Glacier thickness and ice volume of the Northern Andes

Glacier thickness and ice volume of the Northern Andes
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DOI:
10.1038/s41597-022-01446-8
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发表时间:
2022-06-15
期刊:
影响因子:
9.8
通讯作者:
Minaya, Veronica G.
Minaya, Veronica G.
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Van Wyk de Vries, Maximillian;Carchipulla-Morales, David;Wickert, Andrew D.;Minaya, Veronica G.

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热带冰川融化为周围社区提供了宝贵的水,但气候变化预计将导致许多冰川在下个世纪内消亡。了解热带冰川的未来需要对其厚度和体积的详细记录,而北安第斯山脉目前缺乏这些记录。我们使用六种不同的方法计算了哥伦比亚和厄瓜多尔所有冰川当前(2015-2021)的冰厚度,并将它们组合成多模型集合平均冰厚度和体积图。我们将我们的结果与现有的现场测量结果进行比较,结果表明厄瓜多尔和哥伦比亚目前的冰量分别为 2.49±0.25km3 和 1.68±0.24km3。我们在委内瑞拉剩余的冰层上没有检测到任何动静。该地区的总冰量为 4.17±0.35 平方公里,是之前最佳估计值 8.11 平方公里的一半。这些数据可用于更好地评估水资源状况和分布,作为未来冰川变化模型的输入,并评估与冰覆火山相关的区域地质灾害。
Tropical glacier melt provides valuable water to surrounding communities, but climate change is projected to cause the demise of many of these glaciers within the coming century. Understanding the future of tropical glaciers requires a detailed record of their thicknesses and volumes, which is currently lacking in the Northern Andes. We calculate present-day (2015–2021) ice-thicknesses for all glaciers in Colombia and Ecuador using six different methods, and combine these into multi-model ensemble mean ice thickness and volume maps. We compare our results against available field-based measurements, and show that current ice volumes in Ecuador and Colombia are 2.49 ± 0.25 km3 and 1.68 ± 0.24 km3 respectively. We detected no motion on any remaining ice in Venezuela. The overall ice volume in the region, 4.17 ± 0.35 km3, is half of the previous best estimate of 8.11 km3. These data can be used to better evaluate the status and distribution of water resources, as input for models of future glacier change, and to assess regional geohazards associated with ice-clad volcanoes.
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