卫星重力与光学遥感组合的念青唐古拉山脉冰川变化分析  

Analysis of glacier changes in the Nyainqentanglha Mountain based on the combination of satellite gravity and optical remote sensing

作　　者：周苗 常晓涛 朱广彬[1] 瞿庆亮 刘伟 ZHOU Miao;CHANG Xiaotao;ZHU Guangbin;QU Qingliang;LIU Wei(Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100048, China;College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China)

机构地区：[1]自然资源部国土卫星遥感应用中心,北京100048 [2]山东科技大学测绘与空间信息学院,青岛266590

出　　处：《测绘学报》2021年第10期1331-1337,共7页Acta Geodaetica et Cartographica Sinica

基　　金：高分对地观测重大专项(42-Y20A09-9001-17/18);民用航天预先研究项目(D010103);武汉大学地球空间环境与大地测量教育部重点实验室开放基金(18-01-05)。

摘　　要：利用GRACE(gravity recovery and climate experiment)和GRACE-FO重力卫星数据,反演了2002年8月至2020年4月间念青唐古拉山脉冰川质量变化,并结合光学遥感技术对念青唐古拉山脉西段冰川面积和储量变化进行估计。结果表明:①研究时段内念青唐古拉山脉冰川整体呈退缩趋势,2013年之后消融速度有所增加。②通过与夏季温度变化和降水异常对比,能够发现温度变化与冰川消融曲线相关性较好,降水在研究时段内持续减少,说明温度升高和降水减少是念青唐古拉山脉冰川质量常年亏损的主要原因。③念青唐古拉山脉西段冰川面积2003—2017年间共减少了72.30 km2,年均减少速率为5.16 km2/a,海拔5600~5800 m区间内冰川面积退缩最为明显。④卫星重力和光学遥感技术协同应用可以优势互补,既能快速定位变化剧烈的区域,又能对冰川信息进行精准提取,从而实现从大范围到小区域的多尺度监测。目前,两种技术联合应用方面仍存在一些不足,有待进一步研究。The GRACE and GRACE-FO gravity satellite data were used to retrieve the glacier quality changes in the Nyainqentanglha Mountains from August 2002 to April 2020,and combined with remote sensing technology to estimate the glacier area and reserves changes in the western Nyainqentanglha.The main conclusions are as follows:①The glaciers in the Nyainqentanglha Mountains showed an overall retreat trend during the study period,and there was an accelerated melting trend after 2013.②The correlation between temperature changes and glacier melting curves can be found by comparing with summer temperature changes and precipitation anomalies better,the precipitation continued to decrease during the study period,indicating that the increase in temperature and the decrease in precipitation are the main reasons for the continuous decrease in the mass of glaciers in the Nyainqentanglha.③The glacier area of the West Nyainqentanglha Mountains decreased by 72.30 km^(2) from 2003 to 2017,with an average annual decrease rate of 5.16 km^(2)/a.The glacier area retreats most obviously in the altitude range of 5600~5800 m.④The coordinated application of satellite gravity and optical remote sensing technology can complement each other’s advantages.It can not only estimate changes in glacier quality,but also detect changes in glacier area and elevation.At present,there are still some shortcomings in the joint application of the two technologies,which need to be further studied.

关 键 词：卫星重力 光学卫星遥感 冰川变化监测 念青唐古拉山脉 

分 类 号：P223[天文地球—大地测量学与测量工程]