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。
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 precipi- tation is 29. 1 ram, 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 au- tumn 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-tem- perature freezing damage, local flooding and hail disasters.
出处
《气象》
CSCD
北大核心
2013年第1期123-128,共6页
Meteorological Monthly
关键词
冷空气
台风
雾霾
大气环流
cold air, Typhoon Son-Tinh, fog disasters, atmospheric circulation
