| 用数字云图确定热带气旋强度的原理和方法 |
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| 引用本文： | 范蕙君,李修芳,燕芳杰,胡治波.用数字云图确定热带气旋强度的原理和方法[J].大气科学,1996,20(4):439-444. |
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| 作者姓名： | 范蕙君 李修芳 燕芳杰 胡治波 |
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| 作者单位： | 国家气象中心,北京 100081 |
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| 基金项目： | 本文得到国家科技攻关85-906-05课题经费支持 |
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| 摘 要： | 本文采用数字云图资料，分析热带气旋强度与热带气旋中云系结构的关系，提出了云系结构紧密度因子的概念并用云带旋转的圈数表示热带气旋强度的方法。本文对原有关于热带气旋中云系结构的某些因子的取值作了适当调整， 改进了用增强红外云图确定热带气旋强度的方法。 经过对2446组样本的拟合，热带气旋强度最大风速估计值的平均绝对误差为2.48 m/s。本方法可以实现人机交互，能更客观地作出定量估计。对1993年12个热带气旋检验，最大风速平均绝对误差为2.31 m/s。
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| 关 键 词： | 数字云图 热带气旋 强度估计 |
A Technique to Estimate the Intensity of Tropical Cyclone Based on S-VISSR Data |
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| Fan Huijun,Li Xiufang,Yan Fangjie and Hu Zhibo.A Technique to Estimate the Intensity of Tropical Cyclone Based on S-VISSR Data[J].Chinese Journal of Atmospheric Sciences,1996,20(4):439-444. |
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| Authors: | Fan Huijun Li Xiufang Yan Fangjie and Hu Zhibo |
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| Abstract: | In this paper, the concept of tightness of cloud system structure is proposed based on therelationship between the intensity of tropical cyclones and cloud system structure. The number of spirallayers of cloud band is used to estimate the tropical cyclone intensity from S-VISSR data. This is modified for assessing some factors to describe cloud system structure and improved significantly estimationfor the tropical cyclone intensity based on enhanced IR cloud images. A statistic fitting analysis for 2M6samples indicates that the mean absolute error of estimated maxium wind sped near the center of tropical cyclone is 2.46 m / s. This technique is Performed in a Man-Computer interactive Data Access System, in a more objective way to make a quantitative estimation. A test for 12 tropical cyclones in 1993results in the mean absolute error of 2.31 m / s for the estimated maximum wind speed. |
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| Keywords: | S-VISSR data tropical cyclone intensity estimation |
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