2023 Fiscal Year Research-status Report
Moisture sources and isotopic composition of the Meiyu-Baiu rainfall in East Asia
| Project/Area Number |
23K19068
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| Research Institution | Kyushu University |
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Principal Investigator |
李 肖陽 九州大学, 理学研究院, 助教 (80983501)
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| Project Period (FY) |
2023-08-31 – 2025-03-31
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| Keywords | Meiyu-Baiu rainfall / moisture source / isotopic composition / East Asia / Heavy rainfall |
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| Outline of Annual Research Achievements |
Stable water isotopes have been widely used to investigate the moisture sources and hydrological processes based on limited ground-based observations. In this project, we combine isotopic field observation and numerical simulation to investigate the major moisture sources and their corresponding moisture transport and thermodynamic processes with respect to large-scale circulations for Meiyu-Baiu rainfall.
Moisture sources and isotopic composition of the 2020 heavy Meiyu-Baiu rainfall in East Asia have beed investigated based on the isotopic observations and the IsoRSM simulations.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
Difference and similarity of moisture sources and isotopic composition between the 2020 Kumamoto heavy rainfall and the 2020 Yangtze River valley heavy Meiyu-Baiu rainfall have been investigated. These new results have been published in Atmospheric Research (Atmos Res. 2024, 297, 107114), and presented in the 2023 MSJ autumn meeting in Sendai.
The last 20-year simulations of moisture sources and isotopic composition of Meiyu-Baiu rainfall in Southwestern Japan is going on.
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| Strategy for Future Research Activity |
The last 20-year (2004-2023) simulations of moisture sources and isotopic composition of Meiyu-Baiu rainfall in Southwestern Japan is going on. The new results will be presented in JpGU and the MSJ spring meeting in May 2024.
A second paper is also planned to clarify the interannual variations of moisture sources and isotopic composition of the Meiyu-Baiu rainfall in southwest Japan.
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| Causes of Carryover |
The incurring amount will be used for Article Costs, Travel Expenses, and Miscellaneous of the project, together with the grant requested for the next fiscal year.
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