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投稿时间：2012-11-18 修订日期：2012-12-16
投稿时间：2012-11-18 修订日期：2012-12-16
中文摘要: 2012年10月环流特征如下：北半球高纬度地区为单一极涡，强度较常年同期偏弱，中高纬环流呈现4波型，欧亚地区中高纬环流经向度较常年偏大，南支槽偏强，西太平洋副热带高压强度偏弱。10月，全国平均降水量为29.1 mm，比常年同期(36.9 mm)偏少18.9%，全国平均气温为10.3℃，与常年同期（10.3℃）持平。月内，冷空气活动频繁，先后有4次冷空气过程影响我国；受台风山神影响，我国华南地区出现一次强降水过程；西南地区阴雨寡照天气及华南秋旱天气持续，在中下旬均有所好转；我国中东部大部地区出现雾霾天气；个别地区出现低温冰冻、局地洪涝及风雹灾害。
中文关键词: 冷空气， 台风， 雾霾， 大气环流
Abstract:The following are the main characteristics of the general atmospheric circulation in October 2012. There was one weak polar vortex center in the Northern Hemisphere. The circulation presents a four wave pattern in middle high latitudes. The meridional circulation is more obviously, the south branch trough and the West Pacific subtropical high are stronger than normal years’. The monthly mean precipitation is 29.1 mm, and is 18.9% less than normal. The monthly mean temperature is 10.3℃, and is equivalent to normal. There were four cold air processes affecting China. Typhoon Son Tinh made landfall in South China and brought a heavy rainfall process. The rainy weather in Southwest China and the autumn drought in South China are continued, but improved in both the mid and late October. Parts of the middle and east of China suffered from fog disasters. The individual parts of China suffered from low temperature freezing damage, local flooding and hail disasters.
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| Author Name | Affiliation |
| HU Haichuan | National Meteorological Centre, Beijing 100081 |
引用文本：
胡海川,2013.2012年10月大气环流和天气分析[J].气象,39(1):123-128.
HU Haichuan,2013.Analysis of the October 2012 Atmospheric Circulation and Weather[J].Meteor Mon,39(1):123-128.
胡海川,2013.2012年10月大气环流和天气分析[J].气象,39(1):123-128.
HU Haichuan,2013.Analysis of the October 2012 Atmospheric Circulation and Weather[J].Meteor Mon,39(1):123-128.