热带气象学报2025，Vol.41Issue(4)：531-540,10.DOI:10.16032/j.issn.1004-4965.2025.046
上海沿岸水域近海北上热带气旋大风成因的动量诊断分析
Momentum Diagnostic Cause Analysis of Offshore North-ward Tropical Cyclone Gales in Shanghai Coastal Areas
摘要
Abstract
Based on the ERA5 reanalysis data and China Meteorological Administration(CMA)tropical cyclone best track data from 1981 to 2022,this study analyzes the gale characteristics induced by offshore and northward-moving tropical cyclones(TCs)in Shanghai coastal areas.A quantitative momentum budget diagnostic equation is then utilized to investigate their dynamic mechanisms.The results show that:(1)Substantial discrepancy exists in the maximum impact wind intensities among different TCs,and the intensities are strongly affected by the distance of the TCs from Shanghai coastal waters.(2)The pressure gradient acceleration(PGA)and the vertical advection(VA)terms are the primary dynamical mechanisms for TC gales in Shanghai coastal areas.The PGA term accounts for the major contribution,followed by the VA term,with the intensity of both terms strengthen with wind intensities.(3)Enhanced pressure gradient directly strengthens the PGA term,while the downward transport of high momentum from the boundary layer jet amplifies the VA term above the boundary layer,ultimately driving the TC gales in the Shanghai coastal areas.These results establish important guidance for TC gale forecasting and have practical value for operational applications,thereby offering a scientific basis for disaster prevention and mitigation.关键词
动量收支诊断/近海北上/热带气旋大风/动力成因Key words
momentum budget diagnosis/northward offshore/tropical cyclone gales/dynamic analysis分类
天文与地球科学引用本文复制引用
管靓,岳彩军,陈曦,姚瑶,曾智华,邓立平..上海沿岸水域近海北上热带气旋大风成因的动量诊断分析[J].热带气象学报,2025,41(4):531-540,10.基金项目
国家自然科学基金项目(41875059、41875071、41975067) （41875059、41875071、41975067）
上海市自然科学基金项目(21ZR1457700、22ZR1456100) （21ZR1457700、22ZR1456100）
中国气象局预报员专项(CMAYBY2020-042) （CMAYBY2020-042）
中国气象局复盘专项(FPZJ2025-044)共同资助 （FPZJ2025-044）
