1998年青藏高原降水特征及大气LFO对长江流域低频降水的影响  

RAINFALL FEATURES OF THE TIBETAN PLATEAU AND LFO INFLUENCE ON LOW FREQUENCY PRECIPITATION IN THE YANGTZE RIVER BASIN

作　　者：徐国强[1] 朱乾根[2] 白虎志 

机构地区：[1]中国气象科学研究院,北京100081 [2]南京气象学院,南京210044 [3]甘肃省气象台,兰州730020

出　　处：《气象科学》2003年第3期282-291,共10页Journal of the Meteorological Sciences

基　　金：国家"十五"科技攻关项目 2 0 0 1BA6 0 7B0 3;中国气象科学院 2 0 0 1年博士启动基金资助

摘　　要：本文使用美国 NCAR- NCEP再分析的逐日资料 ,研究了 1998年夏季青藏高原降水特征及大气准 4 5 d低频振荡 (L FO)对长江流域低频降水的影响。研究表明 ,6月 19日左右青藏高原雨季开始 ,青藏高原是水汽输送的汇区 ;青藏高原影响了我国东部的降水天气过程 ,使长江流域降水不均匀 ;青藏高原的大气低频振荡对东部地区低频降水也产生了影响 。In the context of NCAR reanalysis of daily data in 1998, this paper is concerned with rainfall features of the Tibetan Plateau and low frequency oscillation (LFO) influence on low frequency precipitation in the Yangtze River basin in 1998. Research results suggest that rain season of Tibetan Plateau began on June 19,1998, and that Tibetan Plateau is sink area of vapor transportation. Precipitation in the Yangtze River basin becomes inhomogeneous with impact of the highland. LFO over the highland lends to discrete low-frequency precipitation belt at the east slope of the highland.

关 键 词：青藏高原 低频振荡 低频降水 

分 类 号：P461.3[天文地球—大气科学及气象学]