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The Technique for Determining Tropical Cyclone Intensity with Enhanced Satellite Cloud Imagery
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摘要: 文章介绍了用增强显示红外云图确定热带气旋强度的方法。利用1983—1988年GMS增强显示云图资料，对中央气象台使用的《用地球同步气象卫星红外云图估计热带气旋强度》的方法中的云特征指数进行了修改与调整，增加了眼区的温度、中心强对流云区和螺旋云带的云顶温度等新的云特征因子。经统计、拟合，得到云特征指数与热带气旋中心附近最大风速、最低海平面气压的对应关系，给出了计算热带气旋强度的人-机交互方法流程，此方法对各种强度的热带气旋都能客观地计算其强度，使用简便，且精度满足业务应用要求。Abstract: This paper develops a new technique for determining the tropical cyclone intensity, which is based on the statistical relationships of cloud intensity index in EIR imagery with the maximum velocity and the minimum sea level pressure of tropical cyclones in the period of 1983―1988. A flow diagram of this technique in a man-computer interface structure is designed for operational use in NMC of China. This technique is more objective and quantitative than those used in the NMC
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Key words:
- EIR imagery;
- Cloud characteristic index;
- Tropical cyclone
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