摘要
利用柳州地面气象观测站1963~2007年地面气象观测资料,对柳州市灰霾天气的气候特征进行了分析。结果表明,柳州市灰霾日数12月最多,7月最少,秋冬两季占全年灰霾日数的70%以上。年灰霾日数总体呈上升趋势,其变化可分为3个阶段,其中20世纪60年代中后期到70年代末期是灰霾日数少而缓慢上升的阶段;20世纪70年代末期至80年代末期是急剧上升阶段;20世纪90年代初期至2007年灰霾日数为变化平稳但仍保持较高水平阶段。灰霾日数年际变化多与大气中的污染物浓度有关,而月、季的分布多受天气形势和气象条件控制。并对如何降低灰霾天气的发生频率,以及如何做好灰霾天气预测预警工作作了相关探讨。
According to the meteorological data of the ground from 1963 to 2007 observed by Liuzhou weather stations,this essay attempted to analyze the climatic characteristics of gloomy days in Liuzhou City.The results showed that gloomy days at most occur in Dec.and at least in July,and more than 70% gloomy days occur in autumn and winter.Actually there is an upward trend in the number of the yearly gloomy days which can be divided into three stages： the slowly rising development with a few cloudy days between the mid 1960s and the late 1970s;the sharply rising development between the late 1970s and the late 1980s and relatively balanced development but also with a severe level between the early 1990s and 2007.And the pollutants＇ density in the atmosphere exerts evident influences on the gloomy days＇ yearly variation,while monthly and quarterly distributions are mostly controlled by weather and meteorological conditions.This study also gave the directions to decrease the frequency of occurring gloomy weather and came up with some tactics to forecast and forewarn such weather.
出处
《安徽农业科学》
CAS
北大核心
2009年第1期252-253,256,共3页
Journal of Anhui Agricultural Sciences
关键词
灰霾
气候特征
对策初探
Gloomy
Meteorological characteristics
Countermeasures discussion
