利用河西走廊东部5个气象站1961 -2007年逐月积雪深度、积雪日数和沙尘天气的常规观测资料,分析了河西走廊东部冬春季积雪深度、积雪日数和春夏季沙尘日数的时空变化特征,进而探讨河西走廊东部冬春季积雪与春夏季沙尘天气的关系.结果表明:受海拔高度、地理位置以及天气系统等影响,河西走廊东部积雪从东南向西北递减,高海拔地区的积雪多于低海拔地区；沙尘日数从西北向东南递减,低海拔地区的沙尘日数明显多于高海拔地区.河西走廊东部冬春季积雪与春夏季沙尘日数呈显著负相关.积雪深度与沙尘日数的负相关性高于积雪日数与沙尘日数的负相关性；冬春季积雪对春季沙尘的影响大于对夏季沙尘的影响；山区积雪与沙尘日数的相关性高于平原区积雪与沙尘日数的相关性.%Based on conventional observational data of monthly snow cover days and depths, as well as number of sand-dust weather days of five meteorological stations over Eastern Hexi Corridor from 1961-2007, the temporal-spatial variation characteristics of snow cover days and depths from winter to spring and number of sand-dust weather days from spring to summer were analyzed. The relationships between accumulated snow cover from winter to spring and sand-dust weather from spring to summer over Eastern Hexi Corridor were also discussed. The results show that the spatial distribution of snow cover depths and days decreased from the southeast to the northwest resulting from altitude changes, geographical location and weather influence. Snow cover days and depths were greater in high altitude areas than in low altitude areas. In contrast, the number of sand-dust weather days decreased from the northwest to the southeast. The number of sand-dust weather days were obviously more in low altitude areas than in high altitude areas. There were significantly negative correlations between number of sand-dust weather days and snow cover days and depths. The negative correlation was stronger with snow cover depths than with snow cover days. The impact of snow cover from winter to spring on the number of sand-dust weather days was bigger in spring than in summer. The negative correlation between number of sand-dust weather days and snow cover days was clearly bigger in mountain areas than in plains.
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