Comparative analysis on the characteristics of tropical-cyclone activities over the western North Pacific in three datasets

doi:10.3969/j.issn.1001-909X.2020.03.005

Abstract

Abstract: The characteristics of tropical-cyclone(TC) activities over the western North Pacific during 1951-2016 were analyzed using three TC best track datasets(CMA, JTWC and RSMC). The consistent conclusions in three datasets are as follows: TCs mainly occurred in the latitude of 10°N-25°N. Before 1980, there was a southward latitude shift of TC position points, while it was the opposite after 1980. The TC translation speed was mostly distributed in the 2~6 m/s, and TCs significantly sped up near 25°N. The TC translation speed had a significant decrease trend before 1980. The maximum wind speed was mainly distributed in the range of 10~15 m/s, and it decreased before 1980. The radius of maximum wind speed was relatively smaller in the region with larger maximum wind speed. The radius of maximum wind speed of TCs and typhoons decreased by 0.46 km and 0.54 km per year respectively during 2001-2016. The results of CMA and RSMC were highly consistent, while the results of JTWC were different from them to some extent. The difference between the three datasets had a great influence on the change of TC intensity and the numbers of position points, but had a little influence on the change of the TC location and translation speed.

Key words: tropical cyclone, number of TC position points, translation speed, maximum wind speed, radius of maximum wind speed

CLC Number:

P732.3

ZHANG Dongna, ZHANG Han, CHENG Xuhua , CHEN Dake. Comparative analysis on the characteristics of tropical-cyclone activities over the western North Pacific in three datasets[J]. Journal of Marine Sciences, 2020, 38(3): 48-57.

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