古里雅冰帽区天气气候特征的分析  

Preliminary Analyses on the Synoptic and Climatic Features in Guliya Ice Cap Region

作　　者：章新平[1] 姚檀栋[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所

出　　处：《冰川冻土》1993年第3期460-466,共7页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金;中国科学院基金

摘　　要：本文给出了1991年5月中美冰川考察队对西昆仑山古里雅冰帽区的部分考察结果,初步分析了该区冰雪区和非冰雪区的温度、环流变化特点。结果表明,该区的非冰雪区的温度变化幅度大于冰雪区;非冰雪区盛行偏西风,这与冰雪区强烈冷却作用形成的冷空气下沉有关;来自冰雪区的空气温度低、湿度大,来自非冰雪区的空气温度高、湿度小;在冰雪区和非冰雪区的过渡带,可能存在冰川锋现象,它为解释冰雪区与非冰雪区之间的温度差异、风向突变以及第二大降水高度的存在提供了依据。Some of results from China-United States glaciological expedition to Guliya Ice Cap region in May, 1991 are shown in this paper, which preliminarily analyzes the variable features of the air temperature and circulation in the snow-ice cover and snow-ice free regions in the Guliya area. The results are as follows: 1) the variable range of the temperature in the snow-ice free region is larger than that in the snow-ice cover region. 2) the biased west windwas prevaling in the snow-ice free region, which is related to the sink of cold air formed under the strong cooling effect in the snow-ice cover region. 3) the air masses from the snow-ice cover region are of low temperature and high humidity, but in reverse in the snow-ice free region. 4) there may be a phenomenon called as glaciological front in the transition zone between the snow-ice cover and snow-ice free regions, which provides the foundations to interpret the temperature difference and the jump of wind direction in both regions, as well as the second extreme precipitation-elevation.

关 键 词：古里雅 冰帽 温度 环流 气候 天气 

分 类 号：P462[天文地球—大气科学及气象学]