1976-2016年普若岗日冰川和流域湖泊变化及其对气候变化的响应  

The Variation of Purog Kangri Glacier and Basin Lake and Its Response to Climate Change During 19762016

作　　者：拉巴[1] 拉巴卓玛[1] 边多 拉珍 La Ba;La Bazhuoma;Ben dor;La Zhen(Tibet Institute of Plateau Atmospheric and Environ Mental Science,Lhasa 850001,China;Climate Center of Tibet Autonomous Region,Lhasa 850001,China)

机构地区：[1]西藏高原大气环境科学研究所,拉萨850001 [2]西藏自治区气候中心,拉萨850001

出　　处：《气象与环境科学》2024年第2期54-61,共8页Meteorological and Environmental Sciences

基　　金：第二次青藏高原综合科学考察项目(2019QZKK0105-06);国家自然科学基金项目(42061014)。

摘　　要：基于藏北地区普若岗日冰川1976-2016年多时相Landsat系列卫星影像数据,以及气温、降水量数据,采用ARCGIS空间分析、线性趋势分析、相关分析等方法,研究了普若岗日冰川和流域湖泊面积变化及其对气候变化的响应。结果表明:近41年普若岗日冰川面积呈显著退缩趋势,41年内冰川面积减少了52.32 km^(2),减小率为12.01%;冰川西北部退缩最为严重,冰川面积减少了12.29 km^(2),减小率为15.77%;且冰川西北部、北部、东部和东南部末端消融显著;其他区域也有不同程度的退缩。流域湖泊面积呈显著增长趋势,共增长了27.17 km^(2),增长率为22.22%;流域气温总体上呈显著增加趋势,平均每10年增加0.48℃;降水量呈不显著上升趋势,平均每10年增加15 mm。降水对冰川和流域湖泊面积影响较小,温度的持续升高是冰川和流域湖泊变化的主要因素。Using multi-temporal Landsat series satellites dataset,temperature and precipitation data,and ARCGIS spatial analysis,linear trend analysis,correlation analysis methods,the area variations of glaciers and lakes in the Purog Kangri basin during 19762016 and its responds to climate change were studied.The results showed that the glacier area of Purog Kangri significantly retreated in the past 41 years,with the glacier area decreased 52.32 km^(2),12.01%.The retraction in northwestern glaciers(NW)was most severe,which is 12.29 km^(2),15.77%.The ablation of Purog Kangri Glacier was more pronounced at the end of northwestern(NW),northern(N),eastern(E)and southeastern(SE),with other areas retreat in different extent.The area of lake in the glacial basin showed a significant increase trend,and the area increased by 28.57%,27.17 km^(2).The temperature in glacial basin showed a significant trend of increase,averaged at 0.48℃per 10 years.The precipitation showed a non-significant upward trend,with an average increase of 15 mm per 10 years.The continuous increase of temperature is the main factor for the change of glaciers and basin lakes,while precipitation has little effect.

关 键 词：普若岗日 冰川 湖泊面积 气候变化 

分 类 号：P461.5[天文地球—大气科学及气象学]