中亚五国暴雨分布及其环流特征
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摘要
采用NCEP/NCAR全球逐日格点再分析资料,分析了中亚五国暴雨的落区特征,归纳了不同落区暴雨环流形势的天气学特点。结果表明:中亚五国暴雨次数较少,局地性强。暴雨3个相对集中的区域分别为哈萨克斯坦西部、北部和东部。中亚五国暴雨的环流可分为11个环流型。中亚五国暴雨的影响系统主要为东欧低值系统东南伸,西西伯利亚低值系统西南伸,以及中纬度西风带上东移的短波。伊朗脊是控制中亚五国降水的主要天气系统。中亚五国降水主要有3个水汽源地,分别是地中海、大西洋和北冰洋。
Based on NCEP/NCAR reanalysis data,we analyzed the characteristics of the rainstorm in the five countries of Central Asia,and summarized the circulation situation of rainstorm in different areas. The results show that the number of rainstorms in five countries is less and the local rainfalls is obviously.The three concentrated areas of local rainstorms are located in western,northern and eastern of Kazakhstan.The circulation of heavy rain in the five central Asian countries exist 11 patterns.The impact system of the five Central Asian countries is mainly the southeast extension of the low-pressure system located in eastern Europe,the southwest extension of the low-pressure system of western Siberia,and the eastward shift short wave on the middle latitude air belt.The Iranian ridge as the main weather system controls the precipitation of five countries in Central Asia.The five countries have three water sources:the Mediterranean,the Atlantic and the Arctic Ocean.
Based on NCEP/NCAR reanalysis data,we analyzed the characteristics of the rainstorm in the five countries of Central Asia,and summarized the circulation situation of rainstorm in different areas. The results show that the number of rainstorms in five countries is less and the local rainfalls is obviously.The three concentrated areas of local rainstorms are located in western,northern and eastern of Kazakhstan.The circulation of heavy rain in the five central Asian countries exist 11 patterns.The impact system of the five Central Asian countries is mainly the southeast extension of the low-pressure system located in eastern Europe,the southwest extension of the low-pressure system of western Siberia,and the eastward shift short wave on the middle latitude air belt.The Iranian ridge as the main weather system controls the precipitation of five countries in Central Asia.The five countries have three water sources:the Mediterranean,the Atlantic and the Arctic Ocean.
引文
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[4]CHEN F H,HUANG W,JIN L Y,etal.Spatiotemporal precipitationvariationsin the arid Central Asia in the context of global warming[J].Science China:Earth Sciences,2011,54(12):1812-1821.
[5]黄伟,吴娴,陈建徽,等.中亚干旱区降水准两年周期振荡及突变特征[J].气候变化研究进展,2012,8(6):448-455.
[6]杨莲梅,关学峰,张迎新.亚洲中部干旱区降水异常的大气环流特征[J].干旱区研究,2018,35(2):249-259.
[7]黄秋霞,赵勇,何清.基于CRU资料的中亚地区气候特征[J].干旱区研究,2013,30(3):396-403.
[8]迪丽努尔·托列吾别克,李栋梁.近115a中亚干湿气候变化研究[J].干旱气象,2018,36(2):185-195.
[9]曾勇,杨莲梅,张迎新.中亚低涡背景下新疆阿克苏地区一次强对流天气形成的干侵入机制[J].干旱气象,2018,36(1):34-43.
[10]庄晓翠,李如琦,李博渊,等.中亚低涡造成新疆北部区域暴雨成因分析[J].气象,2017,43(8):924-935.
[11]毛列尼·阿依提看,玉素甫·木沙,郭品文.近10a新疆短时强降水湿度层结及大气能量结构特征分析[J].沙漠与绿洲气象,2017,11(2):43-49.
[12]李如琦,李建刚,唐冶,等.中亚低涡引发的两次南疆西部暴雨中尺度特征对比分析[J].干旱气象,2016,34(2):297-304.
[13]张云惠,谭艳梅,于碧馨,等.中亚低涡背景下南疆西部两次强冰雹环境场对比分析[J].沙漠与绿洲气象,2016,10(4):10-16.
[14]曾勇,杨莲梅.中亚低涡背景下新疆连续短时强降水特征分析[J].沙漠与绿洲气象,2016,10(4):67-73.
[15]杨莲梅,张云惠,秦贺.中亚低涡研究若干进展及问题[J].沙漠与绿洲气象,2015,9(5):1-8.