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.
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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
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发表时间:
2021-05-20
影响因子:
16.6
通讯作者:
Kanzow T
中科院分区:
文献类型:
--
作者:
Hattermann T;Nicholls KW;Hellmer HH;Davis PED;Janout MA;Østerhus S;Schlosser E;Rohardt G;Kanzow T
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.
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影响因子:
3.6
作者:
Hausmann, U.;Sallee, J. B.;Hattermann, T.
通讯作者:
Hattermann, T.
影响因子:
5.2
作者:
Hosking, J. Scott;Orr, Andrew;Turner, John
通讯作者:
Turner, John
影响因子:
5.2
作者:
Daae, K.;Hattermann, T.;Hellmer, H. H.
通讯作者:
Hellmer, H. H.
影响因子:
4.6
作者:
Fogt, Ryan L.;Bromwich, David H.;Hines, Keith M.
通讯作者:
Hines, Keith M.
影响因子:
18.3
作者:
Holland, Paul R.;Kwok, Ron
通讯作者:
Kwok, Ron