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投稿时间：2011-08-20 修订日期：2011-09-01
投稿时间：2011-08-20 修订日期：2011-09-01
中文摘要: 2011年7月环流特征如下：北半球高纬度地区极涡呈多极型分布，西太平洋副热带高压较常年偏弱，欧亚中高纬盛行纬向环流，多短波槽活动。7月，全国平均降水量为105.8 mm，较常年同期（115.9 mm）偏少8.7%。全国平均气温为22.1℃，较常年同期（21.4℃）偏高0.7℃。月内，我国主要天气气候事件有：全国共出现7次强降水过程，但没有发生大范围持续性的严重洪涝灾害；4个热带气旋生成但只有一个登陆我国；新疆、内蒙古西部、江南、华南、江汉、江淮、黄淮、华北等地相继出现高温天气。
中文关键词: 副热带高压， 暴雨， 高温， 热带气旋， 大气环流
Abstract:The following are the main characteristics of the general atmospheric circulation in July 2011. There were several polar vortex centers in the Northern Hemisphere. The West Pacific subtropical high is weaker than normal years. In middle high latitudes of Eurasia, the zonal circulation is prevailing with activities of many short wave troughs. The monthly mean precipitation is 105.8 mm, and is 8.7% less than normal (115.9 mm). The monthly mean temperature is 22.1℃, and is 0.7℃ higher than normal (21.4℃). The main weather events in July include seven times of heavy rainfalls. There were 4 tropical cyclones generated but only one landing China. Extreme high temperature weather consecutively occurred in Xinjiang, western Inner Monglia, South of the Yangtze River, South China, Yangtze River, Hanshui Basin, Yangtze River Huaihe Basin, Yellow River Huaihe Basin, North China, etc.
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基金项目:国家重点基础研究发展计划（973计划）（2009CB421504）、国家自然科学基金项目（40905029，40921160381）和公益性行业(气象)科研专项（GYHY201006008）共同资助
| Author Name | Affiliation |
| Yu Chao | National Meteorological Centre, Beijing 100081 |
引用文本：
于超,2011.2011年7月大气环流和天气分析[J].气象,37(10):1314-1319.
Yu Chao,2011.Analysis of the July 2011 Atmospheric Circulation and Weather[J].Meteor Mon,37(10):1314-1319.
于超,2011.2011年7月大气环流和天气分析[J].气象,37(10):1314-1319.
Yu Chao,2011.Analysis of the July 2011 Atmospheric Circulation and Weather[J].Meteor Mon,37(10):1314-1319.