Numerical experiments examining the response of onshore oceanic heat supply to yearly changes in the Amundsen Sea icescape (Antarctica)

Satellite images from Antarctica reveal important changes in the coastal icescape (fast-ice, icebergs and ice shelves) but these yearly changes and their impacts on the coastal circulation and ice shelf basal melt rates are not represented in the Earth System Models used to project future sea level rise. The impacts of these yearly icescape changes are thus investigated using a high-resolution regional ocean-ice shelves-sea ice coupled model of the Amundsen Sea (Antarctica). A set of nine semi-idealized experiments were designed to highlight the impacts of (a) the collapse of the Thwaites Glacier Tongue, (b) the disappearance of the Bear Ridge Iceberg Chain and tabular iceberg B22, and (c) presence/absence of a fast-ice cover between Thwaites and Pine Island ice shelves, in both cold and warm background hydrological conditions. The dataset features the results of the nine experiments and reveals changes in sea ice concentrations, coastal oceanic circulation and oceanic heat supply to the ice shelf cavities, ice shelf basal melt rates, hydrological conditions, and fluxes of heat/freshwater at the sea surface. These model results are archived in self-documented NetCDF files with the appropriate metadata for each variable. The dataset includes a 'readme file' providing an overview of the archive as well as additional information regarding the model results.

来自南极洲的卫星影像揭示了沿岸冰景（固定冰（fast-ice）、冰山（icebergs）与冰架（ice shelves））的显著变化，但当前用于预测未来海平面上升的地球系统模式（Earth System Models）未能体现这些年际变化及其对沿岸环流和冰架底部消融速率的影响。因此，本研究采用高分辨率的阿蒙森海（Amundsen Sea，南极洲）区域海-冰架-海冰耦合模式，针对此类年际冰景变化的影响展开探究。本研究设计了9组半理想化试验，用以明晰(a)思韦茨冰川舌（Thwaites Glacier Tongue）崩塌、(b)熊脊冰山链（Bear Ridge Iceberg Chain）与B22桌状冰山（tabular iceberg B22）消失，以及(c)思韦茨冰架与派恩岛冰架（Pine Island ice shelves）之间固定冰覆盖的存在与否，在冷、暖两种背景水文条件下所产生的影响。本数据集收录了这9组试验的结果，涵盖海冰浓度、沿岸海洋环流、冰架腔的海洋热供给、冰架底部消融速率、水文条件，以及海表热通量与淡水通量的变化。上述模式结果以附带各变量对应元数据的自文档化NetCDF文件完成存档。数据集附带一份readme文件，用于概述该存档内容，并提供有关模式结果的补充信息。