中文摘要：

比较了气象台站观测和卫星遥感（SMMR、SSM/I、AMSR-E）的积雪深度两种资料在空间分布、年际变化及其与中国夏季降水之间关系的异同性.结果表明：两种资料在积雪稳定区的分布比较一致,积雪深度的大值区位于东北地区、新疆北部和青藏高原地区;对于季节性积雪区且积雪深度不大的区域而言,二者之间存在着较大的差异,尤其在江淮流域及长江中下游地区,台站观测的积雪深度大于遥感得到的积雪深度;平均而言,两种资料获得的积雪深度在各地区基本一致.在新疆北部和高原南部,二种资料的年际变化存在着差异,在新疆北部,台站观测大于遥感得到的积雪深度,而在高原东南部遥感大于台站观测积雪.近30a来,两种资料获得的积雪深度在新疆北部和青藏高原的年际变化趋势基本一致,新疆北部为增加趋势,青藏高原有减少的趋势.值得注意的是,在东北地区,近30a来两种类型资料的年际变化趋势呈相反变化.两种资料在新疆北部的相关最强;东北、青藏高原其次;而高原东南部最差,在使用时应加注意.青藏高原地区的两种积雪资料与中国夏季降水的相关＂信号＂基本一致.青藏高原地区积雪与东北西部地区和长江中下游夏季降水之间的相关最为显著.资料间的差异性并不影响高原地区积雪对中国夏季降水＂信号＂的应用.

英文摘要：

Temporal-spatial distributions of snow depths from meteorological observation and from satellite（SMMR,SSM/I and AMSR-E passive microwave remote sensing） are compared in this paper.The relationship between summer precipitation in China and snow in the Tibetan Plateau is analyzed.It is found that the snow depth maximum is in Northeast China,Northern Xinjiang and the Tibetan Plateau,showing a similar distribution pattern between the two snow data sources in the stable snow cover period.Two data sources have obvious difference in seasonal snow cover regions,especially in the Huihe River basin and the Yangtze River basin,where the observed snow depth is greater than that from satellite remote sensing.On average,snow depth from the two data sources in the three regions（Northeast China,Northern Xinjiang and the Tibetan Plateau） is the same.However,there are some differences in annual variation and changing trend in Northern Xinjiang and southeast of the plateau.In the southeast of the plateau,the observed snow depth is greater than that from remote sensing,but in the Northern Xinjiang it is inversed.In the past 30 years,snow depths of the two sources in Northern Xinjiang and the Tibetan Plateau have had same annual changing trend,with an increasing trend in Northern Xinjiang and a decreasing trend in the plateau.It is noteworthy that snow depth from the two data sources in Northeast China has showed an inverse variation in recent 30 years.The correlation between two data sources is significant in the Northern Xinjiang,Northeast China and the plateau.Therefore,the ＂signal＂ of the two data sources over the plateau providing to summer precipitation prediction in East China is equal.The difference between the two data sources do not affect the application of snow ＂signal＂ in the plateau to predicate summer precipitation in East China.