Dissolved Organic Carbon in the North Atlantic Meridional Overturning Circulation.
Dissolved Organic Carbon in the North Atlantic Meridional Overturning Circulation.
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DOI：
10.1038/srep26931
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发表时间：
2016-05-31
影响因子：
4.6
通讯作者：
Pérez FF
中科院分区：
文献类型：
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作者：
Fontela M;García-Ibáñez MI;Hansell DA;Mercier H;Pérez FF
大西洋经向翻转环流（AMOC）在溶解有机碳（DOC）输出的定量作用进行了评估相结合的DOC测量观测到的水质量输送。在北大西洋副极地东部，AMOC的上、下肢输送高DOC沃茨。连接AMOC两个分支的深水形成导致非难降解DOC（197 Tg-C·yr−1）的高向下输出。随后在亚极地和亚热带纬度之间的AMOC的下肢中的再矿化消耗了整个大西洋输出的DOC的72%。DOC对北大西洋碳固存的贡献（62 Tg-C·yr−1）相当大，几乎占该地区大气CO2吸收量的三分之一。
The quantitative role of the Atlantic Meridional Overturning Circulation (AMOC) in dissolved organic carbon (DOC) export is evaluated by combining DOC measurements with observed water mass transports. In the eastern subpolar North Atlantic, both upper and lower limbs of the AMOC transport high-DOC waters. Deep water formation that connects the two limbs of the AMOC results in a high downward export of non-refractory DOC (197 Tg-C·yr−1). Subsequent remineralization in the lower limb of the AMOC, between subpolar and subtropical latitudes, consumes 72% of the DOC exported by the whole Atlantic Ocean. The contribution of DOC to the carbon sequestration in the North Atlantic Ocean (62 Tg-C·yr−1) is considerable and represents almost a third of the atmospheric CO2 uptake in the region.