| The Impact of the Storm-Induced SST Cooling on Hurricane Intensity |
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| 作者姓名： | Tong ZHU Da-Lin ZHANG |
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| 作者单位： | Tong ZHU and Da-Lin ZHANG CIRA/CSU at NOAA/NESDIS/ORA，Camp Springs，MD 20746，USA Department of Meteorology，University of Maryland，College Park，MD 20742，USA |
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| 基金项目： | NASA，NSF，ONR of USA，CIRA/Colorado State University |
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| 摘 要： | The effects of storm-induced sea surface temperature (SST) cooling on hurricane intensity are investigated using a 5-day cloud-resolving simulation of Hurricane Bonnie (1998). Two sensitivity simulations are performed in which the storm-induced cooling is either ignored or shifted close to the modeled storm track. Results show marked sensitivity of the model-simulated storm intensity to the magnitude and relative position with respect to the hurricane track. It is shown that incorporation of the storm-induced cooling, with an average value of 1.3℃, causes a 25-hPa weakening of the hurricane, which is about 20 hPa per 1℃ change in SST. Shifting the SST cooling close to the storm track generates the weakest storm, accounting for about 47% reduction in the storm intensity. It is found that the storm intensity changes are well correlated with the air-sea temperature difference. The results have important implications for the use of coupled hurricane-ocean models for numerical prediction of tropical cyclones.
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| 收稿时间： | 8 March 2005 |
The Impact of the Storm-Induced SST Cooling on Hurricane Intensity |
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| Tong ZHU,Da-Lin ZHANG.The Impact of the Storm-Induced SST Cooling on Hurricane Intensity[J].Advances in Atmospheric Sciences,2006,23(1):14-22. |
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| Authors: | Tong ZHU and Da-Lin ZHANG |
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| Institution: | CIRA/CSU at NOAA/NESDIS/ORA, Camp Springs, MD 20746, USA,Department of Meteorology, University of Maryland, College Park, MD 20742, USA |
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| Abstract: | The effects of storm-induced sea surface temperature (SST) cooling on hurricane intensity are investigated using a 5-day cloud-resolving simulation of Hurricane Bonnie (1998). Two sensitivity simulations are performed in which the storm-induced cooling is either ignored or shifted close to the modeled storm track. Results show marked sensitivity of the model-simulated storm intensity to the magnitude and relative position with respect to the hurricane track. It is shown that incorporation of the storm-induced cooling, with an average value of 1.3℃, causes a 25-hPa weakening of the hurricane, which is about 20hPa per 1℃ change in SST. Shifting the SST cooling close to the storm track generates the weakest storm,accounting for about 47% reduction in the storm intensity. It is found that the storm intensity changes are well correlated with the air-sea temperature difference. The results have important implications for the use of coupled hurricane-ocean models for numerical prediction of tropical cyclones. |
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| Keywords: | SST feedback hurricane intensity numerical modeling |
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