| Project/Area Number |
07640564
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
ENDOH Tatsuo Hokkaido Univ., Inst.Low Temp.Sci.Asc.Pro., 低温科学研究所, 助教授 (20001844)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Tsuneya Hokkaido Edcl.Univ.Asc.Pro., 教育実践センター, 助教授 (60236297)
KODAMA Yuji Hokkaido Univ., Inst.Low Temp.Sci.Res.Asc., 低温科学研究所, 助手 (70186708)
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| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | acid snow / aerosol / depositional growth / SO42- / graupl / rimed crystal / NO3- / riming growth / 酸性雪 / 雪片 / レーダー |
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| Research Abstract |
Case studies of chemical analysis of solid precipitation were carried out at sites on the outskirts and central part of Sapporo City, Japan to investigate the difference in precipitation chemistry owing to the mechanism by which snow particles grow, i.e.by vapor deposition or by riming. Even in vapor depositional growth, the samples were found to be acidic. NO_3-and nss-Cl-contributed to the acidification. In the samples of riming growth, the nss-SO^2_-concentration was considerably high. Snow samples from the site in the central city area were less acidic due to the higher concentration of nss-Ca^<2+> in the early period of snowfalls.
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