| THE THEORY OF MOIST POTENTIAL VORTICITY AND ITS APPLICATION IN THE DIAGNOSIS OF TYPHOON RAINFALL AND INTENSITY |
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| 作者姓名： | 邓 国 高守亭 |
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| 作者单位： | DENG Guo(National Meteorological Center,Beijing 100081 China);GAO Shou-ting(Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 China) |
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| 基金项目： | State Key Development Program for Basic Research of China，National Natural Science Foundation of China，NMC-TIGGE Program，Project of State Key Laboratory of Severe Weather |
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| 摘 要： | This paper tests the impacts of cloud-induced mass forcing on the moist potential vorticity
(MPV) anomaly associated with torrential rains caused by Typhoon No.9914 (Dan) by using fine model
simulation data outputted by the Fifth-Generation NCAR / Penn State Mesoscale Model (MM5). The
diagnostic results show that the positive MPV anomaly region, which is obtained by integrating the MPV
from 600 hPa to 300 hPa in the vertical, roughly coincides with the precipitation at their synchronous
stages either in position or in the distribution pattern, and the maximum positive MPV area of Dan is
located mainly between 600 hPa and 300 hPa, which is much higher than torrential rain cases. Further
analyses also showed that the value of positive MPV anomaly increased or decreased with the development
of Dan, and the positive MPV anomaly may also be served as a tracer to indicate the evolution of tropical
cyclone intensity.
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| 关 键 词： | 热带气旋强度 湿位涡 诊断 台风 宾夕法尼亚州立大学 应用 降雨 中尺度暴雨 |
THE THEORY OF MOIST POTENTIAL VORTICITY AND ITS APPLICATION IN THE DIAGNOSIS OF TYPHOON RAINFALL AND INTENSITY |
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| DENG Guo and GAO Shou-ting.THE THEORY OF MOIST POTENTIAL VORTICITY AND ITS APPLICATION IN THE DIAGNOSIS OF TYPHOON RAINFALL AND INTENSITY[J].Journal of Tropical Meteorology,2009,15(2):204-209. |
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| Authors: | DENG Guo and GAO Shou-ting |
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| Institution: | 1. National Meteorological Center,Beijing 100081 China
2. Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 China |
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| Abstract: | This paper tests the impacts of cloud-induced mass forcing on the moist potential vorticity (MPV) anomaly associated with torrential rains caused by Typhoon No.9914 (Dan) by using fine model simulation data outputted by the Fifth-Generation NCAR / Penn State Mesoscale Model (MM5). The diagnostic results show that the positive MPV anomaly region, which is obtained by integrating the MPV from 600 hPa to 300 hPa in the vertical, roughly coincides with the precipitation at their synchronous stages either in position or in the distribution pattern, and the maximum positive MPV area of Dan is located mainly between 600 hPa and 300 hPa, which is much higher than torrential rain cases. Further analyses also showed that the value of positive MPV anomaly increased or decreased with the development of Dan, and the positive MPV anomaly may also be served as a tracer to indicate the evolution of tropical cyclone intensity. |
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| Keywords: | moist potential vorticity typhoon mass forcing |
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