Annual mass budget of Antarctic ice shelves from 1997 to 2021.
Annual mass budget of Antarctic ice shelves from 1997 to 2021.
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DOI：
10.1126/sciadv.adi0186
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发表时间：
2023-10
期刊：
影响因子：
13.6
通讯作者：
B. Davison;A. Hogg;N. Gourmelen;Livia Jakob;J. Wuite;T. Nagler;C. Greene;Julia R. Andreasen;Marcus E. Engdahl
中科院分区：
文献类型：
--
作者：
B. Davison;A. Hogg;N. Gourmelen;Livia Jakob;J. Wuite;T. Nagler;C. Greene;Julia R. Andreasen;Marcus E. Engdahl
南极冰架减缓了南极冰盖对全球海平面上升的影响;然而，冰架的健康仍然受到很大的限制。在这里，我们提出了从1997年到2021年所有南极冰架的年度质量预算。在162个冰架中，71个失去了质量，29个增加了质量，62个没有明显改变质量。在质量损失的货架中，68个具有统计学显著的负质量趋势，48个损失超过其初始质量的30%，并且基底熔化是大多数质量损失的主要贡献者（68%）。在许多冰架，由于基底融化或冰山崩解的质量损失显着正相关接地线放电异常，然而，这种关系的强度和形式的冰架之间的变化很大。我们的研究结果说明了分区高分辨率冰架质量平衡观测到的组件量化的贡献者冰架质量变化和接地冰的响应的效用。
Antarctic ice shelves moderate the contribution of the Antarctic Ice Sheet to global sea level rise; however, ice shelf health remains poorly constrained. Here, we present the annual mass budget of all Antarctic ice shelves from 1997 to 2021. Out of 162 ice shelves, 71 lost mass, 29 gained mass, and 62 did not change mass significantly. Of the shelves that lost mass, 68 had statistically significant negative mass trends, 48 lost more than 30% of their initial mass, and basal melting was the dominant contributor to that mass loss at a majority (68%). At many ice shelves, mass losses due to basal melting or iceberg calving were significantly positively correlated with grounding line discharge anomalies; however, the strength and form of this relationship varied substantially between ice shelves. Our results illustrate the utility of partitioning high-resolution ice shelf mass balance observations into its components to quantify the contributors to ice shelf mass change and the response of grounded ice.