Large interannual variability in supraglacial lakes around East Antarctica.
Large interannual variability in supraglacial lakes around East Antarctica.
复制标题
DOI：
10.1038/s41467-022-29385-3
复制
发表时间：
2022-03-31
影响因子：
16.6
通讯作者：
Verjans V
中科院分区：
文献类型：
--
作者：
Arthur JF;Stokes CR;Jamieson SSR;Rachel Carr J;Leeson AA;Verjans V
南极冰上湖（SGLs）与冰架崩塌和随后的内陆冰流加速有关，但SGLs的观测仍然相对较少，其年际变化在很大程度上是未知的。这使得很难评估一些冰架是否接近气候变暖下的稳定阈值。在这里，我们提出了在多个融化季节（2014-2020年）整个东南极冰盖的SGL的第一次观测。在某些冰架上，SGL体积的年际变化>200%，但模式是高度异步的。更广泛，更深的SGLs与夏季（12月至1月至2月）气温较高，但与模拟融化和径流的比较是复杂的。然而，我们发现，模拟1月融化和11月积雪空气含量的比例，夏季融化的SGL体积的一些潜在的脆弱的冰架上的重要预测，这表明在SGL的大幅增加，预计在未来的大气变暖。南极冰上湖（SGLs）与冰架崩塌和随后的内陆冰流加速有关，但SGLs的观测仍然相对较少，其年际变化在很大程度上是未知的。这项新的研究表明，在东南极冰盖周围和冰架之间，湖泊的面积和体积每年都有很大的变化。
Antarctic supraglacial lakes (SGLs) have been linked to ice shelf collapse and the subsequent acceleration of inland ice flow, but observations of SGLs remain relatively scarce and their interannual variability is largely unknown. This makes it difficult to assess whether some ice shelves are close to thresholds of stability under climate warming. Here, we present the first observations of SGLs across the entire East Antarctic Ice Sheet over multiple melt seasons (2014–2020). Interannual variability in SGL volume is >200% on some ice shelves, but patterns are highly asynchronous. More extensive, deeper SGLs correlate with higher summer (December-January-February) air temperatures, but comparisons with modelled melt and runoff are complex. However, we find that modelled January melt and the ratio of November firn air content to summer melt are important predictors of SGL volume on some potentially vulnerable ice shelves, suggesting large increases in SGLs should be expected under future atmospheric warming. Antarctic supraglacial lakes (SGLs) have been linked to ice-shelf collapse and the subsequent acceleration of inland ice flow, but observations of SGLs remain relatively scarce and their interannual variability is largely unknown. This new study shows that lake area and volume vary substantially from year-to-year around the East Antarctic Ice Sheet and between ice shelves.
登录
查看更多内容
影响因子：
64.8
作者：
DeConto, Robert M.;Pollard, David
通讯作者：
Pollard, David
影响因子：
3.9
作者：
Arthern, Robert J.;Vaughan, David G.;Thomas, Elizabeth R.
通讯作者：
Thomas, Elizabeth R.
影响因子：
30.7
作者：
Bell, Robin E.;Banwell, Alison F.;Kingslake, Jonathan
通讯作者：
Kingslake, Jonathan
影响因子：
5.2
作者：
Buzzard, Sammie;Feltham, Daniel;Flocco, Daniela
通讯作者：
Flocco, Daniela
影响因子：
1.6
作者：
Banwell, Alison F.;Macayeal, Douglas R.
通讯作者：
Macayeal, Douglas R.