华北汛期降水异常与100hPa高度场异常的关系  

THE RELATION BETWEEN THE ANOMALIES OF THE NORTH CHINA PRECIPITATION IN FLOOD SEASON AND THE ANOMALIES OF 100 HPA HEIGHT FIELD

作　　者：孙燕[1] 王谦谦[1] 钱永甫[2] 张友姝[1] 

机构地区：[1]南京气象学院大气科学系,南京210044 [2]南京大学大气科学系,南京210098

出　　处：《气象科学》2003年第4期418-425,共8页Journal of the Meteorological Sciences

基　　金：国家自然科学基金 4 0 175 0 2 1和 4 0 2 330 37联合资助

摘　　要：利用华北 17站 195 1～ 2 0 0 0年的逐月降水资料 ,与前期的 10 0hPa高度场 (195 8～ 1997年 )求相关 ,找到了 10 0hPa高度场影响华北地区汛期降水的关键影响区为 2 5°～ 35°N ,85°～ 10 5°E ,对应的关键影响时段为前一年 3～ 5月。然后用SVD方法证实了前一年春季正是与华北汛期降水相关最显著的时段 ;而所选关键区正是处于一种范围更大的 10 0hPa高度场空间分布型的关键部位 。In this paper the key area of 100 hPa height field which affected the North China precipitation in flood season is found, that is 25°～35°N and 85°～105°E, and its corresponding key time is from March to May in last year.The monthly precipitation data from 17 stations in North China from 1951 to 2000 are used to find the correlation with data of 100hPa height field from January in last year to December in this year .Then it's approved by SVD method that the last spring is the most notable period which affects the precipitation in flood season of North China, and the key area is the pivotal position of a more spatial type in 100 hPa height field; and the North China is the most notable area of the East China which is affected by key area in 100 hPa height field.

关 键 词：华北 汛期降水 SVD分析 

分 类 号：P461.2[天文地球—大气科学及气象学]