2005 Fiscal Year Final Research Report Summary
Dry deposition of atmospheric aerosols and its impacts to atmospheric environment
| Project/Area Number |
14048210
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | National Institute for Environmental Studies (2004-2005)
Shizuoka University (2002-2003) |
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Principal Investigator |
OHARA Toshimasa National Institute for Environmental Studies, PM2.5 & DEPResearch Project, Team Leader, PM2・5・DEP研究プロジェクト, 総合研究官 (80313930)
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| Co-Investigator(Kenkyū-buntansha) |
SENO Tadachika Shizuoka University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60135241)
UCHIYAMA Masahiro National Institute for Environmental Studies, Atmospheric Environmental Division, Senior Researcher, 大気圏環境研究領域, 主任研究員 (20160294)
IZUMI Katsuyuki Toyo University, Faculty of Engineering, Professor, 工学部, 教授 (70132842)
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| Project Period (FY) |
2002 – 2005
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| Keywords | atmospheric aerosols / Asia / dry deposition / REA method / numerical simulation / future projection |
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| Research Abstract |
The dry deposition of atmospheric aerosols was investigated using field observation and model simulation in East Asia.
A new experimental technique for measuring dry deposition flux of aerosol particles was developed based on the relaxed eddy accumulation (REA) method. Using this measurement system, the dry deposition velocity of atmospheric aerosols was investigated under the several meteorological conditions in the grassland and snow field.
A series of model simulation using three types of chemical transport model (HYPACT, and CMAQ) coupled with a meteorological model (RAMS) has been conducted to analysis the dynamics of atmospheric aerosols in East Asia.
RAMS/HYPACT could reproduce the temporal and spatial distributions of concentration and deposition for sulfur and nitrogen. Source-receptor relationships using by RAMS/HYPACT demonstrated that annual sulfur and nitrogen deposition in Japan was 49 % and 34 % from China, respectively. Additionally, the future acid deposition over East Asia in 2020 was predicted by the RAMS/CMAQ modeling system.
We will continue our research in the following directions. (1) validate the aerosol dry deposition measurement system via further observations, (2) validate our RAMS/CMAQ using the dataset by field observation groups.
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