ANALYSIS OF MID-SUMMER HIGH TEMPERATURE FREQUENCY ANOMALY IN GUANGZHOU  

作　　者：刘燕 程正泉 蔡安安 

机构地区：[1]Guangzhou Central Meteorological Observatory

出　　处：《Journal of Tropical Meteorology》2007年第1期65-68,共4页热带气象学报（英文版）

基　　金：A project from Science and Technology Bureau of Guangdong Province (2005B32601008)

摘　　要：Using EOF, correlation analysis, the climatic characteristics are analyzed of the yearly high temperature frequency (HTF) in Guangzhou from 1951-2004, and the relationship between the mid-summer (July and August) HTF anomaly and the synchronous 500hPa heights of the region(65 - 150°E, 10 - 70°N) is also discussed. The results show that: (1) the average of HTF is 8.7 days per year in the recent 54 years in Guangzhou; high temperature occurs from May to September, and July and August have the highest frequency of occurrence; (2) there are distinct interannual and interdecadal changes in Guangzhou HTF, with an obvious increase since the 1980s; (3) the anomalous increase of mid-summer HTF in Guangzhou since the 1980s has a close relationship with the weakened westerlies in Northwest China, Mongolia, Lake Baikal and their vicinity and the intensified subtropical high in the mid-low latitude areas.Using EOF, correlation analysis, the climatic characteristics are analyzed of the yearly high temperature frequency （HTF） in Guangzhou from 1951-2004, and the relationship between the mid-summer （July and August） HTF anomaly and the synchronous 500hPa heights of the region（65 - 150°E, 10 - 70°N） is also discussed. The results show that： （1） the average of HTF is 8.7 days per year in the recent 54 years in Guangzhou; high temperature occurs from May to September, and July and August have the highest frequency of occurrence; （2） there are distinct interannual and interdecadal changes in Guangzhou HTF, with an obvious increase since the 1980s; （3） the anomalous increase of mid-summer HTF in Guangzhou since the 1980s has a close relationship with the weakened westerlies in Northwest China, Mongolia, lake Baikal and their vicinity and the intensified subtropical high in the mid-low latitude areas.

关 键 词：high temperature frequency 500hPa height correlation 

分 类 号：P423.3[天文地球—大气科学及气象学]