, REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE VII, 4882, 194 - 204, doi;web_of_science

  • Retrieval of precipitable water using near infrared channels of Global Imager / Advanced Earth Observing Satellite-II (GLI / ADEOS-II)

    久慈 誠

    2002年, J. Remote Sens. Soc. Japan, 22, 149-162., doi

  • Retrieval of cloud geometrical parameters using remote sensing data

    久慈 誠; Makoto Kuji; Teruyuki Nakajima

    2002年, 11th Conference on Cloud Physics, American Meteorological Society, 1 - 9

  • Retrieval of precipitable water using near infrared channels of Global Imager / Advanced Earth Observing Satellite-II (GLI / ADEOS-II)

    KUJI Makoto

    2002年, J. Remote Sens. Soc. Japan, 22, 149-162., doi

  • Retrieval of cloud geometrical parameters using remote sensing data

    KUJI Makoto; Makoto Kuji; Teruyuki Nakajima

    2002年, 11th Conference on Cloud Physics, American Meteorological Society, 1 - 9

  • 昭和基地受信NOAA衛星HRPTデータの読み出しツールの開発

    久慈 誠; 久慈誠; 菊地信行

    2001年, 南極資料, 45 (3), 353 - 361

  • A method of cloud field detection over Antarctica during the polar night using AVHRR data

    久慈 誠; Makoto Kuji; Nobuyuki Kikuchi; Naohiko Hirasawa; Takashi Yamanouchi

    2001年, Polar Meteorol. and Glaciol., 15, 114-123.

  • Retrieval of cloud geometrical parameters using remote sensing data

    M Kuji; T Nakjima

    It is of great interest to investigate the properties on the cloud optical: microphysical, and geometrical parameters, in particular, of low-level marine clouds which play crucial influence on the global climate system. Top height: base height, and geometrical thickness of cloud layer are considered here as cloud geometrical parameters. These parameters are very important to retrieve, because top and base heights are the factors which govern the strength of greenhouse effect through the thermal radiation from / to cloud layer, whereas the geometrical thickness is the key parameter for the estimation of gaseous absorption in cloud layer where multiple scattering process dominates. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer from the spectral information of visible, near infrared, thermal infrared, and oxygen A band channels. This algorithm was applied to FIRE (First ISCCP Regional Experiment, 1987) airborne data which included the above four channels and targeted at the low-level marine clouds off the coast of California in summer. The retrieved results seems to be comparable to the in situ microphysical observation although further validation studies are required for the cloud,geometrical parameters in particular., SPIE-INT SOC OPTICAL ENGINEERING, 2001年, OPTICAL REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS II, 4150, 225 - 234, doi;web_of_science

  • A method of cloud field detection over Antarctica during the polar night using AVHRR data

    KUJI Makoto; Makoto Kuji; Nobuyuki Kikuchi; Naohiko Hirasawa; Takashi Yamanouchi

    2001年, Polar Meteorol. and Glaciol., 15, 114-123.

  • Retrieval of cloud geometrical parameters using remote sensing data

    M. Kuji; T. Nakajima

    It is of great interest to investigate the properties on the cloud optical, microphysical, and geometrical parameters, in particular, of low-level marine clouds which play crucial influence on the global climate system. Top height, base height, and geometrical thickness of cloud layer are considered here as cloud geometrical parameters. These parameters are very important to retrieve, because top and base heights are the factors which govern the strength of greenhouse effect through the thermal radiation from/to cloud layer, whereas the geometrical thickness is the key parameter for the estimation of gaseous absorption in cloud layer where multiple scattering process dominates. In this study, an algorithm was developed to retrieve simultaneously cloud optical thickness, effective particle radius, top height, and geometrical thickness of cloud layer from the spectral information of visible, near infrared, thermal infrared, and oxygen A band channels. This algorithm was applied to FIRE (First ISCCP Regional Experiment, 1987) airborne data which included the above four channels and targeted at the low-level marine clouds off the coast of California in summer. The retrieved results seems to be comparable to the in situ microphysical observation although further validation studies are required for the cloud geometrical parameters in particular., 2001年, Proceedings of SPIE - The International Society for Optical Engineering, 4150, 225 - 234, doi

  • The retrieval of effective particle radius and liquid water path of low-level marine clouds from NOAA AVHRR data

