| A Statistical Analysis on the Effect of Vertical Wind Shear on Tropical Cyclone Development |
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| 作者姓名： | 赵滨 端义宏 余晖 杜秉玉 |
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| 作者单位： | Nanjing University of Information Science & Technology，Shanghai Typhoon Institute，Shanghai Typhoon Institute，Nanjing University of Information Science & Technology Nanjing 210044 Shanghai Typhoon Institute Shanghai 200030，Shanghai 200030，Shanghai 200030，Nanjing 210044 |
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| 摘 要： | Using tropical cyclone (TC) best track and intensity of the western North Pacific data from the Joint Typhoon Warning Center (JTWC) of the United States and the NCEP/NCAR reanalysis data for the period of 1992-2002, the effects of vertical wind shear on TC intensity are examined. The samples were limited to the westward or northwestward moving TCs between 5°N and 20°N in order to minimize thermodynamic effects. It is found that the effect of vertical wind shear between 200 and 500 hPa on TC intensity change is larger than that of the shear between 500 and 850 hPa, while similar to that of the shear between 200 and 850 hPa. Vertical wind shear may have a threshold value, which tends to decrease as TC intensifies. As the intensifying rate of TC weakens, the average shear increases. The large shear has the obvious trend of inhibiting TC development. The average shear of TC which can develop into typhoon (tropical depression or tropical storm) is below 7 m s-1 (above 8 m s-1).
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| 关 键 词： | 热带气旋 台风 下沉气流 统计分析 |
A Statistical Analysis on the Effect of Vertical Wind Shear on Tropical Cyclone Development |
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| ZHAO Bin,DUAN Yihong,YU Hui,DU Bingyu.A Statistical Analysis on the Effect of Vertical Wind Shear on Tropical Cyclone Development[J].Acta Meteorologica Sinica,2006,20(3):383-388. |
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| Authors: | ZHAO Bin DUAN Yihong YU Hui DU Bingyu |
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| Abstract: | |
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| Keywords: | vertical wind shear tropical cyclone (TC) statistical analysis |
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