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引用本文:

DOI:

10.11834/jrs.20210154

收稿日期:

2020-05-12

修改日期:

2020-08-19

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基于A-train卫星传感器的台风云体三维结构构建
程崇慧1, 陈斯婕1, 郑卓凡1, 董长哲2, 苏林3, 柯举1, 王帅博1, 仝博文1, 刘东1
1.浙江大学;2.上海卫星工程研究所;3.中国科学院遥感与数字地球研究所遥感科学国家重点实验室
摘要:

基于星载主-被动传感器数据,本研究利用约束光谱辐射匹配(Constrained Spectral Radiance Matching,CSRM)算法构建了8个西太平洋台风事件中的深对流云层三维结构模型,并据此分析深对流云在台风不同发展阶段中的水平分布特征和微物理特征。利用CSRM算法进行大气三维结构构建的意义在于将主动遥感的垂直分布信息向被动遥感的探测范围传递,增加统计分析8个台风事件可用的廓线数量,进一步保证对深对流云统计分析的有效性,统计分析结果表明:(1)衰弱期台风的深对流云占比(占所有种类云的比例)比增强期台风更低,并且其值在各个方向上更稳定。相比于台风,热带风暴中的深对流云占比在各个方向上差异更大,即不对称性更强;(2)热带气旋中深对流云的冰云有效粒子半径与高度成正比。随着高度增加,冰水粒子数浓度先增加后减少。同一热带气旋不同发展阶段的深对流云的冰水含量(Ice Water Content,IWC)的垂直分布有着较大的差别。当热带气旋发展成台风时,其内部深对流云的IWC高值区逐渐向云层顶部集中,并且随着台风从增强期转化为衰弱期,IWC的最大值显著增大。

Construction of three-dimensional structure of typhoon cloud based on A-train satellite sensor
Abstract:

The object of this paper is to increase the number of profiles of typhoon event used for statistical analysis, and to further ensure the effectiveness of the statistical analysis of deep convective clouds. Based on the data fusion of spaceborne active-passive sensors, the constrained spectral radiation matching algorithm is used to transfer the vertical distribution information of active remote sensing to passive remote sensing. Three-dimensional structural models of deep convective clouds in 8 western Pacific typhoon events were constructed. Based on this, the horizontal distribution and the microphysical characteristics of deep convective cloud were analyzed. The conclusion is as follows: (1) The proportion of deep convective clouds (all types of clouds) of typhoons in the weak period is lower than that of the typhoon in the strengthening period, and its value is more stable in all directions; Compared with typhoons, the proportion of convective cloud of the tropical storms varies greatly in all directions. In other word, the asymmetry of the tropical storms is stronger; (2) The ice cloud effective radius (IER) of deep convective clouds in tropical cyclones is proportional to the height. As the height increases, the ice water number concentration (INC) increases first and then decreases. The vertical distribution of ice water content (IWC) of deep convective clouds at different development stages of the same tropical cyclone is quite different. When a tropical cyclone develops into a typhoon, the IWC high-value area of its deep convective clouds gradually concentrates towards the top of the cloud layer, and the maximum value of IWC increases significantly as the typhoon transforms from an intensified period to a weakened period.

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