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  1. 防災科研関係論文

Assessment of Ocean Surface Winds and Tropical Cyclones around Japan by RCMs

https://nied-repo.bosai.go.jp/records/5514
https://nied-repo.bosai.go.jp/records/5514
971596a7-fab1-4a5b-af7f-e14e055dede6
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Assessment of Ocean Surface Winds and Tropical Cyclones around Japan by RCMs
言語
言語 eng
著者 Satoshi Iizuka

× Satoshi Iizuka

en Satoshi Iizuka

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Koji Dairaku

× Koji Dairaku

en Koji Dairaku

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Wataru Sasaki

× Wataru Sasaki

en Wataru Sasaki

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Sachiho A. Adachi

× Sachiho A. Adachi

en Sachiho A. Adachi

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Noriko N. Ishizaki

× Noriko N. Ishizaki

en Noriko N. Ishizaki

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Hiroyuki Kusaka

× Hiroyuki Kusaka

en Hiroyuki Kusaka

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Izuru Takayabu

× Izuru Takayabu

en Izuru Takayabu

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抄録
内容記述タイプ Other
内容記述 This study assesses ocean surface winds in regional climate models (RCMs) and evaluates the ability of RCMs to downscale the features of tropical cyclones (TCs). RCMs show a smaller bias in the mean ocean surface wind around Japan during summer than the reanalysis data that is used as boundary data because of the better representation of land/ocean contrast in RCMs. However, for extreme values of ocean surface winds, all RCMs show a large bias over the ocean south of Japan.The RCM.s reasonably simulate the TC tracks for about 40% of TCs, whereas these models fail to simulate realistic TC tracks for the remaining TCs. The TC track errors in the RCMs spread over a wide range with peaks ranging from 100 to 200 km. Although two RCMs underestimate the surface wind speed associated with TCs, one RCM simulates it reasonably. Therefore, it is suggested that the bias in the extreme values of ocean surface winds can be caused not only by an insufficient representation of surface winds associated with a model TC but also by the model TC track errors. Moreover, these errors may affect the extreme values of precipitation produced by the interaction between TCs and topographies in Japan; therefore the extreme values should be used with caution. Multi-model ensemble approach contributes to reduce TC track errors. As a result, number of the TCs with the relatively small TC track errors increases up to about 60%.
言語 en
書誌情報 en : JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN

巻 90B, p. 91-102, 発行日 2012-03
出版者
言語 en
出版者 METEOROLOGICAL SOC JAPAN
ISSN
収録物識別子タイプ EISSN
収録物識別子 2186-9057
DOI
関連識別子 10.2151/jmsj.2012-B08
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