| Project/Area Number |
09304044
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Institute of Low Temperature Science, Hokkaido University |
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Principal Investigator |
TAKEUCHI Kensuke Hokkaido Univ., Inst.of Low Temp.Sci., Prof., 低温科学研究所, 教授 (00107450)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAZAKI Koji Hokkaido Univ., Grad.School of Environ.Sci., Prof., 大学院・地球環境科学研究科, 教授 (70270791)
TOYOTA Takenobu Hokkaido Univ., Inst.of Low Temp. Sci., Inst., 低温科学研究所, 助手 (80312411)
ENDO Tatsuo Hokkaido Univ., Inst.of Low Temp.Sci., Asso.Prof., 低温科学研究所, 助教授 (20001844)
TACHIBANA Yoshihiro Tokai Univ., Res.Inst.of Civilization, Lec., 文明研究所, 講師 (10276785)
藤吉 康志 北海道大学, 低温科学研究所, 教授 (40142749)
中村 健治 名古屋大学, 大気水圏科学研究所, 教授 (20262917)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥20,600,000 (Direct Cost: ¥20,600,000)
Fiscal Year 1999: ¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1998: ¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1997: ¥8,300,000 (Direct Cost: ¥8,300,000)
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| Keywords | sea ice / Sea of Okhotsk / heat flux / Rawinsonde / air-sea interaction / winter monsoon / オホーツク / 気団変質 / 海面フラックス / 界面フラックス |
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| Research Abstract |
In order to investigate the effect of sea ice on the heat and moisture exchange between atmosphere and ocean, modification of air mass is observed over the sea ice area in the Sea of Okhotsk. Rawin sonde observations are carried out at Shari-cho on the Okhotsk coast of Hokkaido Island and on the ice-break vessel "Soya" of Japan Hydrographic Office, for several weeks in the season sea ice coverage increases in the southern part of the Sea of Okhotsk. The vertical profile of temperature and humidity measured by those observations at cold air out-break events are compared with that at Juzhno-sakhalinsk which locates at the upper stream of the wind. Increase of heat and moisture in the surface mixed layer is evaluated and the heat and moisture flux from the sea surface are estimated. Analysis shows that increase of sea ice concentration over the pass of the air mass tend to reduce the development of mixed layer in the lower atmosphere and the heat and moisture flux from the sea surface.
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