1980～2009年辽宁省主要灾害性天气特征分析

Analysis on the Main Climate Characteristics of Disastrous Weather in Liaoning Province from 1980 to 2009

运用统计学方法，对1980～2009年辽宁省54个气象站的降水量、气温、风速和雾等资料进行分析。结果表明：辽宁省年平均降水量自西北向东南方向逐渐增多，近30年累年日最大降水量在100—325mm，其中丹东地区发生暴雨及特大暴雨的几率较大；全省年平均雾日在3．1～57．8d，呈缓慢上升趋势；大风雪过程平原和沿海地区多于丘陵山区，东部地区积雪深度最大；高温日数西北部地区多于南部沿海地区，低温日数东北部地区多于沿海地带；全省年平均高温日数呈上升趋势，而年平均低温日数呈下降趋势。

The precipitation, air temperature, wind speed and fog data in 54 weather stations in Liaoning Province from 1980 to 2009 were analyzed by statistical method. The results indicated that average annual precipitation increased gradually from northwest to southeast in Liaoning Province. The maximum daily precipitation was between 100 - 325 mm during rece.nt 30 years and Dandong area had big probability of the rainstorm and the extraordinary rainstorm. The yearly average fog occurrence in Liaoning province was between 3.1 days to 57.8 days and showed a slow increasing trend. There were more blizzards in plain and coastal area than in the hill and mountainous area. The maximum snow depth appeared in eastern China. The number of high temperature days in the northwest is more than that in the south coastal areas. The average high temperature days in the whole province showed an increasing trend, while the annual average low temperature clays presented a decreasing trend.