Meridional Ocean Carbon Transport
Meridional Ocean Carbon Transport
复制标题
经向海洋碳传输
DOI：
10.1029/2019gb006336
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发表时间：
2020
影响因子：
5.2
通讯作者：
Aldama-Campino A
中科院分区：
文献类型：
--
作者：
Aldama-Campino A
海洋吸收和储存二氧化碳的能力是理解过去和未来气候变化的一个关键因素。然而，对从表面到内部的途径以及海洋环流如何影响二氧化碳吸收的定性和定量理解是有限的。因此，海洋环流的变化如何影响碳的吸收和储存，从而影响未来的气候，仍然是不明确的。在这里，我们量化了海洋环流和各种水团在经向碳再分配中的作用。我们通过计算溶解无机碳（DIC）和纬度坐标定义的流函数，使用耦合生物地球化学-物理模型的输出来实现这一目标。通过进一步将DIC分解为来自溶解度泵和残留物（包括生物泵、空气-海洋不平衡和人为CO2）的组分，我们能够区分碳如何进入特定水体的主要途径。利用这个新工具，我们发现最大的经向碳输送发生在海洋上层副热带环流的极向赤道输送中。我们能够证明这种极向赤道DIC输送和大西洋经向翻转环流（AMOC）相关的DIC输送主要是由溶解度泵驱动的。而与深层环流相关的DIC输运，包括南极底水和太平洋深水，主要由生物泵驱动。由于这两个泵以及海洋环流被广泛认为会受到人为变化的影响，这些发现对海洋作为气候缓冲碳库的未来作用具有重要意义。
The ocean's ability to take up and store CO2is a key factor for understanding past and future climate variability. However, qualitative and quantitative understanding of surface‐to‐interior pathways, and how the ocean circulation affects the CO2uptake, is limited. Consequently, how changes in ocean circulation may influence carbon uptake and storage and therefore the future climate remains ambiguous. Here we quantify the roles played by ocean circulation and various water masses in the meridional redistribution of carbon. We do so by calculating streamfunctions defined in dissolved inorganic carbon (DIC) and latitude coordinates, using output from a coupled biogeochemical‐physical model. By further separating DIC into components originating from the solubility pump and a residual including the biological pump, air‐sea disequilibrium, and anthropogenic CO2, we are able to distinguish the dominant pathways of how carbon enters particular water masses. With this new tool, we show that the largest meridional carbon transport occurs in a pole‐to‐equator transport in the subtropical gyres in the upper ocean. We are able to show that this pole‐to‐equator DIC transport and the Atlantic meridional overturning circulation (AMOC)‐related DIC transport are mainly driven by the solubility pump. By contrast, the DIC transport associated with deep circulation, including that in Antarctic bottom water and Pacific deep water, is mostly driven by the biological pump. As these two pumps, as well as ocean circulation, are widely expected to be impacted by anthropogenic changes, these findings have implications for the future role of the ocean as a climate‐buffering carbon reservoir.
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大西洋北纬 25 度洋流的二氧化碳输送
影响因子：
56.9
作者：
P. Brewer;C. Goyet;D. Dyrssen
通讯作者：
D. Dyrssen
影响因子：
3.5
作者：
S. Groeskamp;J. Zika;T. McDougall;B. Sloyan;F. Laliberté
通讯作者：
S. Groeskamp;J. Zika;T. McDougall;B. Sloyan;F. Laliberté
影响因子：
56.9
作者：
R. Law;R. Matear;R. Francey
通讯作者：
R. Law;R. Matear;R. Francey
影响因子：
5.1
作者：
Jones, C. D.;Hughes, J. K.;Zerroukat, M.
通讯作者：
Zerroukat, M.
DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
M. Couldrey
通讯作者：
M. Couldrey