闽北冬季两次雨雪过程对比分析  

Comparative analysis of the two rain and snow processes in northern Fujian

作　　者：罗旭 周博扬[2] 陈勇 张信华 

机构地区：[1]贵州省黔南州气象局,黔南州,558000 [2]沈阳农业大学 [3]福建省武夷山市气象局

出　　处：《福建气象》2012年第1期6-10,共5页

摘　　要：2010年冬季，闽北出现了两次雨雪天气过程。通过对两次过程高空环流形势、低空急流、地面冷空气和物理量的对比分析，结果表明：高空的环流形势决定了影响闽北冷空气的强度和路径；中、西路径的冷空气造成的影响要大于中、东路径；低空急流的位置对降雪落区和强度有很大影响；较大的降雪都出现在急流轴左侧的辐合区中；对流层低层干冷空气作为“冷垫”锲入暖湿气流中，促进锋生和暖湿空气的抬升、凝结；动力条件和水汽条件对判断降雪大小有指示作用。The comparative analysis are made between the two rain and snow processes in northern Fujian in 2010 winter, focusing on the high level circulation, low level jet, surface cold airmass and physics. The results indicate： l.High level circulation determined the intensity and passage of surface cold air. 2.The impact of cold air form west is more severe than east. 3.The location of low level jet has a great influence on the intensity of snow. The heavy snow fell on the left of jet axis. 4.Dynamics and moisture conditions play the key roles in predicting the snow storm.

关 键 词：福建 暴雪 低空急流 对比分析 

分 类 号：P42[天文地球—大气科学及气象学]