2010年夏季内蒙古干旱高温成因分析  

Analysis of drought and heat in Inner Mongolia in summer of 2010

作　　者：陈廷芝[1,2] 尤莉[2] 古月[3] 李金田[2] 

机构地区：[1]中国气象局兰州干旱气象研究所,兰州730020 [2]内蒙古气候中心,呼和浩特010051 [3]南京信息工程大学大气科学学院,南京210044

出　　处：《干旱区资源与环境》2012年第1期88-92,共5页Journal of Arid Land Resources and Environment

基　　金：中国气象局兰州干旱气象研究所干旱气象科学研究基金项目(IAM200903);内蒙古气象局科技创新项目(nmqxkjcx201001)资助

摘　　要：2010年夏季内蒙古降水为1961年以来最少,气温为1961年以来最高,异常的高温少雨使得干旱加重。文中利用数理统计方法,分析造成其原因主要有以下几个方面:850hPa中低纬度偏南气流极弱,不利于南支水汽向北输送;500hPa中高纬度高压脊控制着内蒙古地区,不利于降水而利于高温;在太平洋上,30°N-45°N海表温度偏高,使其上空500hPa太平洋中部大槽偏弱,影响日本海高压的建立和稳定,不利于内蒙古降水;南海夏季风极弱,且8月下旬夏季风北边缘才到达华北,形成整个夏季内蒙古降水少的严重形势。Inner Mongolia has had the least precipitation and the highest temperature in summer of 2010 since 1961 which caused the severe drought.Using the method of mathematical statistics,the analyzing results as follow.Weak south airflow at 850hPa mid and low latitude weakened the transportation of water vapor northward.The high ridge at 500hPa mid and high latitude stayed at Inner Mongolia were bad to precipitation but benefit to heat.High sea surface temperature in 30°N-45°N Pacific lead to weak Central Pacific Trough at 500hPa and affected the establishment and stability of Japan Sea High,and this was bad to the precipitation of Inner Mongolia.The summer monsoon of South China Sea was very week and the north edge of summer monsoon reached North China at late August,which lead to the severe situation of little precipitation in summer Inner Mongolia.

关 键 词：干旱 高温 大气环流异常 海温 夏季风 

分 类 号：P426.616[天文地球—大气科学及气象学]