浑善达克沙地气候特征及其气候变化分析

利用浑善达克沙地及其周边气象台站1965～2001年气候资料，运用统计方法，分析浑善达克沙地主要气候因子的时空变化，结果表明：浑善达克沙地气候要素存在着明显的经向分异和一定程度的纬向分异；1965～2001年间，浑善达克沙地绝大部分地区的年平均气温呈明显上升趋势，季平均气温也有较明显的上升趋势，年平均风速变化有较明显的减小趋势，春季风速减小趋势最为明显；沙地大部年、季降水量变化趋势不甚明朗，年蒸发量呈较平缓下降趋势，年干湿度呈缓慢升高趋势。

Research on Climate and Climatic Changes in Hunshandake Sandy Land

On the basis of meteorological data from 1965 to 2001 around the Hunshandake sandy land, the characteristics of main climatic factors and their temporal and spatial variation regularities are analyzed. The research results indicate: there are obvious differences in main climatic factors along longitudes and less obvious along latitudes in the Hunshandake sandy land; from 1965 to 2001 in the most parts of the Hunshandake sandy land, the mean annual and seasonal temperatures had an evidently increasing tendency, and the mean annual wind velocity had an evidently decreasing tendency, especially in the spring; in the main part of the sandy land, the changing tendencies of annual and seasonal precipitation were not very clear, while there were slowly increasing tendencies in the annual dry/wet index, and not very clearly decreasing tendencies in annual evaporation.