期刊
GEOPHYSICAL RESEARCH LETTERS
卷 37, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2010GL042761
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资金
- NSC [NSC98-2111-M133-001]
Typhoon Morakot that made landfall on Taiwan during 7-9 August 2009 caused record-breaking rainfall in Southern Taiwan and nearly 700 deaths from mudslides. It was the most severe natural disaster in Southern Taiwan caused by a typhoon in 50 years. Different from typical typhoon cases, characterized by an isolated vortex, Typhoon Morakot was embedded in a large-scale convection region with monsoon circulation of different time scales in the tropical western North Pacific. Morakot's landing on Taiwan occurred concurrently with the arrival of a large-scale cyclonic circulation in a submonthly wave pattern (10-30-day) during the cyclonic phase of the 40-50-day intraseasonal oscillation. It is suggested that the abundant moisture supply from the southwesterly embedded in the multiscale large-scale circulation and the topographic lifting effect of steep terrain resulted in the record-breaking rainfall in Southern Taiwan. Citation: Hong, C.-C., M.-Y. Lee, H.-H. Hsu, and J.-L. Kuo (2010), Role of submonthly disturbance and 40-50 day ISO on the extreme rainfall event associated with Typhoon Morakot (2009) in Southern Taiwan, Geophys. Res. Lett., 37, L08805, doi: 10.1029/2010GL042761.
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