Simultaneous retrievals of aerosols and clouds, aerosol indirect effect investigation, and validation of Himawari 8 products
| Project/Area Number |
17K05650
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 雲 / エアロゾル / 光学的厚さ / 有効半径 / アルゴリズム開発 / 衛星雲プロダクット検証 / 地上観測 / 検証 / ひまわり８号 / スカイラジオメーター / 衛星雲プロダクトの検証 / 衛星観測 / 衛星 / アルゴリズム / 間接効果 / ひまわり8号 |
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| Outline of Final Research Achievements |
An algorithm to retrieve cloud optical thickness (COD) and cloud-particle effective radius (CER) for both water and ice clouds from surface observed spectral zenith radiance by a ground-based sky radiometer was developed. The effects of several factors, including aerosols, on retrieved parameters were evaluated. Except for thin clouds (COD < 15), the retrieval errors are very small for both COD and CER. The proposed algorithm was used to estimate COD and CER of high temporal resolution. Those data were then used to study cloud properties of different sites and seasons of different aerosol backgrounds as well as to validate satellite cloud products.
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| Academic Significance and Societal Importance of the Research Achievements |
雲は気候システムに重要な役割を果たしています。しかし、その雲の時空間変動が大きく、気候変動に関する政府間パネル（IPCC）第６次報告書等にも明記されているように、その雲は気候変動予測における最大の不確実要素の一つとなっている。このような中、本研究の成果は特に、地上測機による新規な雲観測技術の開発とその地上観測資料を用いた衛星雲プロダクットの精度評価は、雲特性のより正確な理解のため波及効果をもたらすことを期待される。
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Report
(5 results)
Research Products
(40 results)
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[Journal Article] An overview of and issues with sky radiometer technology and SKYNET2020
Author(s)
Nakajima T., Campanelli M., Che H., Estells V., Irie H., Kim S., Kim J., Liu D., Nishizawa T., Pandithurai G., Soni V. K., Thana B., Tugjsurn N., Aoki K., Go S., Higurashi A., Kazadzis S., Khatri P., Kouremeti N., Kudo R., Marenco F., Momoi M., Ningombam S. S., Ryder C. L., Uchiyama A
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Journal Title
Atmos. Meas. Tech.
Volume: 13
Issue: 8
Pages: 4195-4218
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] High-resolution retrieval of cloud microphysical properties and surface solar radiation using Himawari-8/AHI next-generation geostationary satellite2020
Author(s)
Letu, H., K. Yang, T. Y. Nakajima, H. Ishimoto, T. M. Nagao, J. Riedi, A. J. Baran, R. Ma, T. Wang, H. Shang, P. Khatri, L. Chen, C. Shi, and J. Shi
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Journal Title
Remote Sensing of Environment
Volume: 239
Pages: 111583-111583
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Comparisons of spectral aerosol absorption in Seoul, South Korea2018
Author(s)
Jungbin Mok, Nickolay A. Krotkov, Omar Torres, Hiren Jethva, Zhanqing Li, Jhoon Kim, Ja-Ho Koo, Sujung Go, Hitoshi Irie, Gordon Labow, Thomas F. Eck, Brent N. Holben, Jay Herman, Robert P. Loughman, Elena Spinei, Seoung Soo Lee, Pradeep Khatri, and Monica Campanelli
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Journal Title
Atmospheric Measurement Techniques
Volume: -
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Cloud remote sensing using ground-based sky radiometer: Towards generating high-resolution data and satellite product validation2019
Author(s)
P.Khatri, H. Iwabuchi, T Hayasaka, H. Irie, T. Takamura, A. Yamazaki, A. Damiani, H. Letu, and Q. Kai
Organizer
P.Khatri, H. Iwabuchi, T Hayasaka, H. Irie, T. Takamura, A. Yamazaki, A. Damiani, H. Letu, and Q. Kai
Related Report
Int'l Joint Research / Invited
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