    M Kuji; T Hayasaka; N Kikuchi; T Nakajima; M Tanaka

    An algorithm was developed to retrieve both the optical thickness and the effective particle radius of low-level marine clouds simultaneously from National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer (AVHRR) data. The algorithm uses the combination of the visible (channel 1) and the middle-infrared (channel 3) reflected radiation. The thermal component in the middle infrared was corrected with the thermal-infrared (channel 4) radiance by a statistical technique using a regressive formula. The liquid water path (i.e., vertically integrated liquid water content) was also estimated as a by-product. The algorithm was applied to AVHRR datasets for which almost-synchronized airborne observations were conducted around the First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment (FIRE) and the Western North Pacific Experiment (WENPEX) regions. The two regions are different in the characteristics of cloud fields: summer stratus and stratiform clouds that result from outbreaks of cold air mass over the warm sea in winter seasons, respectively. In the FIRE region. the retrieved parameters are almost consistent with those of in situ airborne observations. even when using a more practical approach than the algorithms adopted in previous studies, but there is still a discrepancy between the satellite-derived results and those of in situ airborne observations around the drizzle-dominated portion. In the WENPEX region, it is suggested that cloud fractional coverage in a pixel may cause error in the retrieval, particularly for horizontally inhomogeneous cloud held analyses with an assumption of a plane-parallel atmospheric model. It is found also that the thermal-infrared information has a potential to estimate the inhomogeneity of cloud fields as a result of the comparison between stratus and broken cloud cases., AMER METEOROLOGICAL SOC, 2000年07月, JOURNAL OF APPLIED METEOROLOGY, 39 (7), 999 - 1016, doi;web_of_science

  • The retrieval of effective particle radius and liquid water path of low-level marine clouds from NOAA AVHRR data

    KUJI Makoto; Makoto Kuji; Tadahiro Hayasaka; Nobuyuki Kikuchi; Teruyuki Nakajima; Masayuki Tanaka

    2000年, J. Appl. Meteor., 39, 999-1016., doi

  • Optimization of the Advanced Earth Observing Satellite II Global Imager channels by use of radiative transfer calculations

    TY Nakajima; T Nakajima; M Nakajima; H Fukushima; M Kuji; A Uchiyama; M Kishino

    The channel specifications of the Global Imager onboard the Advanced Earth Observing Satellite II have been determined by extensive numerical experiments. The results show that there is an optimum feasible position for each ocean color channel. The bandwidth of the 0.763-mu m channel should be less than 10 nm for good sensitivity to the cloud top height and geometric thickness of the cloud layer; a 40-nm bandwidth is suitable fcr the 1.38-mu m channel to have the strongest contrast between cloudy and clear radiance with a sufficient radiant energy; and a 3.7-mu m channel is better than a 3.95-mu m channel for estimation of the sea surface temperature (SST) and determination of the cloud particle size when the bandwidth of the channel is 0.33 mu m. In A three-wavelength combination of 6.7, 7.3, and 7.5 mu m is an optimized choice for water vapor profiling. The combination of 8.6, 10.8, and 12.0 mu m is suitable for cloud microphysics and SST retrievals with the split-window technique. (C) 1998 Optical Society of America., OPTICAL SOC AMER, 1998年05月, APPLIED OPTICS, 37 (15), 3149 - 3163, web_of_science

  • Optimization of the Advanced Earth Observing Satellite II Global Imager channels by use of radiative transfer calculations

    TY Nakajima; T Nakajima; M Nakajima; H Fukushima; M Kuji; A Uchiyama; M Kishino

    The channel specifications of the Global Imager onboard the Advanced Earth Observing Satellite II have been determined by extensive numerical experiments. The results show that there is an optimum feasible position for each ocean color channel. The bandwidth of the 0.763-mu m channel should be less than 10 nm for good sensitivity to the cloud top height and geometric thickness of the cloud layer; a 40-nm bandwidth is suitable fcr the 1.38-mu m channel to have the strongest contrast between cloudy and clear radiance with a sufficient radiant energy; and a 3.7-mu m channel is better than a 3.95-mu m channel for estimation of the sea surface temperature (SST) and determination of the cloud particle size when the bandwidth of the channel is 0.33 mu m. In A three-wavelength combination of 6.7, 7.3, and 7.5 mu m is an optimized choice for water vapor profiling. The combination of 8.6, 10.8, and 12.0 mu m is suitable for cloud microphysics and SST retrievals with the split-window technique. (C) 1998 Optical Society of America., OPTICAL SOC AMER, 1998年05月, APPLIED OPTICS, 37 (15), 3149 - 3163, web_of_science

