Title

2003年淮河流域異常降水期間副熱帶高壓的特徵

Translated Titles

Characteristics of the Subtropical Anticyclone during the Abnormal Rainfall Period over the Huaihe River Region 2003

Authors

姚秀萍(Xiu-Ping Yao);于玉斌(Yu-Bin Yu);劉還珠(Huan-Zhu Liu)

Key Words

西太副高 ; OLR ; 西風急流 ; 熱帶對流 ; 潛熱 ; SA ; OLR ; westerly jet ; convective ; latent heating

PublicationName

熱帶氣象學報

Volume or Term/Year and Month of Publication

21卷4期(2005 / 08 / 01)

Page #

393 - 401

Content Language

簡體中文

Chinese Abstract

採用NCEP資料以及NOAA衛星觀測的OLR場資料,分析2003年6~7月淮河流域暴雨期間西太平洋副熱帶高壓的異常特徵,結果表明西太副高相對偏北並且相對穩定;西太副高活動呈現出南北移動和東西進退的特徵,但是東西進退明顯於南北移動;副高脊線從低層到高層向北傾斜,並且在副高脊線附近的低層以下沉運動為主,在其上層以上升運動為主;中高緯度阻塞高壓雙阻型的建立、強勁而穩定少動的中緯度西風急流以及熱帶異常活躍的對流,均有利於副熱帶高壓的相對穩定;淮河流域異常的持續降水,加強了對流潛熱的釋放,有利於副高的加強西伸。

English Abstract

Using the NCEP data sets and the Outgoing Longwave Radiation (OLR) data sets, the analyses of the abnormal characteristics of the West Pacific Subtropical Anticyclone (WPSA) during the heavy rainfall period over the Huaihe basin region from June to July 2003 is made in this paper. It is shown that the WPSA is characterized by more northward than usual and relative stability. There exist shifts in the north-south direction and oscillations in the east-west direction for the movement of the WPSA, but the latter is more obvious than the former. The ridge of the WPSA inclines to the north from the lower troposphere to the higher troposphere, and there exists descending motion below the lower-mid troposphere and ascending motion above the mid-upper troposphere near the ridge of the WPSA. The establishment of a blocking anticyclone in the mid-higher latitude, the strong and the stable westerly jet in the middle latitude and the abnormal actively convective in the tropical region are conducive to the relative stability of the WPSA. Meanwhile, the continuous anomalous rainfall over the Huaihe R. basin region can also enhance the release of convective latent heating, which helps the development and westward movement of the WPSA.

Topic Category 基礎與應用科學 > 大氣科學