乌兰察布市罕见暴雪的诊断分析  

Diagnostic Analysis on Infrequent Blizzard in Ulanqab City

作　　者：于文英 王树和 常永旺 王京平 

机构地区：[1]乌兰察布市气象局,内蒙古集宁012000

出　　处：《内蒙古气象》2011年第4期35-36,共2页Meteorology Journal of Inner Mongolia

摘　　要：利用常规资料、数值预报产品和T213格点资料,从环流形势、物理量场等方面对乌兰察布市2007年3月2—4日的罕见暴雪及强寒潮进行了诊断分析。结果表明:高空冷槽、中低层低涡、地面河套倒槽锋面,是导致这次降雪及强寒潮的主要影响系统。而东高西低的环流形势使得西南气流将长江中下游的水汽及能量源源不断输送到乌兰察布市上空,为强降雪提供了水汽及能量的来源,副高位置偏西或偏北以及下游的阻塞系统稳定维持是这次暴雪发生的关键。Using the conventional data,numerical forecast products and T213 grid data,the infrequent blizzard and strong cold wave were analyzed diagnostically from the circulation,physical quantity field in Ulanqab City on March 2,2007 to 4 rare Blizzard and the of.The results showed that high cold trough,low vortex,the ground reverse trough frontal surface,was the main influencing system for the snow and cold wave.The southwest airflow transported continuously moisture and energy of the middle and lower reaches of Changjiang River to Ulanqab City in situation of high east and low west circulation,and it provided moisture and energy for severe snowfall,the stabilized maintain of west or north subtropical high and downstream occlusion system was the key of this blizzard weather process.

关 键 词：高空冷涡 地面倒槽 降雪 

分 类 号：P458.1[天文地球—大气科学及气象学]