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投稿时间：2011-01-20 修订日期：2011-01-30
投稿时间：2011-01-20 修订日期：2011-01-30
中文摘要: 2010年12月环流特征如下：极涡强度偏弱，但在东亚向中纬度伸展，有利于冷空气积聚南下，北半球中高纬呈现4波型，副高位置偏东，南支槽活动略偏强。12月，全国平均降水量为18.0 mm，比常年同期偏多83.7%，而华北、黄淮中西部等地偏少8成以上，这些地区气象干旱发展。12月，全国平均气温为-3.8 ℃，比常年同期偏高0.1 ℃。月内有4次冷空气袭击我国大部地区，东北部分地区及内蒙古东部、新疆北部遭受雪灾。
中文关键词: 冷空气， 暴雪， 干旱
Abstract:The following are the main characteristics of the general atmospheric circulation in December 2010. There was one weak polar vortex center in the Northern Hemisphere, which was extending to middle latitudes in East Asia, guided cold air going down south. The circulation presents a four wave pattern in middle high latitudes. The subtropical high is more easterly than normal years. The south branch trough is slightly stronger than normal years. The monthly mean precipitation (18.0 mm) is 83.7% above normal, but is 80% less than normal in North China, central west Huang Huai Plain etc., and increases drought in these areas. There were four cold air processes affecting most areas of China, including part of Northeast China, and Inner Mongolia and northern Xinjiang suffered snow disasters.
keywords: cold air, severe snow, drought
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基金项目:国家自然科学基金青年基金项目（40805021）资助
| Author Name | Affiliation |
| ZHANG Hengde | National Meteorological Center, Beijing 100081 |
| HUANG Wei | National Meteorological Center, Beijing 100081 |
引用文本：
张恒德,黄威,2011.2010年12月大气环流和天气分析[J].气象,37(3):363-368.
ZHANG Hengde,HUANG Wei,2011.Analysis of the December 2010 Atmospheric Circulation and Weather[J].Meteor Mon,37(3):363-368.
张恒德,黄威,2011.2010年12月大气环流和天气分析[J].气象,37(3):363-368.
ZHANG Hengde,HUANG Wei,2011.Analysis of the December 2010 Atmospheric Circulation and Weather[J].Meteor Mon,37(3):363-368.