2011 Fiscal Year Final Research Report
Dynamic climatology of precipitation around Japan with attention to the daily precipitation systems in relation to the seasonal cycle of large-scale climate systems
| Project/Area Number |
21300336
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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 |
Geography
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| Research Institution | Okayama University |
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Principal Investigator |
KATO Kuranoshin 岡山大学, 大学院・教育学研究科, 教授 (90191981)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKAMOTO Osamu 岡山大学, 大学院・自然科学研究科, 教授 (40027298)
TAKAHASHI Masaaki 東京大学, 大気海洋研究所, 教授 (70188051)
NINOMIYA Kozo 海洋研究開発機構, 地球環境領域, 特任上席研究員 (60292950)
SATO Naoki 東京学芸大学, 自然科学系, 講師 (90392935)
TAKAHASHI Nobutoq 宮城大学, 食産業学部, 助教 (90422328)
IINO Naoko 熊本大学, 教育学部, 准教授 (80284909)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 気候 / 東アジアの気象気候 / 気候変動 / 降水の動気候学 / 東アジア前線帯 / 季節サイクル |
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| Research Abstract |
Seasonal cycle of the precipitation climatology and its year-to-year variation around the Japan were analyzed, with special attention to appearance tendency of the daily precipitation systems and effects of the phase differences in the seasonal march among the large-scale Asian monsoon subsystems near Japan. The present study reveals that the Baiu precipitation has decreased after~ 2000 in the northwestern Kyushu, where the heavy rainfall events frequently appear climatologically, greatly reflected by the decrease in the heavy rainfall days. The detailed features on the rainfall characteristics in the "Aki-Same"(autumn rainfall) season, long-term change of the wintertime precipitation, and evolutions of the precipitation and the synoptic-scale systems during late autumn~ midwinter~ early spring have also been found.
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