呼伦贝尔市2次强降水过程对比分析  

Comparison and Analysis of Two Heavy Precipitation Processes in Hulun Buir

作　　者：刘静 Liu Jing(Hailar Meterological Bureau of Hulun Buir,Hulun Buir 021008,Inner Mogolia,China)

机构地区：[1]呼伦贝尔市海拉尔气象局,内蒙古呼伦贝尔021008

出　　处：《绿色科技》2023年第22期25-28,共4页Journal of Green Science and Technology

摘　　要：利用常规观测资料、NCEP再分析资料,对呼伦贝尔市2022年7月4-9日和7月12-15日2次降水过程进行了对比分析,从大气环流背景和动力条件等方面探究了2次降水过程成因异同。结果表明:2次降水均呈现出降水持续时间长、范围广、强度大、局地性强的特点,其中4-9日过程影响系统为高空冷涡配合中低层低涡切变线,且系统较为垂直,地面为配合冷暖锋的地面气旋;而12-15日为高空冷槽影响,且中低层的低涡切变和中高层的冷槽有一定距离,即冷暖空气交汇面大,地面受气旋顶部倒槽影响。Based on conventional observation data and NCEP reanalysis data of national stations,two local heavy precipitation processes in Hulun Buir on July 4-9 and July 12-15,2022 were compared and analyzed to explore the similarities and differences of the causes of the two precipitation processes from the perspectives of atmospheric circulation background and dynamic conditions.The results show that both precipitation events exhibit characteristics of long duration,wide range,high intensity,and strong locality.The process on the 4th to 9th affects the system of high-altitude cold vortices combined with low-level low vortex shear lines,and the system is relatively vertical.Surface cyclones coordinated with cold and warm fronts on the ground.On the 12th to 15th,it is influenced by the high-altitude cold trough,and there is a certain distance between the low vortex shear in the middle and lower layers and the cold trough in the middle and upper layers.The intersection surface of cold and warm air is large,and the bottom surface is affected by the inverted trough at the top of the cyclone.

关 键 词：冷涡 切变线 地面气旋 倒槽 

分 类 号：P457.6[天文地球—大气科学及气象学]