1962-2008年辽宁省积雪变化特征

采用1962-2008年辽宁省52个气象观测站逐日积雪深度以及同期温度、降水资料，用统计方法和小波方法分析了辽宁省积雪气候变化规律。结果表明：近47 a辽宁省积雪日数呈不显著增加趋势，共增加了3 d；年最大雪深随时间变化呈不明显增加趋势，平均每10 a增加0.2 cm；年累积雪深也呈不显著增加趋势，气候倾向率为8.9 cm/10 a。从年代际变化来看，20世纪80年代前辽宁省积雪日数、年最大雪深和年累积雪深偏小；而20世纪80年代后至今，则经历了一个积雪日数、年最大雪深和年累积雪深均增加的过程。

Characteristics of snow cover from 1962 to 2008 in Liaoning province

Based on the daily snow cover depth,temperature and precipitation at 52 weather stations from 1962 to 2008,the characteristics of snow cover variation were analyzed using methods of a statistics and a wavelet analysis.The results indicated that the increasing trend of annual snow cover days is not significant and it only increases 3 d from 1962 to 2008.The increasing trend of annual maximum snow cover depth is also not significant with 0.2 cm/decade,so is that of annual cumulative snow cover depth with 8.9 cm/decade.The number of snow cover days,annual maximum snow cover depth and annual cumulative snow cover depth are all relatively small before 1980s in terms of their inter-decadal variations,while they all increase after 1980s.