热带气象学报2018，Vol.34Issue(1)：87-101,15.DOI:10.16032/j.issn.1004-4965.2018.01.009
超强台风SANBA发展演变过程中涡度及环流收支的诊断分析
THE DIAGNOSTIC ANALYSIS OF THE VORTICITY AND CIRCULATION BUDGET DURING THE DEVELOPMENT AND EVOLUTION OF SUPER TYPHOON SANBA
摘要
Abstract
Typhoon enhancement processes accompany with the rapid development of cyclonic vorticity.Based on WRF model simulation results,we diagnose and analyze the vertical vorticity and circulation during the development and evolution of super typhoon SANBA.In order to distinguish convective structures from system structures,a spatial filter is derived using a two-dimensional weight moving average,the weight of which is defined by a window function.The result shows that the updraft increases,warm core structure gradually becomes obvious,and vertical vorticity rapidly enhances with the development of the typhoon.When tropical storm develop into a strong tropical storm (the 30th hour of the simulation),the intensity of the tilting term and divergence term are similar in the lower troposphere,which shows that the enhancement of typhoon vortex structure is closely related with the divergence/convergence and the non-uniform distribution of vertical velocity.When SANBA developed to a super typhoon (the 50th hour of the simulation),both the tilting term and divergence term have strong positive centers near the typhoon center in the lower troposphere,and the contribution of the divergence term is greater than that of the tilting term.The low-level radial inflow enhancement leads to enhanced low-level convergence,playing a major role in the development of typhoon.Developing upwards from 900 hPa to the high level,the circulation intensity is enhanced with the typhoon intensification.Specifically,the change and development of the EED/EET item in the circulation equations may characterize the major changes in the divergence term and tilting term in the early development of typhoon.关键词
天气学/台风/诊断/涡度/环流Key words
synoptics/typhoon/diagnostic/vorticity/circulation分类
天文与地球科学引用本文复制引用
温晓培,隆霄,田畅,袁铁,荆肖军..超强台风SANBA发展演变过程中涡度及环流收支的诊断分析[J].热带气象学报,2018,34(1):87-101,15.基金项目
国家自然科学基金(41375033、41225018)共同资助 （41375033、41225018）