  • AIR TRUTH VALIDATION OF CLOUD ALBEDO ESTIMATED FROM NOAA ADVANCED VERY HIGH-RESOLUTION RADIOMETER DATA

    T HAYASAKA; M KUJI; M TANAKA

    A comparison was carried out between cloud albedos observed in situ by aircraft and cloud albedos calculated with visible optical thickness retrieved from the NOAA advanced very high resolution radiometer channel 1 radiance data. The results show that the observed and calculated cloud albedos in the visible region are coincident with each other in a few percent for both homogeneous stratus and rather inhomogeneous stratocumulus clouds as long as the cloud amount is large. In the near-infrared region, on the other hand, the observed albedo is lower than that evaluated from the satellite data for stratocumulus clouds, while the observed and calculated albedos are consistent for stratus clouds. From the aircraft observation of solar radiative flux this discrepancy is not ascribed to the uncertainty in the near-infrared absorption processes as discussed in previous studies., AMER GEOPHYSICAL UNION, 1994年09月, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 99 (D9), 18685 - 18693, doi;web_of_science

  • Satellite remote sensing and air-truth validation of cloud liquid water path and droplet effective radius

    久慈 誠; Tadahiro Hayasaka; Makoto Kuji; Teruyuki Nakajima; Masayuki Tanaka

    1994年, Eighth Conference on Atmospheric Radiation

  • AIR TRUTH VALIDATION OF CLOUD ALBEDO ESTIMATED FROM NOAA ADVANCED VERY HIGH-RESOLUTION RADIOMETER DATA

    T HAYASAKA; M KUJI; M TANAKA

    A comparison was carried out between cloud albedos observed in situ by aircraft and cloud albedos calculated with visible optical thickness retrieved from the NOAA advanced very high resolution radiometer channel 1 radiance data. The results show that the observed and calculated cloud albedos in the visible region are coincident with each other in a few percent for both homogeneous stratus and rather inhomogeneous stratocumulus clouds as long as the cloud amount is large. In the near-infrared region, on the other hand, the observed albedo is lower than that evaluated from the satellite data for stratocumulus clouds, while the observed and calculated albedos are consistent for stratus clouds. From the aircraft observation of solar radiative flux this discrepancy is not ascribed to the uncertainty in the near-infrared absorption processes as discussed in previous studies., AMER GEOPHYSICAL UNION, 1994年09月, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 99 (D9), 18685 - 18693, doi;web_of_science

  • Satellite remote sensing and air-truth validation of cloud liquid water path and droplet effective radius

    KUJI Makoto; Tadahiro Hayasaka; Makoto Kuji; Teruyuki Nakajima; Masayuki Tanaka

    1994年, Eighth Conference on Atmospheric Radiation

  • Retrieval of Asian dust amount over land using ADEOS-II/GLI near UV data

    M Kuji; N Yamanaka; S Hayashida

    PERGAMON-ELSEVIER SCIENCE LTD, 2005年05月, GEOCHIMICA ET COSMOCHIMICA ACTA, 69 (10), A257 - A257, web_of_science

    研究発表ペーパー・要旨(国際会議)

  • Characterization of Asian aerosols at Fukue-jima island using in-situ observation and remote sensing data

    Hibino, M; Y. Inoue; M. Kuji; S. Hayashida; T. Hayasaka

    2008年11月, Proc. 14th CEReS Int'l Symposium and SKYNET Workshop on "Remote Sensing of the Atmosphere for Better Understanding of Climate Change", 18 - 21

