Dissolved Organic Carbon in the North Atlantic Meridional Overturning Circulation

被引：35
|
作者：
Fontela, Marcos [1 ]
Garcia-Ibanez, Maribel I. [1 ]
Hansell, Dennis A. [2 ]
Mercier, Herle [3 ]
Perez, Fiz F. [1 ]
机构：
[1] IIM CSIC, Inst Invest Marinas, Vigo 36208, Spain
[2] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, RSMAS OCE, 4600 Rickenbacker Causeway, Miami, FL 33149 USA
[3] IFREMER, Ctr Brest, Lab Phys Oceans, CNRS,UMR CNRS Ifremer IRD UBO 6523, Plouzane, France
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
美国国家科学基金会; 英国自然环境研究理事会;
关键词：
WATER MASSES; OCEAN; TRANSPORT; MATTER; CO2; NITROGEN; EXPORT;
D O I：
10.1038/srep26931
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 center dot 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 center dot yr(-1)) is considerable and represents almost a third of the atmospheric CO2 uptake in the region.
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页数：9
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