Though it is clear that the North Atlantic is the site of the highest storage of anthropogenic carbon (C_ant) per area, it is uncertain whether the air‐sea C_ant fluxes contributing to North Atlantic C_ant storage occur in the subpolar gyre or upstream in the subtropical gyre. Using data and models, we show that air‐sea C_ant uptake capacity is advected into the subpolar gyre along the same subsurface pathway as nutrients. This pathway is known as the nutrient stream. On the A22 section between Woods Hole and Bermuda, nutrient stream waters are the oldest in the upper 2,000 m and contain low C_ant. These northward moving waters are sufficiently depleted in C_ant such that they could sustain a subpolar air‐sea C_ant flux of −0.19 Pg C_ant year⁻¹. The ocean hindcast model used here indicates that despite some subtropical re‐circulation, uptake capacity is transported into the subpolar gyre where it sustains subpolar air‐sea C_ant uptake. With this model, we show that high‐ and low‐end estimates of subpolar air‐sea C_ant flux are reconciled by accounting for a factor of two difference in their respective study areas. If half of the observed air‐sea C_ant uptake capacity transport at A22 is ventilated in the subpolar region, it can fully support high‐end estimates of the subpolar air‐sea C_ant sink (−0.09±0.01 Pg C_ant year⁻¹).

中文翻译：

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北大西洋人为碳汇的控制措施

虽然很明显，北大西洋是人为碳的最高存储的网站（Ç_{一个ñ牛逼}单位面积），它是不确定的海气是否Ç_{一个ň牛逼} 通量有助于北大西洋ç_{一个ň牛逼} 存储发生在亚极回旋中或在亚热带回旋中的上游。使用数据和模型，我们表明，海气ç_{一个ñ ŧ} 吸收能力沿着与养分相同的地下途径流入亚极回旋。该途径被称为营养流。在伍兹霍尔（Woods Hole）和百慕达（B​​ermuda）之间的A22区段，养分流水是最古老的水域，最高流域为2,000 m，而低水域的C _{a n t}。这些向北移动水域中充分消耗Ç_一个Ñ吨 ，使得它们可以维持一个极地海气Ç_一个Ñ吨 助熔剂-0.19 PG  Ç_一个Ñ吨 年^-1。这里使用的海洋后报模型表明，尽管有一些亚热带重新循环，吸收能力被输送到极地环流在那里维持亚极地海气ç_{一个ñ牛逼} 的摄取。在这种模式下，我们证明了高和副极地海气的低端估计Ç_{一个ň牛逼} 通量被占各自研究领域的两个差的因素协调。如果 在A22处观测到的空中C _{a n t}吸收能力传输的一半在亚极地区通风，它可以完全支持对亚极C _{a n t} 水槽的高端估计（−0.09±0.01 Pg  C_{一个ñ牛逼} 年^-1）。