【摘要】 利用一套格点化的中国区域逐月降水观测资料和NCEP/NCAR逐月再分析资料对山西省1961—2020年夏季降水分布及其与前冬ENSO事件的关系进行了讨论，结果表明，山西夏季降水多且集中，累计降水量大值区主要集中在晋东部太行山脉附近。晋中部呈东北-西南向带状区域及晋南部运城等地的夏季降水与前冬中东太平洋海温表现出一致正相关，当前冬中东太平洋海温异常偏高（低）时，次年夏季该区域表现为降水偏多（少）。合成分析表明在El Ni?o次年夏季，西北太平洋反气旋异常强盛，山西地区为一致的偏北风，异常反气旋外围的引导的偏西暖湿气流与偏北气流在30°N附近交汇，同时山西省上空有异常显著上升运动，有利于该区域对流的发生和降水的增多；在La Ni?a次年夏季，西北太平洋区域为一弱的异常气旋，山西地区主要受异常偏东气流影响，高纬偏北风较弱，不利于冷暖空气的交汇，山西上空大部分上升运动不明显，不利于降水的产生。更多还原

【Abstract】 Based on a set of gridded monthly precipitation observations in China and NCEP/NCAR monthly reanalysis data,the distribution of summer precipitation in Shanxi Province from 1961 to 2020 and its relationship with previous winter(DJF)ENSO events were discussed in this study. The results showed that the precipitation in summer of Shanxi is abundant and concentrated,and the areas with large accumulated precipitation is mainly concentrated near the Taihang Mountains. The summer precipitation in the northeast-southwest belt-like area in central Shanxi Province and in southern Shanxi(i. e Yuncheng area)showed a consistent positive correlation with the SST in the central and eastern Pacific. In the mature winter of ENSO,the SST in the central and eastern Pacific is abnormally high(low),the precipitation of the regions mentioned above is more(less)in summer. Synthetic analysis shows that in the decaying summer of El Ni?o,the northwestern Pacific anticyclone is abnormally strong,and the Shanxi region is characterized by a consistent northerly wind. At the same time,there is an abnormally significant upward movement over Shanxi Province,which is conducive to the occurrence of convection and the increase of precipitation in this region. While,in the decaying summer of La Ni?a,there is a weak anomalous cyclone in the northwestern Pacific Ocean. Shanxi is mainly affected by anomalous easterly air flow,and the northerly wind at high latitudes is weak,which is not conducive to the convergence of cold and warm air. Also,there is weakly rising movement over Shanxi Province,which is not conducive to the production of summer precipitation.更多还原