Title

華南地區熱帶氣旋登陸前強度突變的大尺度環境診斷分析

Translated Titles

The Diagnostic Analysis of the Rapid Change in Tropical Cyclones Intensity before Landfall in South China

Authors

胡春梅(Chun-Mei Hu);端義宏(Yi-Hong Duan);余暉(Hui Yu);于潤玲(Run-Ling Yu);杜秉玉(Bing-Yu Du)

Key Words

登陸熱帶氣旋 ; 強度突變 ; 大尺度診斷分析 ; tropical cyclone landfall ; intensity rapid change ; large-scale environmental flow diagnostic analysis

PublicationName

熱帶氣象學報

Volume or Term/Year and Month of Publication

21卷4期(2005 / 08 / 01)

Page #

377 - 382

Content Language

簡體中文

Chinese Abstract

利用每6小時一次的NCEP再分析資料,對華南地區登陸前突然減弱和突然增強的兩類熱帶氣旋(TC)進行大尺度診斷分析,結果表明:(1)突然增強的TC位於副高的西南側或南側,低空有明顯的西南氣流捲入TC內部,而突然減弱的TC基本在副高西側或西北側;(2)突然增強TC的低空輻合、高空輻散均較強;(3)充足的水汽輸送是TC登陸前突然增強的另一重要原因。

English Abstract

NCEP reanalysis data are used in this paper to diagnose large-scale environmental flows of tropical cyclones (TC), whose intensity change rapidly before landfall in South China. Results show (1) TCs that intensify rapidly are located at the south or southwest of subtropical high and the southwest current are entangled in the center of TC in lower troposphere (850 hPa). While most of TCs that decrease rapidly are at the northwest of subtropical high; (2) there is a favorable environment flow for these rapid intense TCs, which is strong convergence at the low level and remarkable divergence at the upper level; (3) the rapid intensification of TC is related to the sufficient water vapor transportation.

Topic Category 基礎與應用科學 > 大氣科學