2011 Fiscal Year Final Research Report
Statistical study of atmospheric conditions causing heavy rainfall and snow fall
Project/Area Number |
21540456
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Meteorology/Physical oceanography/Hydrology
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Research Institution | Japan, Meteorological Research Institute |
Principal Investigator |
INOUE Hanako 気象庁気象研究所, 気象衛星・観測システム研究部, 研究官 (20442741)
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Co-Investigator(Kenkyū-buntansha) |
NAKAI Sento 独立行政法人防災科学技術研究所, 雪氷防災研究センター, 総括主任研究員 (20360365)
TSUGUTI Hiroshige 気象庁気象研究所, 予報研究部, 研究官 (90553165)
|
Research Collaborator |
KATO Teruyuki 気象庁, 予報部数値予報課, 数値予報モデル開発推進官
HIROKAWA Yasutaka 気象庁, 予報部予報課, 技術専門官
|
Project Period (FY) |
2009 – 2011
|
Keywords | 集中豪雨 / 豪雪 / 雲解像数値モデル / 気象レーダー |
Research Abstract |
Suitable height for the judgment of favorable atmospheric conditions causing heavy rainfall around Japan is suggested to be 500 meters, not 850 hPa(~1500 meters) that has been often used, from the statistical results of objective analysis data and cloud-resolving models. This study also shows suitable factors for the judgment are equivalent potential temperature and water vapor flux amounts at a 500 meter height, and their threat hold values are objectively estimated for each season and several regions around Japan. Statistical comparisons of radar observations for a month during a heavy snowfall revealed that preferable atmospheric conditions differ between snowfall systems, possibly resulting in the difference of snowfall distributions.
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Research Products
(46 results)
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[Remarks] 1.2010年7月国土交通no.104 :集中豪雨・局地的大雨(ゲリラ豪雨)はなぜ発生するのか
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[Remarks] 2.2010年梅雨号季刊そら(季刊誌):梅雨前線帯で豪雨が発生するしくみ
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[Remarks] 3.2009年8月26日発売Newton(月刊誌):続発する集中豪雨に警戒を発生のメカニズムは?命を守る最善の選択とは?
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[Remarks] 4.2009年8月3日発売AERA(週刊誌),集中豪雨の発生要因について
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[Remarks] 5.2009年8月2日放送(録画)サンデーモーニング(TBS)
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[Remarks] 6.2009年7月29日放送(生出演)クローズアップ現代(NHK)
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[Remarks] 7.2009年6月21日付しんぶん赤旗日曜版、豪雨の発生メカニズムについて