【摘要】 利用浑善达克沙地11个站点1961～2000年扬沙和沙尘暴的观测资料,分析研究该地区沙尘暴天气的气候学特征,包括其地理分布、季节变化、年际和年代际变化等时空分布特征。结果表明,近40年来,浑善达克沙地东部沙尘暴出现日数在减少,而浑善达克沙地西部地区沙尘暴出现日数呈波动增加态势。沙尘暴出现日数的变化是特定气候变化的反映,同时下垫面条件的持续恶化是造成浑善达克沙地西部沙尘暴天气持续增加的重要原因。更多还原

【Abstract】 Using observed data of 11 meteorological stations on Hunshandake dust region from 1961 - 2000, climatic characteristics on dust storm of this region, including its geographical distribution and seasonal, yearly and decadal characteristics are analyzed. It shows that the dust days of eastern Hunshandake sandland decreased during the last 40 years, and the contrary result is received in the western Hunshandake sandland. The result shows the specific reflection of the climate change and the lasting depravation of underlying surface in this region is an important reason.更多还原