1980—2010年烟台市降水变化规律及时空分布特征分析

Analysis on Precipitation Variation Pattern and Temporal and Spatial Distribution Characteristics in Yantai City During 1980 to 2010

利用烟台市11个气象台站1980—2010年的地面观测资料,通过数理统计方法,对烟台地区降水的空间分布、年平均变化、季节变化及年际变化规律进行了分析。结果表明:烟台市降水量由南向北逐渐减少,降水日数为北多南少;近30年降水量呈现出57.362 mm/10年的增长趋势,降水日数为2 d/10年的减少趋势;四季降水分明,各季节的降水量年际变化较大,除秋季呈现出缓慢下降的趋势外,其他3季均为上升趋势。

Based on the surface meteorological observation data of 11 meteorological stations of Yantai City during 1980 to 2010,spatial distribution,annual average variation,seasonal variation and inter-annual variation patterns of precipitation in Yantai City were analyzed,using mathematical statistics method.The results showed that the amount of precipitation gradually decreased from the south to north of Yantai City ,but the days of precipitation in the north was more than that in the south.During the recent thirty years＇ period,the amount of precipitation increased by 57.362 mm while the days of precipitation decreased by 2 days in every ten years.The amount of precipitation varied greatly from season to season, and the amount of precipitation gradually decreased in autumn but increased in other seasons.