Airborne Surface Profiling of Alaskan Glaciers, 1994 - 2001, Version 1

This data set consists of glacier outline, laser altimetry profile, and surface elevation change data for 46 glaciers in Alaska and British Columbia, Canada, measured with an airborne laser altimetry system. Six glaciers in the Alaska Range of central Alaska, two glaciers in the Wrangell Mountains of southcentral Alaska, 11 glaciers in the Chugach Mountains of southcentral Alaska, five glaciers in the Chigmit Mountains of southcentral Alaska, 13 glaciers in the Kenai Mountains of southcentral Alaska (comprising the Harding Icefield), one glacier in the St. Elias Mountains of southeast Alaska, one glacier in the Takhinsha Mountains of southeast Alaska, and seven glaciers in the Coast Mountains of southeast Alaska and British Columbia were profiled between 1994 and 2001. Surface elevation profiles are accurate to about 0.3 m. Long-term elevation changes can be estimated by comparison of these profiles with existing maps.本数据集涵盖加拿大阿拉斯加州与不列颠哥伦比亚省的46座冰川的冰川轮廓、激光测高剖面及表面高程变化数据，所有数据均通过机载激光测高系统（airborne laser altimetry system）采集获取。其中阿拉斯加中部的阿拉斯加山脉（Alaska Range）分布6座冰川，阿拉斯加中南部的朗格尔山脉（Wrangell Mountains）分布2座，阿拉斯加中南部的楚加奇山脉（Chugach Mountains）分布11座，阿拉斯加中南部的奇格米特山脉（Chigmit Mountains）分布5座，阿拉斯加中南部的基奈山脉（Kenai Mountains，包含哈丁冰原（Harding Icefield））分布13座，阿拉斯加东南部的圣伊莱亚斯山脉（St. Elias Mountains）分布1座，阿拉斯加东南部的塔钦沙山脉（Takhinsha Mountains）分布1座，以及阿拉斯加东南部与不列颠哥伦比亚省的海岸山脉（Coast Mountains）分布7座冰川，上述冰川的剖面测量工作均完成于1994年至2001年间。该表面高程剖面的测量精度可达约0.3米。通过将这些剖面与现有地图进行对比，即可估算得到冰川的长期高程变化情况。