摘要
利用中国气象局整编的《热带气旋年鉴》资料以及NCEP/NCAR再分析资料,对比分析了2005年"达维"台风登陆海南岛过程与登陆越南大陆过程大尺度物理量场的垂直结构变化特征。结果表明,"达维"经过岛屿过程的结构演变与登陆大陆不同之处在于结构复原现象。登陆海南岛过程及岛上移动初期,水平风场的对称结构以及次级环流被破坏,在岛上移动后期及离岛入海过程,结构复原。"达维"台风经过海南岛过程水汽不被切断,反而由于陆地摩擦加大、辐合增强而导致水汽通量辐合增加,暖心及位涡中心下移,中低层对流在登陆岛屿过程短暂减弱后,在岛上移动阶段逐步加强。
Using the NCEP/ NCAR reanalysis data as well as and the ＂Tropical Cyclones Yearbook＂ data which are supplied by the China Meteorological Administration（CMA）,the large-scale physical field characteristics of the vertical structural evolution of typhoon ＂Damrey＂（2005）through Hainan Island and landing Vietnam are compared.The results show that the difference on structural change of this tropical cyclones between the process through Hainan Island and landing continent focus on structure restoration.In the process of Damrey landfalling Hainan Island to the of moving on the island,it＇s symmetric horizontal wind field structural and secondary circulation damage,while on the later period though the island and into the sea,destroyed symmetric construction towards recovery.The water vapor will not be cut off when tropical cyclones though Hainan Island,thus may cause water vapor flux convergence increases due to the impact of land surface friction.The warm core and the potential vorticity center moved downward,the convective activities in lower troposphere exhibits a short-term decay process during land-falling,but it will be re-strengthened after landing,as well as into the sea.
出处
《热带农业科学》
2011年第3期30-37,共8页
Chinese Journal of Tropical Agriculture
基金
国家自然基金项目(No.40765002)
公益性行业(气象)科研专项经费项目(No.GYHY200906002)
关键词
强台风“达维”
登陆
海南岛
结构演变
strong typhoon Damrey
landing
Hainan Island
structural evolution
