Modulation of High-Latitude Tropical Cyclone Recurvature by Solar Radiation  

作　　者：Jiawei LING Xuyang GE Melinda PENG Qijun HUANG 

机构地区：[1]Key Laboratory of Meteorological Disaster of Ministry of Education,Joint International Research Laboratory of Climate and Environment Change,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing,210044,China [2]University of Colorado Colorado Springs,Colorado Springs,Colorado,80918,USA

出　　处：《Journal of Meteorological Research》2023年第6期802-811,共10页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (42175003 and 42088101)。

摘　　要：In this study,idealized simulations are conducted to investigate potential influences of solar radiation on the tropical cyclone(TC) recurvature at higher latitudes.Results indicate that TC track is sensitive to the seasonal variation of radiative forcing at higher latitudes.In the absence of a background flow,TCs at higher latitudes tend to recurve(remain northwestward) in the cold(warm) season.This feature is an additional aspect of the so-called intrinsic recurvature property of TC movement at high latitude.Physically,the greater meridional gradient of temperature in the cold season due to solar radiative forcing would induce a larger thermal wind,which affects the upper-level anticyclonic circulation and associated outflow.The structure changes of TC,mainly at upper-levels,modulate the steering flow for TC,leading to a higher probability of TCs at higher latitudes to recurve in the cold season than in the warm season.

关 键 词：tropical cyclone motion solar radiative forcing higher latitude thermal wind 

分 类 号：P422.1[天文地球—大气科学及气象学] P444