| 四种南极数字高程模型的精度比较与分析 |
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| 引用本文： | 肖峰,张胜凯,鄂栋臣,李斐,郝卫峰,袁乐先. 四种南极数字高程模型的精度比较与分析[J]. 冰川冻土, 2014, 36(3): 640-648. DOI: 10.7522/j.issn.1000-0240.2014.0077 |
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| 作者姓名： | 肖峰 张胜凯 鄂栋臣 李斐 郝卫峰 袁乐先 |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 摘 要： | 南极数字高程模型（DEM）是南极冰盖研究的基础数据，目前国际通用的全南极DEM数据主要有JLB97 DEM、RAMPv2 DEM、ICESat DEM以及Bamber 1km DEM. 利用DEM对DEM验证的方式对四种DEM的精度进行比较分析. 结果表明：Bamber 1km DEM和ICESat DEM之间的高程差异最小，平均高程差小于1.8 m，二者均有较高的可靠性. RAMPv2 DEM与Bamber 1km DEM的高程差大于1.9 m，在81.5° S以南和坡度较大的区域，高程差异更为明显，高程可靠性较低. JLB97 DEM与上述三种DEM的偏差超过10 m，高程可靠性最低.
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| 关 键 词： | 南极 冰盖 数字高程模型 卫星测高 ICESat |
| 收稿时间： | 2013-12-06 |
| 修稿时间： | 2014-03-19 |
Precision comparison and analysis of the four Antarctic digital elevation models |
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| XIAO Feng,ZHANG Shengkai,E Dongchen,LI Fei,HAO Weifeng,YUAN Lexian. Precision comparison and analysis of the four Antarctic digital elevation models[J]. Journal of Glaciology and Geocryology, 2014, 36(3): 640-648. DOI: 10.7522/j.issn.1000-0240.2014.0077 |
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| Authors: | XIAO Feng ZHANG Shengkai E Dongchen LI Fei HAO Weifeng YUAN Lexian |
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| Affiliation: | 1. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China;2. Key Laboratory of Polar Surveying and Mapping, National Administration of Surveying, Mapping and Geoinformation of China, Wuhan 430079, China |
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| Abstract: | 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. |
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| Keywords: | Antarctica ice sheet digital elevation model satellite altimetry ICESat |
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