A digital glacier database for svalbard
A digital glacier database for svalbard
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斯瓦尔巴群岛数字冰川数据库
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Pettersen
中科院分区：
文献类型：
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作者：
M. König;C. Nuth;J. Kohler;G. Moholdt;R. Pettersen
斯瓦尔巴特群岛目前约有33,200平方公里的冰川，有大量的小山谷冰川以及大片毗连的冰原和冰帽。虽然第一份冰川清单是在1993年编制的，但还没有现成的数字版本。在这里，我们介绍了一个新的数字冰川数据库，该数据库正通过Glims项目(来自空间的全球陆地冰测量)提供。1936、1966-1971、1990和2001-2010年的冰川轮廓已经创建。对于大多数冰川，都有不止一年的冰川轮廓。2001-2010年的数据集提供了斯瓦尔巴特群岛的完整覆盖范围。冰川轮廓是以挪威极地研究所斯瓦尔巴群岛原始地形图系列的地图数据为基础，通过划定个别冰川和冰流，指定与水文流域有关的唯一识别代码，将中心线数字化，并为每个冰川掩膜提供若干属性来创建的。2001-2010年冰川轮廓是从SPOT-5和ASTER卫星传感器获得的经过正射校正的卫星图像得出的。在覆盖所有时间段的地区，观察到绝大多数冰川在1936年至2010年期间持续消退。
The archipelago of Svalbard presently contains approximately 33,200 km2 of glaciers, with a large number of small valley glaciers as well as large areas of contiguous icefields and ice caps. While the first glacier inventory was compiled in 1993, there has not been a readily available digital version. Here we present a new digital glacier database, which is being made available through the GLIMS project (Global Land Ice Measurements from Space). Glacier outlines have been created for 1936, 1966–1971, 1990, and 2001–2010. For most glaciers, outlines are available from more than one of these years. Complete coverage of Svalbard is available for the 2001–2010 dataset. Glacier outlines were created using cartographic data from the original Norwegian Polar Institute topographic map series of Svalbard as the basis by delineating individual glaciers and ice streams, assigning unique identification codes relating to hydrological watersheds, digitizing centerlines, and providing a number of attributes for each glacier mask. The 2001–2010 glacier outlines are derived from orthorectified satellite images acquired from SPOT-5 and ASTER satellite sensors. In areas where coverage for all time periods is available, the overwhelming majority of glaciers are observed to be in sustained retreat over the period from 1936 to 2010.