| Project/Area Number |
01540344
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
気象・海洋・陸水学
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| Research Institution | Faculty of Science, Kochi University |
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Principal Investigator |
CHIBA Osamu Faculty of Science, Associate Professor, 理学部, 助教授 (00036576)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1989: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Sea Breeze Front / Ultra-Sonic Anemometer-Thermometer / Doppler Sodar / Wind Shear / Sureace Layer / Eddy Motion / Frontal Width / Penetration Time of Sea Breeze / リモ-トセンシング / シンプレックス法 / 海風の進入(侵入)時刻 / ファクシミル画像 / サ-マルプル-ム / ソ-ダ / 回転運動 / 煙の実験 / ホドグラフ / 斜投象 |
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| Research Abstract |
The observation of the sea breeze has been carried out in the Atmospheric Boundary-Layer Observatory (ABO) of Kochi University during the period from 1986 to 1991. The two main measuring equipments ([1]Sonic Anemometer-Thermometer (SAT) and[2]Doppler sodar) were used to investigate the penetration time of sea breeze and the turbulent structure of the surface layer affected by the sea breeze pnetration.
The empirical formulae of the penetration time obtained by both SAT and Sodar, after a harmonic analysis, indicate clear seasonal variation and strongly related to variation in sun rise time.
Sea breeze front often occasion some of the strong wind shear at the surface, reflecting the large downdraft (before front penetration) and updraft (after front penetration). These flows also effect the turbulence quantities such as the scale of turbulence and the dissipation of turbulent kinetic energy.
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