1989 Fiscal Year Final Research Report Summary
Studies of the Land- and Sea-Breeze and its Effect on the Pollen
| Project/Area Number |
63580197
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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 |
自然地理学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
FUKUOKA Yoshitaka Hiroshima Univ., Faculty of Integrated Arts and Sciences, Professor, 総合科学部, 教授 (00007361)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Hideo Hiroshima Univ., Faculty of Integrated Arts and Sciences, Research Associate, 総合科学部, 助手 (40202155)
NAKAKOSHI Nobukazu Hiroshima Univ., Faculty of Integrated Arts and Sciences, Research Associate, 総合科学部, 助手 (50188918)
YASUDA Yoshinori International Japan Research Center, Assoc.Prof., 助教授 (50093828)
NEHIRA Kunito Hiroshima Univ., Faculty of Integrated Arts and Sciences, Professor, 総合科学部, 教授 (40034582)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Structure of land- and sea-breeze / Meso-scale sea-breeze / Tide / Pollen / Anti-sea-breeze / Charcoal / Inversion of air temperature / Heat island |
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| Research Abstract |
I. Basic studies on the structure of the land- and sea-breeze: Especially the three dimensional structure of the land-breeze was clarified not only as a local-scale breeze but also as a meso-scale one by the pilotballoon methods. According to the piltballoon observations and data analysis, meso-scale sea-breezes were caused by the local depression in the inland area, and the land-breeze direction was modified by the tide.
II. Relationship between the land- and sea-breeze circulation and the pollen distribution: The pollen observation made it concluded that the SUGI(cryptomeria) pollen brought about to the central part of the sea (the Hiroshima Bay) by the anti-sea-breeze(upper land-breeze) in daytime was blown back to the island of the Bay center in nighttime. The pollen was proven to be a good tracer as an air pollution analysis.
III. The Effect of the land- and sea-breeze on the air pollution and urban climate: It was concluded that the combination of the land-breeze and the temperature inversion made the air polluted and that the land- and sea-breeze can transfers the heat-island core as well as the air polluted area.
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