Mid‐Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream, West Antarctica
Mid‐Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream, West Antarctica
复制标题
南极洲西部威兰斯冰流的全新世中期接地线后撤和重新推进
DOI：
--
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
B. Rosenheim
中科院分区：
文献类型：
--
作者：
R. Venturelli;M. Siegfried;K. Roush;W. Li;J. Burnett;R. Zook;H. Fricker;J. Priscu;A. Leventer;B. Rosenheim
通过地质历史了解冰盖演化有助于约束预测未来冰盖动力学的冰盖模型。现有的南极罗斯海接地线退缩的地质记录仅限于无冰和陆地档案，这些档案反映了更广泛冰盖时期的动态。因此，我们对末次盛冰期以来接地线后退的看法仍然不完整。罗斯冰架和接地冰下的沉积物提供了对接地线最南端退缩范围的补充见解，从而对冰川消融期间的冰动力学产生了更完整的看法。在这里，我们用热化学方法分离了Whillans冰流接地线附近沉积物中最年轻的有机碳，以估计其年龄，为该地区的接地线后退提供了直接证据，早在全新世中期（7.2 kyr B.P.）。我们的研究证明了精确年代、接地线近端沉积物沉积物在重建过去海洋和冰下环境之间相互作用方面的实用性。
Understanding ice sheet evolution through the geologic past can help constrain ice sheet models that predict future ice dynamics. Existing geological records of grounding line retreat in the Ross Sea, Antarctica, have been confined to ice‐free and terrestrial archives, which reflect dynamics from periods of more extensive ice cover. Therefore, our perspective of grounding line retreat since the Last Glacial Maximum remains incomplete. Sediments beneath Ross Ice Shelf and grounded ice offer complementary insight into the southernmost extent of grounding line retreat, yielding a more complete view of ice dynamics during deglaciation. Here we thermochemically separate the youngest organic carbon to estimate ages from sediments extracted near the Whillans Ice Stream grounding line to provide direct evidence for grounding line retreat in that region as recent as the mid‐Holocene (7.2 kyr B.P.). Our study demonstrates the utility of accurately dated, grounding‐line‐proximal sediment deposits for reconstructing past interactions between marine and subglacial environments.
登录
查看更多内容
影响因子：
3.5
作者：
Wessel, P.;Luis, J. F.;Tian, D.
通讯作者：
Tian, D.
影响因子：
8.3
作者：
Bao, Rui;McNichol, Ann P.;Eglinton, Timothy, I
通讯作者：
Eglinton, Timothy, I
影响因子：
12.1
作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse
通讯作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse
影响因子：
56.9
作者：
Hemingway, Jordon D.;Hilton, Robert G.;Galy, Valier V.
通讯作者：
Galy, Valier V.
影响因子：
64.8
作者：
Golledge, N. R.;Kowalewski, D. E.;Gasson, E. G. W.
通讯作者：
Gasson, E. G. W.