黄河河源区积雪变化及影响因素分析  

Analysis of the Changes in the Snow Mantle in the Yellow River Source Area and the Factors

作　　者：李丽[1] 郝振纯[1] 王加虎[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《人民黄河》2009年第5期72-73,76,共3页Yellow River

基　　金：国家自然科学基金重点项目(40830639);国家自然科学基金资助项目(40801012);教育部长江学者和创新团队发展计划资助项目(IRT0717)

摘　　要：利用遥感解译的积雪资料和测站观测资料,分析了几十年来黄河河源区积雪面积、各测站积雪深度和积雪日数的变化趋势以及气温、降水的变化趋势和幅度。结果表明:黄河河源区几十年来积雪的增加是主要积雪期的降水量增加对积雪年际变化的积极作用大于气温升高的负作用而引起的;在全球变暖的大背景下,未来河源区平均温度将不断上升,而降水量仅会小幅增加,气温升高对积雪的影响将逐渐赶上并超过降水增加的影响,从而使积雪的年际变化趋势发生转折,甚至导致部分地区终年无积雪出现。Analysis of the interpreted remote sensing data of the accumulated snow and monitoring data leads to the understandings.The outcomes show that a) the increase in snow mantle in the area where the Yellow River sources from in the past decades was caused by the effect of the increase in precipitation in the main snow accumulation period on annual change of the snow mantle overwhelms that of the increase in the local air temperature;b)in the future in the context of global warming,the effect of the increase in the local air temperature on the snow cover is to get close to and,further,overwhelm that of the mild increase of precipitation,consequently reversing the annual change tendency,and even make parts of the area have no calculated snow for ever.

关 键 词：气温变化 降水量 积雪变化 河源区 黄河 

分 类 号：P333[天文地球—水文科学] TV882.1[水利工程—水文学及水资源]