  • GLI atmosphere sciences

    TY Nakajima; N Kikuchi; T Nakajima; T Takamura; A Higurashi; M Kuji

    This paper overviews the scientific activities of the ADEOS-II (Midori-II) GLI atmosphere project. The GLI version 2 standard products had been released since November 2004, The optical and microphysical properties of aerosols and clouds were retrieved as the standard products by use of originally developed GLI data analysis system. The cloud flag and the cloud amounts with statistical values were also obtained from GLI data analysis. In addition, the precipitable water over land area using three shortwave infrared channels was newly provided from the version 2. For the research activities of the GLI sciences, the aerosols over the land area are detected by use of GLI near UV channel. In this, paper. we will show and discuss the atmospheric features appeared in the GLI products, introduce a new standard product, and validation Status of the cloud and aerosol properties., IEEE, 2005年, IGARSS 2005: IEEE International Geoscience and Remote Sensing Symposium, Vols 1-8, Proceedings, 4189 - 4192, web_of_science

  • A study of cloud variation over Antarctica using remote sensing data.

    Kuji,M; Kikuchi,N; Hirasawa,N; Yamanouchi,T

    2001年, Polar Meteorol. Glaciol., 15, 114 - 123

  • Satellite remote sensing of water vapor, cloud and rainfall in the Asian Monsoon region.

    Hayasaka, T; I. Takizawa; M. Kuji

    1995年03月, Proceedings of 2nd International Study Conference on GEWEX in Asia and GAME, 6-10 March 1995, Pattaya, Thailand, 512 - 515

  • Air-truth validation of cloud albedo estimated from NOAA AVHRR data.

    Hayasaka, T; M. Kuji; M. Tanaka

    1993年10月, Extended Abstracts of International WCRP Symposium, Japanese National Committee for WCRP and Nagoya University, Nagoya, Japan, 7.38 - 7.41

書籍等出版物

  • 北極ニーオルスン基地開設25周年と将来展望

    創文印刷工業株式会社, 2017年

  • 南極氷床と大気物質循環・気候

    日本気象学会, 2017年 (ISBN: 9784904129166)

  • SKYNET特別号

    学術図書印刷, 2014年

  • Special Issue on SKYNET

    Gakujutsu-tosho Printing Co., 2014年

  • 大気と微粒子の話 エアロゾルと地球環境

    京都大学学術出版会, 2008年

講演・口頭発表等

  • 地上光学観測データ解析による奈良盆地のエアロゾルの研究

    久慈誠

    AERONET集中観測J-ALPS事前打ち合わせ会, 2020年02月14日, 2020年02月14日

    口頭発表(一般)

  • 地上光学観測による奈良盆地におけるエアロゾルの研究

    久慈誠

    第22回 環境リモートセンシングシンポジウム, 2020年02月20日, 2020年02月20日

    ポスター発表

  • 地上観測データ解析による奈良におけるエアロゾルと気象要素の関係

    神谷美里

    日本気象学会春季大会, 2020年05月19日, 2020年05月19日

    ポスター発表

  • 船舶観測と衛星観測プロダクトによる雲量の研究

    中辻菜穂

    日本気象学会春季大会, 2020年05月19日, 2020年05月19日

    ポスター発表

  • 船舶搭載型全天カメラによる海洋上の雲量の推定

    廣瀬沙羅

    日本気象学会春季大会, 2020年05月21日, 2020年05月21日

    ポスター発表

  • しらせ搭載全天カメラ観測による雲量の変動

    久慈誠

    第23回 南極エアロゾル研究会, 2020年07月27日, 2020年07月27日

    口頭発表(一般)

  • 船舶観測と衛星観測による雲量の比較検証

    中辻菜穂

    日本気象学会秋季大会, 2020年10月28日, 2020年10月28日

    ポスター発表

  • 地上観測データ解析による奈良におけるエアロゾルと気象要素の研究

    神谷美里

    日本気象学会秋季大会, 2020年10月30日, 2020年10月30日

    ポスター発表

  • Cloud fractions estimated from satellite and shipboard observations

    Naho Nakatsuji

    The 11th Symposium on Polar Science, 2020年12月03日, 2020年12月03日

    ポスター発表

  • Characteristics of cloud fraction from whole-sky camera and ceilometer observations onboard R/V Shirase during JARE 61

    Sara Hirose

    The 11th Symposium on Polar Science, 2020年12月03日, 2020年12月03日

    ポスター発表

  • Cloud fractions estimated from shipboard and satellite observations between East Asia and Antarctica

