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《Journal of Glaciology and Geocryology》 2014-03
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Precision comparison and analysis of the four Antarctic digital elevation models

XIAO Feng;ZHANG Shengkai;E Dongchen;LI Fei;HAO Weifeng;YUAN Lexian;Chinese Antarctic Center of Surveying and Mapping,Wuhan University;Key Laboratory of Polar Surveying and Mapping,National Administration of Surveying,Mapping and Geoinformation of China;  
The Antarctic ice sheet plays a major role in studies of global climate change and sea-level rise.Digital elevation models(DEM) are of fundamental importance to many geoscientific and environmental studies of the Antarctica.There are four widely used DEMs of Antarctica,i.e.,JLB97 DEM,RAMPv2 DEM,ICESat DEM and Bamber 1km DEM.The accuracy of these DEMs was assessed by mutual validation.The results show that both of Bamber 1km DEM and ICESat DEM feature high reliability with a bias less than 1.8 m.The elevation difference for RAMPv2 DEM compared to Bamber 1km DEM is larger than 1.9 m,while in the sloped areas and south of 81.5° S,the difference is much more obvious,and the reliability for RAMPv2 DEM in these areas is low.The reliability of JLB97 DEM is the lowest among the four DEMs with the bias larger than 10 m.
【Fund】: 国家重大科学研究计划项目(2012CB957701;2013CBA01804);; 国家自然科学基金项目(41176173);; 南北极环境综合考察及资源潜力评估专项(CHINARE2013;CHINARE2014);; 武汉大学珞珈青年学者项目资助
【CateGory Index】: P208
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