The ocean response to Typhoon Morakot (2009) in the western North Pacific boundary region

LAI Qiaozhen; MA Leiming; HUANG Wei; WU Liguang

doi:10.3969/j.issn.0253-4193.2013.03.008

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LAI Qiaozhen, MA Leiming, HUANG Wei, WU Liguang. The ocean response to Typhoon Morakot (2009) in the western North Pacific boundary region[J]. Haiyang Xuebao, 2013, 35(3): 65-77. doi: 10.3969/j.issn.0253-4193.2013.03.008

Citation:

LAI Qiaozhen, MA Leiming, HUANG Wei, WU Liguang. The ocean response to Typhoon Morakot (2009) in the western North Pacific boundary region[J]. Haiyang Xuebao, 2013, 35(3): 65-77. doi: 10.3969/j.issn.0253-4193.2013.03.008

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The ocean response to Typhoon Morakot (2009) in the western North Pacific boundary region

doi: 10.3969/j.issn.0253-4193.2013.03.008

1.
Longyan Meteorological Office of Fujian Province, Longyan 364000, China
2.
Shanghai Typhoon Institute CMA, Shanghai 200030, China
3.
Nanjing University of Information Science & Technology/Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing 210044, China

Received Date: 2012-05-15
Rev Recd Date: 2012-08-04

Abstract

Abstract

When tropical cyclones move over the shallow waters near islands and continents, the influences of the continental shelf and complicated thermodynamic conditions make typhoon forecasts much difficult. For this reason, a coupled model that consists of the hurricane GRAPES-TCM model and the ECOM ocean model has been developed in Shanghai Typhoon Institute of China Meteorological Administration. In order to evaluate the coupled model and understand the response of the western ocean boundary to tropical cyclones, numerical simulations of the landfalling process of Typhoon Morakot (2009) are conducted and compared with the satellite observations, with a focus on sea temperatures, upwelling and ocean currents. The coupled model can reasonably well simulate the dynamic and thermodynamic ocean responses during the landfall process of Typhoon Morakot. In the coastal waters, maximum sea temperature cooling occurred on the left-hand side of the typhoon track during its landfall, mainly due to the strong upwelling along the southeastern coast of Taiwan Island. Then the cold eddy in the Pengjiayu sea area to the northest of Taiwan Island weakened as the typhoon was over the Northwest Pacific and strengthened as the typhoon crossed the Taiwan Strait. The crossing of Morakot increased the mixed layer depth, leading to disappearance of the stratification of sea water in the Taiwan Strait.
- typhoon,
- ocean response,
- coupled model,
- Kuroshio Current,
- cold eddy,

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References(43)

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