Analyses on Vertical Structure and Microphysical Features of Typhoon Cloud in Western Pacific Based on CloudSat Satellite Data
In this paper, observations from CloudSat satellite dataset from 2012 to 2014 are used to analyze the vertical structure and microphysical features of typhoon cloud in western Pacific with the six kinds of intensities and radial distances from the center. The main conclusions are summarized as follows: (1) The occurrence frequency of singlelayer cloud dominates and doublelayer cloud is relatively more common in the multilayer cloud. With the increasing intensity of typhoon, the singlelayer cloud is thicker inside the radial distance 250 km, but thinner and mostly concentrated in the range of 7-15 km out of the radial distance 450 km. Similarly, the bottom and top layer clouds of doublelayer are thicker, the distance between them is narrow inside the 250 km range, and the feature out of the 450 km range is inversed. (2) The occurrence frequencies of deep convective clouds, cirrus, and altostratus are higher, compared to other clouds, the distributions have obvious changes with the changes of typhoon intensities and the radial distance. (3) The radar reflectivity becomes stronger above the 5 km in the stage of mature typhoon. Meanwhile, there are obvious columnar radar reflectivity areas out of 450 km. (4) The liquid water and ice water contents near the center of typhoon are increased with the change of typhoon intensities. In addition, the high value area of ice water content is always concentrated near 10 km in the outer cloud bands. The distribution of liquid droplet number concentration is consistent with the liquid water content. However, the high value area of ice water content is below the high area of ice droplet number concentration.