| Project/Area Number |
15310012
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Nagoya University |
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Principal Investigator |
MATSUNAGA Katsuji Nagoya University, Graduate School of Environmental Studies, Associate Professor, 大学院・環境学研究科, 助教授 (60022729)
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| Co-Investigator(Kenkyū-buntansha) |
IWASAKA Yasunobu Kanazawa University, Institute of Nature and Environmental Technology, Professor, 自然計測応用研究センター, 教授 (20022709)
TASAKA Shigeki Gifu University, Information and Multimedia Center, Professor, 総合情報メディアセンター, 教授 (60155059)
SHIOBARA Masataka National Institute of Polar Research, Center for Antarctic Environment Monitoring, Associate Professor, 南極圏環境モニタリング研究センター, 助教授 (60291887)
MORIMOTO Shinji National Institute of Polar Research, Arctic Environment Research Center, Research Associate, 北極圏環境研究センター, 助手 (30270424)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2004: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2003: ¥10,900,000 (Direct Cost: ¥10,900,000)
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| Keywords | Antarctica / Environmental Change / Transport / Aerosol / Rn / CO / Syowa Station / Size distribution / 対流圏物質輸送 / 中・低緯度の影響 / 南極昭和基地 / 大気中エアロゾルの形態 / 有機エアロゾル / 大気中のラドン / 大気中のCO / 大気化学 / 大気エアロゾル / 長距離輸送 / 海洋大気 |
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| Research Abstract |
Atmospheric observations in this study at Syowa Station, Antarctica include measurements of number-size distribution (ca.5 〜 5000 nm) of aerosol particles, soot concentrations, and collections of size-segregated aerosol samples for chemical analysis etc. Atmospheric Rn and CO concentrations were also measured as tracers of air transport from mid to low latitudes. In addition to year round observation at Syowa Station, atmospheric observations using a ship (Shirase) and an airplane (PC-6) were also conducted to obtain spatial distribution of aerosols.
Temporal variations of soot and Rn concentrations imply sporadic transport of air masses from mid latitudes during winter and spring associated with migration of low pressure systems. Aerosol concentrations were always high during blizzard conditions with vigorous winds. Aerosol events under calm wind condition were newly found in winter. Aerosol particles having a mode diameter less than 20 nm were observed for several times from late spring to late summer.
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