    Makoto KUJI

    American Geophysical Union Fall Meeting 2020, 2020年12月08日, 2020年12月08日

    ポスター発表

  • Retrieval and validation of cloud geometrical properties

    Makoto KUJI

    The Joint PI Meeting of JAXA Earth Observation Missions FY2019, 2020年01月22日, 2020年01月22日

    口頭発表(一般)

  • 地上光学観測による奈良盆地におけるエアロゾルの研究

    神谷美里

    第23回 環境リモートセンシングシンポジウム, 2021年02月18日, 2021年02月18日

    ポスター発表

  • Retrieval and validation of cloud geometrical properties

    Makoto KUJI

    The Joint PI Meeting of JAXA Earth Observation Missions FY2020, 2021年01月21日, 2021年01月21日

    ポスター発表

  • Retrieval and validation of cloud geometrical properties

    平成29年地球観測ミッション合同PIワークショップ, 2018年

  • 奈良における地上光学観測データ解析によるエアロゾルの経年変化

    第20回CEReS環境リモートセンシングシンポジウム, 2018年

  • 船舶搭載型全天カメラ観測データ解析による雲量の推定

    日本気象学会春季大会, 2018年

  • Cloud Measurements with an All-sky Camera System for Investigating Long-term Variability of Cloud Properties at South Pole

    NOAA ESRL Global Monitoring Annual Conference 2018, 2018年

  • Retrieval and validation of cloud geometrical properties

    Joint PI Meetings of Global Environmental Observation Mission FY2017, 2018年

  • Cloud Measurements with an All-sky Camera System for Investigating Long-term Variability of Cloud Properties at South Pole

    NOAA ESRL Global Monitoring Annual Conference 2018, 2018年

  • Retrieval and validation of cloud geometrical properties

    平成28年地球環境観測ミッション合同PIワークショップ, 2017年

  • リモートセンシングによる大気微粒子の観測

    第6回イオン移動度研究会, 2017年

  • 船舶観測データ解析による雲の研究

    日本気象学会春季大会, 2017年

  • 奈良における地上光学観測データ解析によるエアロゾルの経年変化

    日本気象学会秋季大会, 2017年

  • しらせ搭載全天カメラ及び雲底高度計によって観測された雲量の特徴

    第8回極域科学シンポジウム, 2017年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations between East Asia and Antarctica

    AGU Fall Meeting 2017, 2017年

  • Retrieval and validation of cloud geometrical properties

    Joint PI Workshop Global Environmental Observation Mission, 2017年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations between East Asia and Antarctica

    AGU Fall Meeting 2017, 2017年

  • Retrieval and validation of cloud geometrical properties

    平成27年地球環境観測ミッション合同PIワークショップ, 2016年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations between Japan and Antarctica

    International Radiation Symposium (IRS) 2016, 2016年

  • Challenging the New Remote-Sensing of Aerosols and Clouds from Surface at the Polar Sites

    The 22nd International Symposium on Polar Sciences (ISPS), 2016年

  • 奈良におけるエアロゾルの微物理特性と気象要素の関係

    日本気象学会春季大会, 2016年

  • しらせ搭載全天カメラ観測による雲量の特徴

    第7回極域科学シンポジウム, 2016年

  • Retrieval and validation of cloud geometrical properties

    Joint PI Workshop Global Environmental Observation Mission, 2016年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations between Japan and Antarctica

    International Radiation Symposium (IRS) 2016, 2016年

  • Challenging the New Remote-Sensing of Aerosols and Clouds from Surface at the Polar Sites

    The 22nd International Symposium on Polar Sciences (ISPS), 2016年

  • Annual variation of the cloud fraction and base height at Ny-Ålesund with ground-based observations

    The Twelfth Ny-Ålesund Seminar, 2015年

  • The interannual change of cloud and the radiative contribution at Ny-Ålesund

    The Twelfth Ny-Ålesund Seminar, 2015年

  • Atmospheric visibility variation over the Chinese continent from 1957 to 2005

    The First Asian Conference on Meteorology, 2015年

  • Optical properties of aerosols determined from shipboard sky radiometry observation

