海洋预报2018，Vol.35Issue(2)：36-43,8.DOI:10.11737/j.issn.1003-0239.2018.02.005
1713号台风“天鸽”近海突变特征及原因分析
Analysis on the sudden change and its cause of Typhoon Hato
摘要
Abstract
Based on the NCAR/NCEP reanalysis data and the hourly tropical cyclone data provided by National Meteorological Center of China Meteorological Administration,the track and intensity characteristics of Typhoon Hato and the reasons of its rapid intensification over inshore coastal water are analyzed in this study.Results indicate that:(1)The period from 15:00 on 22 to 13:00 on 23 August are the key time periods of Hato's rapid intensification.During this period,Hato intensified from tropical storm to strong tropical storm and then further to strong typhoon.Its rapid intensification can be divided into two phases in which the first covering from 15:00on 22 to 00:00 on 23 August and the second from 9:00 to 13:00 on 23.(2)The influence of warm SST on Hato was revealed by its sudden intensity change over coastal water.(3) The two phases of rapid intensification were coincided with more abundant water vapor transport which is in favor of the strengthen of Hato's latent heating release and rapid intensification.Furthermore,the vertical wind shear swiftly decreased and increased before and after the sudden change of Hato's intensity in which the latter process is caused by the strengthening of upper-layer outflows.(4)The evolution of vorticity was in close relationship to the rapid intensification of Hato,while the lower-level convergence caused by the convergence term enhanced and led to the development of upper-layer divergence flows which further promoted the increase of mid-and lower-level convergence.The positive feedback brought about the accumulation of lower-layer positive vorticity and upper-layer negative vorticity and then led to the sudden intensifying of Hato.关键词
强度突变/水汽条件/风垂直切变/海表温度/涡度Key words
rapid intensification/vapor condition/vertical wind shear/sea surface temperature/vorticity分类
天文与地球科学引用本文复制引用
张静,史达伟,李超..1713号台风“天鸽”近海突变特征及原因分析[J].海洋预报,2018,35(2):36-43,8.基金项目
江苏省自然科学基金青年基金项目(BK20171095) （BK20171095）
中国气象局预报员专项(CMAYBY2017-026) （CMAYBY2017-026）
淮河流域气象开放研究基金(HRM201602) （HRM201602）
江苏省气象局青年基金(KQ201802) （KQ201802）
连云港市科技支撑项目(SH1634) （SH1634）
连云港市气象局海洋气象预报技术科技创新团队基金. （）
