近48年内蒙古中西部地区高温日数时空特征及其环流特征分析  

Analysis on Spatial-temporal Characteristic of High-Temperature Days and Circulation Characteristic in Central and Western Regions of Inner Mongolia in Recent 48 Years

作　　者：王冰晨[1] 马清泽[2] 杨晶[3] 爱华[1] 

机构地区：[1]内蒙古气象信息中心,内蒙古呼和浩特010051 [2]内蒙古大气探测技术保障中心,内蒙古呼和浩特010051 [3]内蒙古气候中心,内蒙古呼和浩特010051

出　　处：《内蒙古气象》2009年第5期7-9,共3页Meteorology Journal of Inner Mongolia

摘　　要：利用1961—2008年内蒙古中西部地区5—9月逐日最高气温资料和国家气候中心提供的北半球500hPa高度场(5×10网格距)资料。定义了3种不同强度的最高温度日。统计了近48年5—9月各月不同强度最高气温发生频率,进行时空特征分析。分析日最高气温日数高发期的夏季(6—8月)强日最高气温日数典型年北半球500hPa高度距平场分布特征。结果表明:近48年5—9月各月日最高气温日数高发期在夏季(6—8月);7月最多,9月最少;气候变暖使得日最高气温日数有明显增加;日最高气温日数典型偏多年和典型偏少年的北半球500hPa高度距平场在欧亚大陆出现明显相反的分布特征。Using May-September daily maximum temperature data of the central and western regions of Inner Mongolia in 1961-2008 and the 500hPa height field （5 × 10 grid distance） data of Northern Hemisphere which were provided by the National Climate Center, maximum temperature days of three kinds of different strength were defined. The freque/acy of the maximum temperature was statistical analyzed under the condition of different strength from May to September in recent 48 years distribution characteristics of Northern Hemis （June-August） that is high-incidence season ph of and its spatial and temporal characteristics were analyzed. The ere 500hPa height anomaly field were analyzed in the summer the days of daily maximum temperature in the typical years of days of daily maximum temperature. The results showed that the high-incidence season of each month of the days of May-September daily maximum temperature nearly 48 years was. in summer （June-August） and July is the most, September is minimal. There is an obvious increase in the days of daily maximum temperature as a result of weather warming. Northern Hemisphere 500hPa height anomaly field in the Eurasian of the typical years which are on the high side and the low side of the days of daily maximum temperature present opposite distributed characteristics.

关 键 词：高温日数 分布特征 环流特征 

分 类 号：P423[天文地球—大气科学及气象学]