Antarctic Glacial Melt as a Driver of Recent Southern Ocean Climate Trends
Antarctic Glacial Melt as a Driver of Recent Southern Ocean Climate Trends
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南极冰川融化是最近南大洋气候趋势的驱动因素
DOI：
10.1029/2019gl086892
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
Craig D. Rye;J. Marshall;M. Kelley;G. Russell;L. Nazarenko;Y. Kostov;G. Schmidt;J. Hansen
中科院分区：
文献类型：
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作者：
Craig D. Rye;J. Marshall;M. Kelley;G. Russell;L. Nazarenko;Y. Kostov;G. Schmidt;J. Hansen
历史气候模拟并未捕捉到南大洋 (SO) 气候的最新趋势——地表变冷、清新和海冰扩张。在这里，我们证明，将南极融水的合理增加添加到耦合气候模型中可以更接近地匹配各种气候趋势。我们使用戈达德空间研究所地球系统模型的模拟集合来计算添加融水的“气候响应函数”（CRF）。这意味着 SO 的冷却和清新、海冰的扩张以及空间高度的增加，所有这些都与 1992 年以来的观测结果一致。CRF 框架允许人们比较南极融水作为 SO 气候趋势驱动因素相对于温室气体和地面风强迫的功效。这里提出的融水 CRF 强烈表明，交互式南极冰融化应纳入气候模型中。
Recent trends in Southern Ocean (SO) climate—of surface cooling, freshening, and sea ice expansion—are not captured in historical climate simulations. Here we demonstrate that the addition of a plausible increase in Antarctic meltwater to a coupled climate model can produce a closer match to a wide range of climate trends. We use an ensemble of simulations of the Goddard Institute for Space Studies Earth system model to compute “climate response functions” (CRFs) for the addition of meltwater. These imply a cooling and freshening of the SO, an expansion of sea ice, and an increase in steric height, all consistent with observations since 1992. The CRF framework allows one to compare the efficacy of Antarctic meltwater as a driver of SO climate trends, relative to greenhouse gas and surface wind forcing. The meltwater CRFs presented here strongly suggest that interactive Antarctic ice melt should be included in climate models.