南极冰盖DEM机载测高验证与分析——以西南极Thwaites冰川为例  

Validation and Analysis of the Antarctic Digital Elevation Models Based on Airborne Altimetry——A Case Study of Thwaites Glacier,West Antarctica

作　　者：黄科伟[1,2] 李斐[1,2,3] 张胜凯[1,2] 郝卫峰[1,2] 肖峰[1,2] 袁乐先[1,2] 

机构地区：[1]武汉大学中国南极测绘研究中心,湖北武汉430079 [2]极地测绘科学国家测绘地理信息局重点实验室,湖北武汉430079 [3]国家领土主权与海洋权益协同创新中心,湖北武汉430079

出　　处：《测绘学报》2016年第5期544-551,共8页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金重点项目(41531069);国家自然科学基金(41176173);国家重大科学研究计划(2012CB957701;2013CBA01804);南北极环境综合考察及资源潜力评估项目(CHINARE2016)~~

摘　　要：利用冰桥计划(IceBridge)在西南极Thwaites冰川的机载激光测高数据,对ICESat卫星测高数据和目前国际常用的4种南极DEM,包括Bamber 1km DEM、ICESat DEM、RAMPv2DEM和JLB97DEM的精度进行了验证和分析。结果表明,ICESat卫星测高数据和ICESat DEM有着较高的高程可靠性,其与冰桥计划机载测高数据的平均高程差小于5m,标准差小于15m。Bamber 1km DEM高程可靠性相比ICESat卫星测高数据和ICESat DEM低一些。JLB97DEM、RAMPv2DEM与冰桥计划机载测高数据之间的标准差超过30m,尤其在坡度较大的区域,高程可靠性低。Based on the IceBridge airborne altimetry data collected over Thwaites Glacier,West Antarctica,the accuracy of ICESat satellite altimetry data and four widely used DEMs of Antarctica,i.e.,JLB97 DEM,RAMPv2DEM,ICESat DEM and Bamber 1km DEM were validated and analyzed.The results show that both of ICESat satellite altimetry data and ICESat DEM feature high reliability,with a bias less than 5mand a standard deviation less than 15 m.The reliability of Bamber 1km DEM is a bit lower than that of ICESat satellite altimetry data and ICESat DEM.The standard deviations of JLB97 DEM and RAMPv2 DEM comparing with IceBridge airborne altimetry data are larger than 30 m,and the reliabilities for JLB97 DEM and RAMPv2 DEM are low especially in the sloped areas.

关 键 词：南极 Thwaites冰川 冰桥计划 机载测高 数字高程模型 

分 类 号：P224[天文地球—大地测量学与测量工程]