Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula

Disintegration and Buttressing Effect of the Landfast Sea Ice in the Larsen B Embayment, Antarctic Peninsula
复制标题

南极半岛拉森B湾固定海冰的崩解与支撑效应

DOI:
10.1029/2023gl104066
复制
发表时间:
2023
影响因子:
5.2
通讯作者:
B. Minchew
B. Minchew
中科院分区:
地球科学1区
文献类型:
--
作者:
Yudong Sun;B. Riel;B. Minchew

文献摘要

参考文献

被引文献

相似文献

冰架坍塌后冰川的加速可能会显著加速冰块质量的丧失。研究陆上海冰的变形使研究其阻力(支撑)应力和驱动冰崩塌的机制成为可能。这里,我们对Sentinel-1A/B合成孔径雷达数据进行偏移跟踪,获得了2014-2022年南极半岛拉森B冰架覆盖的海湾中陆地冰的水平速度场和应变率场的时间序列。陆地冰在2022年解体,我们发现它是由几个大的裂隙沉淀的。搁浅的冰川在崩塌后没有瞬间加速,这意味着陆上冰层几乎没有支撑作用,这一结论也得到了冰川速度和陆上冰层面积之间几乎为零的相关性的支持。我们的观察表明,在冰架坍塌后,在亚十年的时间尺度上,支撑压力不太可能被陆地上的海冰恢复。
The speed‐up of glaciers following ice shelf collapse can accelerate ice mass loss dramatically. Investigating the deformation of landfast sea ice enables studying its resistive (buttressing) stresses and mechanisms driving ice collapse. Here, we apply offset tracking to Sentinel‐1A/B synthetic aperture radar data to obtain a 2014–2022 time‐series of horizontal velocity and strain rate fields of landfast ice filling the embayment formerly covered by the Larsen B Ice Shelf, Antarctic Peninsula until 2002. The landfast ice disintegrated in 2022, and we find that it was precipitated by a few large opening rifts. Grounded glaciers did not accelerate instantaneously after the collapse, which implies little buttressing effect from landfast ice, a conclusion also supported by the near‐zero correlation between glacier velocity and landfast ice area. Our observations suggest that buttressing stresses are unlikely to be recovered by landfast sea ice over sub‐decadal timescales following the collapse of an ice shelf.
DOI: 10.1038/s43017-022-00281-0
发表时间: 2022
影响因子: 42.1
作者:
Raphael, Marilyn N.;Handcock, Mark S.
通讯作者: Handcock, Mark S.
DOI: 10.1029/2019gl084397
发表时间: 2019-10
影响因子: 5.2
作者:
A. Robel;A. Banwell
通讯作者: A. Robel;A. Banwell
DOI: 10.5194/tc-15-5061-2021
发表时间: 2021-11
期刊: The Cryosphere
影响因子: --
作者:
A. Fraser;R. Massom;M. Handcock;P. Reid;K. Ohshima;M. Raphael;J. Cartwright;A. Klekociuk;Zhaohui Wang;R. Porter-Smith
通讯作者: A. Fraser;R. Massom;M. Handcock;P. Reid;K. Ohshima;M. Raphael;J. Cartwright;A. Klekociuk;Zhaohui Wang;R. Porter-Smith
利用遥感观测冰川中的行波:新的灵活时间序列方法及其在格陵兰岛 Sermeq Kujalleq(雅各布港伊斯布雷)的应用
DOI: 10.5194/tc-15-407-2021
发表时间: 2021
期刊: The Cryosphere
影响因子: --
作者:
Riel, Bryan;Minchew, Brent;Joughin, Ian
通讯作者: Joughin, Ian
DOI: 10.5194/tc-7-647-2013
发表时间: 2013-01-01
期刊: CRYOSPHERE
影响因子: 5.2
作者:
Gudmundsson, G. H.
通讯作者: Gudmundsson, G. H.