Roles of European blocking and tropical-extratropical interaction in the 2010 Pakistan flooding.

University of Taipei > 理學院 > 地球環境暨生物資源學系(含環境教育與資源碩士班) > 期刊論文 > Item 987654321/11090

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题名:	Roles of European blocking and tropical-extratropical interaction in the 2010 Pakistan flooding.
作者:	洪志誠;Chi-Cherng Hong;Huang-Hsiung Hsu;Nai-Hsin Lin;Hsun Chiu
贡献者:	地球環境暨生物資源學系(含環境教育與資源碩士班)
关键词:	Pakistan flooding;blocking;monsoon surge;tropical-extratropical interaction
日期:	2011-07
上传时间:	2014-01-17 19:30:21 (UTC+8)
摘要:	A sequence of monsoon surges struck Pakistan and Northwestern India during late July-early August 2010. The unusually heavy monsoon rainfall resulted in record-breaking floods, which affected 20 million people with a death toll of near 3000. Simultaneously, a long-lived blocking high appeared over Europe and Russia in middle June and persisted for nearly two months. Extreme flooding occurred when the southward penetration of extratropical potential vorticity in the deep trough east of the European blocking and the tropical monsoon surges arrived concurrently in Pakistan. This study demonstrates that the interaction between the tropical monsoon surges and the extratropical disturbances downstream of the European blocking was the key factor leading to the severe flooding in Pakistan. The 2010 La Niña condition contributed indirectly to the flooding by inducing a low-level easterly anomaly in South and Southeast Asia, which weakened eastward moisture transport and helped enhance moisture transport (convergence) to (in) the Northern Arabian Sea and Pakistan.
關聯:	Geophysical Research Letters，Vol. 38, Issue 13，Pages L13806
显示于类别:	[地球環境暨生物資源學系(含環境教育與資源碩士班)] 期刊論文

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