2007年12月29日黑龙江省暴雪诊断分析  

Diagnosis of Snowstorm on December 29th 2007 in Heilongjiang Province

作　　者：张杰[1] 吴英[1] 闫中帅[1] 

机构地区：[1]黑龙江省气象台,黑龙江哈尔滨150030

出　　处：《黑龙江气象》2008年第4期7-10,共4页Heilongjiang Meteorology

摘　　要：本文使用常规观测资料、卫星云图及NCEP再分析资料对2007年12月28～30日发生在黑龙江省东部的大-暴雪天气进行了诊断分析。此次降雪天气发生在低涡暖湿切变北抬的过程中,降雪过程伴有高低空急流,高空急流的东向伸展促进了低涡的发展,低空急流形成为降雪输送了暖湿空气。水汽图像的特征可以表征大尺度环流特点及高空急流的发展演变,高空急流与边界及暗区相对应。物理量场上,大-暴雪落区发生在暖湿舌与冷空气侵入的西边界上。Using common observing data, satellite cloud image and reanalysis data of NCEP, a snowstorm on December 28-30th 2007 in the east of Heilongjiang province was diagnosed. The snowstorm occurred in the north- ward process of northeast vortex＇s warm and wet shear line. In the weather process, the high and low jet is always keeping. The stretched eastward high jet make the vortex developing. After the low jet formed, the warm and wet air was transferred to the snow area. The characteristic of water vapor image could show the large-scale circula- tion movement and the high jet development. In the water vapor image, the high jet was corresponding with the boundary and dark section. The physics fields show that the snowstorm happened on the west borderline of warm and wet tongue and invading cold air.

关 键 词：暴雪 急流 水汽图像 暖湿舌 

分 类 号：P426.634[天文地球—大气科学及气象学]