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首页> 外文会议>ISPRS Congress >MASS BALANCE CHANGES AND ICE DYNAMICS OF GREENLAND AND ANTARCTIC ICE SHEETS FROM LASER ALTIMETRY
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MASS BALANCE CHANGES AND ICE DYNAMICS OF GREENLAND AND ANTARCTIC ICE SHEETS FROM LASER ALTIMETRY

机译：来自激光高原的格陵兰和南极冰盖的大规模平衡变化和冰动力学

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摘要

During the past few decades the Greenland and Antarctic ice sheets have lost ice at accelerating rates, caused by increasing surface temperature. The melting of the two big ice sheets has a big impact on global sea level rise. If the ice sheets would melt down entirely, the sea level would rise more than 60 m. Even a much smaller rise would cause dramatic damage along coastal regions. In this paper we report about a major upgrade of surface elevation changes derived from laser altimetry data, acquired by NASA's Ice, Cloud and land Elevation Satellite mission (ICESat) and airborne laser campaigns, such as Airborne Topographic Mapper (ATM) and Land, Vegetation and Ice Sensor (LVIS). For detecting changes in ice sheet elevations we have developed the Surface Elevation Reconstruction And Change detection (SERAC) method. It computes elevation changes of small surface patches by keeping the surface shape constant and considering the absolute values as surface elevations. We report about important upgrades of earlier results, for example the inclusion of local ice caps and the temporal extension from 1993 to 2014 for the Greenland Ice Sheet and for a comprehensive reconstruction of ice thickness and mass changes for the Antarctic Ice Sheets.
机译：在过去的几十年里，格陵兰和南极冰盖在加速率时损失了冰，这引起了表面温度。两大冰盖的熔化对全球海平面上升产生了很大影响。如果冰盖完全融化，海平面将上升超过60米。即使较小的崛起也会沿着沿海地区造成剧烈伤害。在本文中，我们报告了由美国宇航局的冰，云和土地海拔卫星使命（ICOSAT）和空中地形映射器（ATM）和土地，植被（如空中地形映射）和空中激光活动（如空中地形映射（ATM）和土地，植被和冰传感器（LVIS）。为了检测冰盖高度的变化，我们开发了表面高度重建和变化检测（Serac）方法。它通过保持表面形状常数并将绝对值视为表面高度来计算小表面贴片的高度变化。我们报告了早期结果的重要升级，例如将本地冰盖和1993年至2014年的时间延期纳入格陵兰冰板，并为南极冰盖的冰厚度和质量变化的全面重建。

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