沙漠与绿洲气象2023，Vol.17Issue(6)：133-140,8.DOI:10.12057/j.issn.1002-0799.2023.06.018
山西省春播期降水时空变化及环流异常特征
Precipitation Variations and Circulation Anomalies during Spring Sowing Period in Shanxi Province
摘要
Abstract
Based on the precipitation data of 72 national meteorological stations in Shanxi province,monthly mean reanalysis data of NECP/NCAR and UKMO HADISST1 sea surface temperature data from April to May in 1961-2020,the temporal-spatial variations of precipitation and circulation anomalies features are analyzed during spring sowing period,by using EOF,climatic tendency,moving average,wavelet and composite analysis.The results show that:(1)There are three main modes of precipitation during spring sowing period in Shanxi province,which are completely consistency,north-south distribution,north-south and central distribution type,accounting for 63.3%,25%and 11.7%respectively.(2)The increasing trend of precipitation is unobvious in spring sowing period,it experiences five variation phases and has two oscillation periods of 2-3 a and 12-13 a.(3)In the abnormal rainy years,the 850 hPa wind field exhibits prevailing southerly airflow in mid-eastern China,the 500 hPa geopotential height and sea level pressure field shows the patterns of"higher in the east and lower in the west"and"higher in the north and lower in the south",respectively.Besides,the equatorial middle-east Pacific,Indian Ocean and Atlantic Ocean display the typical El Nino distribution,Dipole distribution and Triode distribution in early winter,respectively.However,the features of circulation and sea surface temperature are opposite in the abnormal rainless years.关键词
春播期/降水/大气环流/海温/山西省Key words
spring sowing period/precipitation/atmospheric circulation/sea surface temperature/Shanxi province分类
天文与地球科学引用本文复制引用
袁杰,魏凤英,马晓玲..山西省春播期降水时空变化及环流异常特征[J].沙漠与绿洲气象,2023,17(6):133-140,8.基金项目
山西省气象局科研项目(SXKMSDW20195636) （SXKMSDW20195636）
阳泉市重点研发项目(2019Z10) （2019Z10）
