著者
Youichi KAMAE Wei MEI Shang-Ping XIE
出版者
(公社)日本気象学会
雑誌
気象集誌. 第2輯 (ISSN:00261165)
巻号頁・発行日
vol.95, no.6, pp.411-431, 2017 (Released:2017-11-14)
参考文献数
76

Eddy transport of atmospheric water vapor from the tropics is important for rainfall and related natural disasters in the middle latitudes. Atmospheric rivers (ARs), intense moisture plumes that are typically associated with extratropical cyclones, often produce heavy precipitation upon encountering topography on the west coasts of mid-latitude North America and Europe. ARs also occur over the northwestern Pacific and sometimes cause floods and landslides over East Asia, but the climatological relationship between ARs and heavy rainfall in this region remains unclear. Here we evaluate the contribution of ARs to the hydrological cycle over East Asia using high-resolution daily rainfall observations and an atmospheric reanalysis during 1958-2007. Despite their low occurrence, ARs account for 14-44 % of the total rainfall and 20-90 % of extreme heavy-rainfall events during spring, summer, and autumn. AR-related extreme rainfall is especially pronounced over western-to-southeastern slopes of terrains over the Korean Peninsula and Japan, owing to strong orographic effects and a stable direction of low-level moisture flows. A strong relationship between warm-season AR heavy rainfall and preceding-winter El Niño is identified since the 1970s, suggesting the potential of predicting heavy-rainfall risk over Korea and Japan at seasonal leads.

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Climatological Relationship between Warm Season Atmospheric Rivers and Heavy Rainfall over East Asia https://t.co/gTZP4vv6kZ
Climatological relationship between warm season atmospheric rivers and heavy rainfall over East Asia. https://t.co/1Pkc3NSkNe
JMSJ New paper published:Kamae et al 2017: Climatological relationship between warm season atmospheric rivers and… https://t.co/msli0x2k6k
Atmospheric riverによる降水が、日本に降る雨の大きな割合を占めることを見出した論文が、JMSJから出版されました。載せている図を大きく拡大して、お住まいの地域はどうか、ぜひチェックしてみて下さい。… https://t.co/JewLOKnHFv

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