摘要
选取商丘市8个观测站1961-2007年共47 a气象实测资料,分析了商丘大风时空分布特征,同时对大风日数减少的原因进行简要剖析,并探讨了产生大风的天气形势。结果表明:商丘大风日数具有明显的年代际变化,总体呈减少趋势;月、季变化明显,4月最多,9月最少,春季最多,秋季最少。大风日数随年代减少与气候变暖及防护林带面积增加有关。产生大风的天气系统为中小尺度(阵性风),地面形势为南高北低和东高西低形势(南风)以及冷锋过境(偏北风)。
We selected meteorological observational data of 8 observation stations in Shangqiu from 1961 to 2007, analyzed spatial and temporal distribution characteristic of the gales, explored briefly the reasons for gales generation, and discussed the synoptic situation which the gales engendered. The results showed gale days in Shangqiu had obvious interdecadal change and decreased as the whole; monthly and seasonal changes are obvious, most in April and spring, least in September and autumn. The windy days reduced with time is related to global warming and sheherbehs area increasing. The synoptic system of gale weather mainly are small and medium - scale （ array wind） , the surface situation of north high - south low and east high west low （south wind） and the cold front injection （northerly wind）.
出处
《气象与环境科学》
2009年第B09期74-77,共4页
Meteorological and Environmental Sciences
关键词
大风
大风日数
气候特征
天气形势
gale
windy days
climatic characteristic
weather situation
