塔里木盆地夏季热低压的特征分析  

Analysis on the Characteristics of Heat Low in Summer over the Tarim Basin

作　　者：张寅钲 赵勇[1] 霍文[2] ZHANG Yinzheng;ZHAO Yong;HUO Wen(College of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002

出　　处：《成都信息工程大学学报》2023年第2期214-220,共7页Journal of Chengdu University of Information Technology

基　　金：中央级公益性科研院所基本科研业务费专项基金资助项目(IDM2018005);中国沙漠气象科学研究基金资助项目(sqj2017011)。

摘　　要：为更好地揭示塔里木盆地热低压的时空变化特征,利用1979-2016年欧洲中期预报中心的再分析资料,采用相关分析和合成分析的方法对塔里木盆地夏季热低压的时空特征和影响因子进行讨论和分析。结果表明,塔里木盆地夏季热低压主要在盆地南部生成,7月最多、强度最强,8月生成的热低压生命史最长。夏季热低压频数、生命史和强度均呈减少和减弱趋势。夜间型(日间型)和短生命史型(长生命史型)热低压频数均呈减少趋势,但对热低压总频数的贡献呈增加(减少)趋势。盆地南部和山区的热力对比及低空东风急流导致盆地南部海平面气压降低,为热低压的生成提供了有利条件。In order to better reveal the spatio-temporal variation characteristics of heat low in summer over the Tarim Basin,based on the reanalysis dataset provided by the European Centre for Medium-Range Weather Forecasts(ECMWF)during 1979-2016,the spatio-temporal variation characteristics of heat low and its influencing factors are analyzed and discussed by using the methods of correlation and synthetic analysis.The results show that the heat low mainly generates in the southern part of the basin,with the most generated and the strongest intensity in July,and the heat low occurring in August has the longest duration.The frequency,intensity and duration of summer heat low all show a decreasing and weakening trend,but the contribution of the frequency of heat low occurring in night(daytime)or short duration(long duration)to total frequency shows an increasing(decreasing)trend.Furthermore analysis indicates that the thermal contrast between the mountains and the basin and low level easterly jet both are contributed to the decline of sea level pressure over the southern part of the basin,which are favorable to occurrence of heat low.

关 键 词：气候变化 热低压 低空急流 热力差异 塔里木盆地 

分 类 号：P467[天文地球—大气科学及气象学]