Investigation of detailed water cycle processes in atmosphere and land surface using stable water isotope data assimilation system
| Project/Area Number |
26289160
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Hydraulic engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Yoshimura Kei 東京大学, 生産技術研究所, 准教授 (50376638)
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| Co-Investigator(Kenkyū-buntansha) |
金 元植 国立研究開発法人農業環境技術研究所, 大気環境研究領域, 主任研究員 (40414502)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
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| Keywords | 水同位体比 / 気候プロキシ / 千年再解析 / 蒸発散フラックス / データ同化 / 陸面過程 / 成分分離 / 蒸散寄与率 / 水安定同位体 / 大気大循環モデル / 陸面過程モデル / 地球水循環 / 水安定同位体比 / 分校分析 / 気候復元 / 大気循環 / 分光分析 |
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| Outline of Final Research Achievements |
In this project, we developed a new vapor isotope continuous measurement system to understand the land water cycle process in more detail. Compared to conventional mass spectrometric methods, by using laser spectroscopic technique, it is possible to increase the measurement frequency and precision of vapor isotope and moreover to dramatically improve the estimation precision and time resolution of the evapotranspiration isotope and transpiration fraction. Furthermore, due to portability and ease of management, it was succeeded in acquiring continuous data over three years from the test observation paddy. Based on the results, we developed a transpiration fraction estimation method applicable to the whole world, and estimated the value of 57±7% as the global mean. Regarding the transpiration fraction, various values were published ranging 20% to 90% in the past few years, which was a big controversy, but the value based on this observation data may settle the dispute.
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Report
(4 results)
Research Products
(49 results)
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[Journal Article] 平成27年9月関東・東北豪雨による茨城県常総市における鬼怒川洪水に関する調査及び考察2016
Author(s)
芳村 圭, 中村晋一郎, 鳩野美佐子, 向田清峻, 石塚悠太, 内海信幸, 木口雅司, 金炯俊, 乃田啓吾, 牧野達哉, 鼎信次郎, 沖大幹
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Journal Title
土木学会論文集B1(水工学)
Volume: 72
NAID
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] The GRENE-TEA Model Intercomparison Project (GTMIP): overview and experiment protocol for Stage 12015
Author(s)
S. Miyazaki, K. Saito, J. Mori, T. Yamazaki, T. Ise, H. Arakida, T. Hajima, Y. Iijima, H. Machiya, T. Sueyoshi, H. Yabuki, E. J. Burke, M. Hosaka, K. Ichii, H. Ikawa, A. Ito, A. Kotani, Y. Matsuura, M. Niwano, T. Nitta, R. Oishi, T. Ohta, H. Park, T. Sasai, A. Sato, H. Sato, A. Sugimoto, R. Suzuki
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Journal Title
Geoscientific Model Development
Volume: 8
Issue: 9
Pages: 2841-2856
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Late-glacial to late-Holocene shifts in global precipitation δ18O2015
Author(s)
Jasechko, S., A. Lechler, F. S. R. Pausata, P. J. Fawcett, T. Gleeson, D. I. Cendón, J. Galewsky, A. N. LeGrande, C. Risi, Z. D. Sharp, J. M. Welker, M. Werner, and K. Yoshimura,
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Journal Title
Clim. Past
Volume: 11
Issue: 10
Pages: 1375-1393
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Paired oxygen isotope records reveal modern North American atmospheric dynamics during the Holocene2014
Author(s)
Liu, Z., Yoshimura, K., Bowen G. J., Buenning, N. H., Risi C., Welker, J. M. and Yuan, F.
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Journal Title
Nature Communications
Volume: N/A
Issue: 1
DOI
Related Report
Peer Reviewed
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