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本文主要利用常规观测资料、NCEP逐6h 1°×1°再分析资料和数值预报产品,对2010年4月13日和2011年4月2日三门峡市出现的两次寒潮过程进行了对比分析.结果表明:①前一次过程高空形势为横槽转竖型,后一次过程为低槽东移型,均为暴发寒潮天气的典型形势,且两次过程的高空冷中心强度一致.②两次过程的冷空气均在贝加尔湖附近聚集南下,且两次冷空气强度势力相当,不同之处在于前一次过程是冷空气的不断补充,导致最低气温不断下降,而后一次过程冷空气移速较快.③强盛的冷平流是造成两次过程气温骤降的主要原因.④在春季当欧洲数值产品连续五天预报850hPa降温幅度≥8℃时即考虑温度低谷期三门峡地区将有强降温过程.“,”Based on conventional observation data,NCEP 6h 1*1 reanalysis data and numerical forecast products, two cold wave happened on April 13,2010 and April 2,2011 in Sanmenxiawere analyzed comparatively. The re-sults showthat:①The situation of the first process is upper transverse trough,the second is the low trough east-ward,the two processes are the typical situations of cold wave and their high altitude cold center strength is of agreement.②The cool air both accumulates near Lake Baikal and move southward,and thetwo cold air strength is almost the same. The difference is that the first process is the continuous supply of cold air,causing the continu-ous declination of the lowest temperature,the second process is that the cold air has a faster moving speed.③The intense cold advection is the main reason of sudden drop in temperature of the both processes.④In spring,when the European numerical productshave a 850hPa temperature drops forecast of more than 8℃ for five days, that is considering Sanmenxia area will have strong cooling process in the period of low temperature.