ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 42 Issue 11 > 2016,42(11):1315-1324. DOI:10.7519/j.issn.1000-0526.2016.11.003 Prev Next
Applications of MTCSWA Data to the Characteristic Analysis of Tropical Cyclone Structure
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Abstract:
Based on Multiplatform Tropical Cyclone Surface Wind Analysis (MTCSWA) data from NOAA/NESDIS during 2007-2014, statistic characteristics of 210 named TCs’structures in the North Western Pacific and the South China Sea are analyzed. Compared with the maximum wind speed (VMAX) from CMAbest tracks, the VMAX from MTCSWA is 10%-15 % smaller on average. Overestimation, especially for weaker TCs, is observed. Statistical relationship is provided between radius of maximum wind speed (RMAX) and VMAX, and the density distributions of RMAX in different regions are calculated. For those TCs stronger than STS, the density distributions show no regional differences while the less intensified groups show obvious structure distributions in the North Western Pacific, the Northern and Eastern China Seas and the South China Sea. Especially, in the South China Sea, the distribution difference gets much broadly from 50 to 100 km. By analyzing the distributions of four quadrants, the eastern parts of R34 is comparably larger than that in western parts, but there is no such a character in both R50 and R65. From the case study of SuperTY Bolavan (1215), an eyewall replacement and innercore structure change can be observed. During that ERC period, the distance between inner and outer eyewall (R2-R1) is reduced along with V1’s decreasing and V2’s increasing. Meanwhile the original intensity shows temporary fluctuation.
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