Ross Gyre variability modulates oceanic heat supply toward the West Antarctic continental shelf

Ross Gyre variability modulates oceanic heat supply toward the West Antarctic continental shelf
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罗斯环流变率调节向南极西部大陆架的海洋热量供应

DOI:
10.1038/s43247-024-01207-y
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发表时间:
2024
影响因子:
7.9
通讯作者:
Prend C
Prend C
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Prend C

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南极西部冰盖质量损失是海平面预测不确定性的主要来源。这种融化的主要驱动力是来自南极绕极流近海的绕极深水的海洋热量。然而,在评估融化变化时,公海过程受到的关注远远少于那些控制跨陆架交换的过程。在这里,我们在海洋模型中使用拉格朗日粒子释放实验来研究环极深水穿过南大洋太平洋部分向大陆架移动的路径。我们表明,罗斯环流的扩张与风和海冰的变化有关,增加了沿环流东缘向极地的热传输以及向阿蒙森海传输的相对比例。因此,罗斯环流变率影响了向南极西部大陆坡供应的海洋热量。了解基底融化的远程控制对于预测冰盖对人为强迫的反应是必要的。
West Antarctic Ice Sheet mass loss is a major source of uncertainty in sea level projections. The primary driver of this melting is oceanic heat from Circumpolar Deep Water originating offshore in the Antarctic Circumpolar Current. Yet, in assessing melt variability, open ocean processes have received considerably less attention than those governing cross-shelf exchange. Here, we use Lagrangian particle release experiments in an ocean model to investigate the pathways by which Circumpolar Deep Water moves toward the continental shelf across the Pacific sector of the Southern Ocean. We show that Ross Gyre expansion, linked to wind and sea ice variability, increases poleward heat transport along the gyre’s eastern limb and the relative fraction of transport toward the Amundsen Sea. Ross Gyre variability, therefore, influences oceanic heat supply toward the West Antarctic continental slope. Understanding remote controls on basal melt is necessary to predict the ice sheet response to anthropogenic forcing.
南大洋超级环流作为物理信息机器学习识别的统一动力框架
DOI: --
发表时间: 2023
期刊: Communications Earth & Environment
影响因子: --
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通讯作者: Redouane Lguensat
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期刊: Nature geoscience
影响因子: 18.3
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DOI: 10.1038/s41598-019-53190-6
发表时间: 2019-11-22
期刊: SCIENTIFIC REPORTS
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Nakayama, Yoshihiro;Manucharyan, Georgy;Menemenlis, Dimitris
通讯作者: Menemenlis, Dimitris
DOI: 10.1038/s41561-018-0082-z
发表时间: 2018-04-01
期刊: NATURE GEOSCIENCE
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作者:
Konrad, Hannes;Shepherd, Andrew;Slater, Thomas
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