    The First Asian Conference on Meteorology, 2015年

  • 南極昭和基地及び北極ニーオルスンにおける雲の特徴

    日本気象学会秋季大会, 2015年

  • エアロゾルの光学観測による視程の検証

    日本気象学会秋季大会, 2015年

  • 船舶搭載型測器観測データ解析による雲の特徴

    日本気象学会秋季大会, 2015年

  • 船舶太陽放射観測から得られた海上エアロゾルの光学特性

    日本気象学会秋季大会, 2015年

  • 南極昭和基地及び北極ニーオルスンにおける雲の変動

    第6回極域科学シンポジウム, 2015年

  • しらせ船上スカイラジオメータ観測から得られたエアロゾルの光学特性

    第6回極域科学シンポジウム, 2015年

  • 船舶搭載型全天カメラ観測データを用いた雲量の推定

    第6回極域科学シンポジウム, 2015年

  • Optical properties of marine aerosols from shipboard skyradiometer observation between Japan and Australia

    23rd CEReS International Symposium, 2015年

  • Characteristics of Aerosols with ground-based optical observation at Nara, Japan

    23rd CEReS International Symposium, 2015年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations

    AGU Fall Meeting 2015, 2015年

  • Annual variation of the cloud fraction and base height at Ny-Ålesund with ground-based observations

    The Twelfth Ny-Ålesund Seminar, 2015年

  • The interannual change of cloud and the radiative contribution at Ny-Ålesund

    The Twelfth Ny-Ålesund Seminar, 2015年

  • Atmospheric visibility variation over the Chinese continent from 1957 to 2005

    The First Asian Conference on Meteorology, 2015年

  • Optical properties of aerosols determined from shipboard sky radiometry observation

    The First Asian Conference on Meteorology, 2015年

  • Optical properties of marine aerosols from shipboard skyradiometer observation between Japan and Australia

    23rd CEReS International Symposium, 2015年

  • Characteristics of Aerosols with ground-based optical observation at Nara, Japan

    23rd CEReS International Symposium, 2015年

  • Cloud fractions estimated from shipboard whole-sky camera and ceilometer observations

    AGU Fall Meeting 2015, 2015年

  • 船舶搭載型全天カメラ観測データ解析による海洋上の雲量の推定

    久慈 誠; 高田 真奈; 廣瀬 沙羅; 中辻 菜穂; 堀 雅裕

    日本気象学会春季大会, 2021年05月19日

  • 地上光学観測による奈良盆地におけるエアロゾルの研究

    久慈 誠; 横田 青奈; 中川 真友; 山田 奈直; 下出 有実; 高田 真奈; 神谷 美里

    第23回 環境リモートセンシングシンポジウム, 2021年02月18日

所属学協会

  • 米国地球物理連合

  • アメリカ気象学会

  • 日本地球惑星科学連合

  • 日本大気化学研究会

  • 日本リモートセンシング学会

  • 日本気象学会

  • American Geophysics Union

  • Japan Geoscience Union

  • The Japan Society of Atmospheric Chemistry

Works(作品等)

  • しらせ搭載全天カメラ観測による南極航海中の雲の出現特性

    2013年 - 2015年

  • Cloud fraction with an All-sky camera onboard R/V Shirase

    2013年 - 2015年

  • 大気微粒子観測

    2013年

  • Aerosol observation

    2013年

  • 地球観測衛星から推定されたエアロゾルのしらせ船上観測との比較検証

    2011年 - 2012年

  • 雲頂・雲底高度推定アルゴリズムの開発

    2009年 - 2012年

  • SKYNETデータを用いた衛星観測大気プロダクトの検証

    2009年 - 2011年

  • 地球観測衛星から推定されたエアロゾル・雲の比較検証研究

    2009年 - 2010年

  • アジアにおける水田・牧畜活動の大気環境負荷の研究 〜宇宙観測とフィールド観測の融合を目指して〜

    2009年 - 2010年

  • 赤外リモートセンシングデータを用いた大気水蒸気量の推定

    2007年 - 2009年

  • エアロゾルの光学特性に関する観測的研究

    2007年 - 2009年

  • TC4観測キャンペーンで取得されたリモートセンシングデータの解析

    2007年05月 - 2008年03月

  • リモートセンシングデータを用いた南極域における水蒸気・雲変動の研究

    2006年 - 2008年

  • 熱帯大気組成ー雲ー気候結合ミッション

    2007年07月 - 2007年08月

  • Tropical Composition, Cloud and Climate Coupling (TC4)

    2007年07月 - 2007年08月



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