Observed interannual changes beneath Filchner-Ronne Ice Shelf linked to large-scale atmospheric circulation.

Observed interannual changes beneath Filchner-Ronne Ice Shelf linked to large-scale atmospheric circulation.
复制标题

观察到的菲尔希纳-龙冰架下方的年际变化与大规模大气环流有关。

DOI:
10.1038/s41467-021-23131-x
复制
发表时间:
2021-05-20
影响因子:
16.6
通讯作者:
Kanzow T
Kanzow T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Hattermann T;Nicholls KW;Hellmer HH;Davis PED;Janout MA;Østerhus S;Schlosser E;Rohardt G;Kanzow T

文献摘要

参考文献

被引文献

相似文献

漂浮的冰架是南极冰盖的致命弱点。它们限制了南极洲对全球海平面上升的贡献,但它们可能会被变暖的海洋从下面迅速融化。在菲尔奇纳-罗恩冰架,海冰形成的减少可能会在本世纪内增加基本融化速度并加速海洋冰盖的质量损失。然而,对这种临界点行为的理解在很大程度上依赖于数字模型。我们通过Filchner-Ronne冰架的五个热水钻孔进行的新的多年观测表明,自2015年以来,由于Ronne Polynya加强了风力驱动的海冰形成,密度驱动的冰架洞穴范围的环流加剧。罗恩冰架上增强的南风与阿蒙森海低位西移相吻合,将空穴环流与大尺度大气环流模式的变化联系在一起,成为大气-海洋-冰架系统的一个新方面。来自五个热水钻孔的新数据显示了大气异常如何在多年时间尺度上影响菲尔奇纳-罗恩冰架下的环流。对于更好地预测南极洲这一部分对未来海平面上升的影响,密水形成与遥远的遥相关之间的明显联系是重要的一步。
Floating ice shelves are the Achilles’ heel of the Antarctic Ice Sheet. They limit Antarctica’s contribution to global sea level rise, yet they can be rapidly melted from beneath by a warming ocean. At Filchner-Ronne Ice Shelf, a decline in sea ice formation may increase basal melt rates and accelerate marine ice sheet mass loss within this century. However, the understanding of this tipping-point behavior largely relies on numerical models. Our new multi-annual observations from five hot-water drilled boreholes through Filchner-Ronne Ice Shelf show that since 2015 there has been an intensification of the density-driven ice shelf cavity-wide circulation in response to reinforced wind-driven sea ice formation in the Ronne polynya. Enhanced southerly winds over Ronne Ice Shelf coincide with westward displacements of the Amundsen Sea Low position, connecting the cavity circulation with changes in large-scale atmospheric circulation patterns as a new aspect of the atmosphere-ocean-ice shelf system. New data from five hot-water drilled boreholes show how atmospheric anomalies affect the circulation beneath Filchner-Ronne Ice Shelf on multi-year time scales. The apparent link of the dense water formation to remote teleconnections is an important step for better predicting contributions to future sea level rise from this sector of Antarctica.
DOI: 10.1029/2019jc015847
发表时间: 2020-06-01
影响因子: 3.6
作者:
Hausmann, U.;Sallee, J. B.;Hattermann, T.
通讯作者: Hattermann, T.
DOI: 10.1002/2015gl067143
发表时间: 2016-01-16
影响因子: 5.2
作者:
Hosking, J. Scott;Orr, Andrew;Turner, John
通讯作者: Turner, John
DOI: 10.1029/2020gl089237
发表时间: 2020-11-28
影响因子: 5.2
作者:
Daae, K.;Hattermann, T.;Hellmer, H. H.
通讯作者: Hellmer, H. H.
DOI: 10.1007/s00382-010-0905-0
发表时间: 2011-04-01
期刊: CLIMATE DYNAMICS
影响因子: 4.6
作者:
Fogt, Ryan L.;Bromwich, David H.;Hines, Keith M.
通讯作者: Hines, Keith M.
DOI: 10.1038/ngeo1627
发表时间: 2012-12-01
期刊: NATURE GEOSCIENCE
影响因子: 18.3
作者:
Holland, Paul R.;Kwok, Ron
通讯作者: Kwok, Ron