1961-2017年黑龙江省夏季降水异常成因的分析  

Analysis on the cause of summer precipitation anomaly in Heilongjiang Province from 1961 to 2017

作　　者：石红艳[1] 杨宁 潘华盛[3] SHI Hong-Yan;YANG Ning;PAN Hua-Sheng(Bureau of Meteorology of Shuangyashan city, Shuangyashan 155100,Heilongjiang,China;Heilongjiang Provincial Meteorological Service Center,Harbin 150030,China;Heilongjiang Provincial Meteorological Office, Harbin 150030,China)

机构地区：[1]双鸭山市气象局,黑龙江双鸭山155100 [2]黑龙江省气象服务中心,哈尔滨150030 [3]黑龙江省气象台,哈尔滨150030

出　　处：《黑龙江大学工程学报》2020年第1期28-35,共8页Journal of Engineering of Heilongjiang University

摘　　要：为研究黑龙江省夏季降水变化特征和异常成因,使用1961—2017年黑龙江夏季降水、北半球500 hPa高空资料,采用了相关分析、EOF降水展开等方法。结果表明1961—2017年黑龙江省夏季降水呈稍降趋势但变化不大;揭示出降水多、少存在16 a转换周期,从2012年开始进入多水期。对降水EOF展开分型,分为4型为好,占总方差63%,但主要是前二型。分析了中亚高压、东亚低槽及西太平洋副高等环流变化对黑龙江省夏季降水异常形势EOF1型和EOF2型成因的影响。To research the characteristics of precipitation variance and the cause of its anomaly in Heilongjiang Province,data of the summer precipitation from 1961 to 2017 in Heilongjiang Province and 500 hPa sky quote of northern hemisphere are collected.The correlation analysis,the expansion in terms of EOF calculation method are adopted.The result shows there is weak decreasing trend in summer from 1961 to 2017,however,the trend is not significant.There is a 16-year conversation cycle for the precipitation,Heilongjiang has been into a period of more than normal since 2012.The four types of rain are developed based the EOF expansion,among which good type accounts for 63%of the total variance,but mainly the first two types according to more.Besides,the effect of atmospheric circulation variance towards the cause of unusual EOF1 type and EOF2 type precipitation is analyzed.

关 键 词：夏季降水 异常成因 EOF展开 相关分析 

分 类 号：P426.614[天文地球—大气科学及气象学]