The Influence of Ocean Topography on the Upwelling of Carbon in the Southern Ocean
The Influence of Ocean Topography on the Upwelling of Carbon in the Southern Ocean
复制标题
海洋地形对南大洋碳上涌的影响
DOI：
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发表时间：
2021
影响因子：
5.2
通讯作者：
N. Lovenduski
中科院分区：
文献类型：
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作者：
R. Brady;M. Maltrud;P. Wolfram;H. Drake;N. Lovenduski
南大洋的物理循环决定了CO2的表面浓度和海气交换。然而，我们对将深层富碳沃茨带到地表的三维环流的理解有限。在这里，我们介绍和分析了一种新的高分辨率海洋模式模拟与积极的海洋地球化学和在线拉格朗日粒子跟踪。我们将注意力集中在具有高溶解无机碳（DIC）的颗粒子集上，这些颗粒起源于1，000 m以下，最终上升到近地表层（上部200 m）。我们发现，71%的DIC富集水在1,000米范围内集中在地形特征附近，而这些地形特征仅占南极绕极流的33%。一旦颗粒上升到近表面层，无论其来源如何，它们都表现出相对均匀的pCO 2水平和DIC去相关时间尺度。我们的研究结果表明，南大洋水深测量在将富碳沃茨输送到表面方面起着关键作用。
The physical circulation of the Southern Ocean sets the surface concentration and thus air‐sea exchange of CO2 . However, we have a limited understanding of the three‐dimensional circulation that brings deep carbon‐rich waters to the surface. Here, we introduce and analyze a novel high‐resolution ocean model simulation with active biogeochemistry and online Lagrangian particle tracking. We focus our attention on a subset of particles with high dissolved inorganic carbon (DIC) that originate below 1,000 m and eventually upwell into the near‐surface layer (upper 200 m). We find that 71% of the DIC‐enriched water upwelling across 1,000 m is concentrated near topographic features, which occupy just 33% of the Antarctic Circumpolar Current. Once particles upwell to the near‐surface layer, they exhibit relatively uniform pCO2 levels and DIC decorrelation timescales, regardless of their origin. Our results show that Southern Ocean bathymetry plays a key role in delivering carbon‐rich waters to the surface.