中国近50a积雪日数与最大积雪深度的时空变化规律  

Spatial-Temporal Variations of Snow Cover Days and the Maximum Depth of Snow Cover in China during Recent 50 Years

作　　者：王春学[1] 李栋梁[1] 

机构地区：[1]南京信息工程大学大气科学学院/气象灾害省部共建教育部重点实验室,江苏南京210044

出　　处：《冰川冻土》2012年第2期247-256,共10页Journal of Glaciology and Geocryology

基　　金：2010年公益性行业(气象)科研专项(GYHY201006038);国家重点基础研究发展计划(973计划)项目(2007CB411506);江苏高校优势学科建设工程资助项目(PAPD)资助

摘　　要：通过REOF和非参数Mann-Kendall趋势检验法,以1958/1959-2007/2008年度中国557个气象台站的积雪观测资料为基础,对中国积雪日数与最大积雪深度的时空演变规律进行分析.结果表明:东北、新疆北部和青藏高原中东部为中国积雪日数和最大积雪深度的3个大值区;近50a来,春、秋季中国积雪日数和最大积雪深度在整体上呈现缓慢减少的趋势,冬季积雪日数和最大积雪深度呈现增加的趋势.气温是影响积雪产生和维持的重要因素.On the basis of the snow cover observation data from 557 weather stations in China during the period 1958/1959-2007/2008,the spatial-temporal variations of snow cover days and the maximum depth of snow cover are analyzed with the methods of REOF combining with Mann-Kendall nonparametric trend test.It is found that Northeast China,north of Xinjiang Region and the middle-eastern Tibetan Plateau are the areas with high values of snow cover days and maximum depth of snow cover.In recent 50 years,it seems that a slowly decreasing trend of snow cover days and the maximum depth of snow cover take place in spring and autumn,but not in winter.Air temperature is an important factor controlling the duration and the maximum depth of snow cover.

关 键 词：积雪日数 最大积雪深度 REOF MANN-KENDALL检验 

分 类 号：P426.635[天文地球—大气科学及气象学]