GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-16-0725.1
Large Reemergence of Anthropogenic Carbon into the Ocean's Surface Mixed Layer Sustained by the Ocean's Overturning Circulation
Toyama, Katsuya1,2; Rodgers, Keith B.2; Blanke, Bruno3; Iudicone, Daniele4; Ishii, Masao1; Aumont, Olivier5; Sarmiento, Jorge L.2
2017-11-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2017
卷号30期号:21
文章类型Article
语种英语
国家Japan; USA; France; Italy
英文摘要

We evaluate the output from a widely used ocean carbon cycle model to identify the subduction and obduction (reemergence) rates of anthropogenic carbon (Cant) for climatological conditions during the World Ocean Circulation Experiment (WOCE) era in 1995 using a new set of Lagrangian diagnostic tools. The principal scientific value of the Lagrangian diagnostics is in providing a new means to connect Cant reemergence pathways to the relatively rapid renewal time scales of mode waters through the overturning circulation. Our main finding is that for this model with 2.04 PgC yr(-1) of uptake of Cant via gas exchange, the subduction and obduction rates across the base of the mixed layer (MLbase) are 4.96 and 4.50 PgC yr(-1), respectively, which are twice as large as the gas exchange at the surface. Given that there is net accumulation of 0.17 PgC yr(-1) in the mixed layer itself, this implies the residual downward C-ant transport of 1.40 PgC yr(-1) across the MLbase is associated with diffusion. Importantly, the net patterns for subduction and obduction transports of Cant mirror the large-scale patterns for transport of water volume, thereby illustrating the processes controlling Cant uptake. Although the net transfer across the MLbase by compensating subduction and obduction is relatively smaller than the diffusion, the localized pattern of Cant subduction and obduction implies significant regional impacts. The median time scale for reemergence of obducting particles is short (<10 yr), indicating that reemergence should contribute to limiting future carbon uptake through its contribution to perturbing the Revelle factor for surface waters.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000414646000010
WOS关键词SUBTROPICAL MODE WATER ; EQUATORIAL PACIFIC ; DIOXIDE EXCHANGE ; NORTH-ATLANTIC ; CO2 UPTAKE ; SUBDUCTION ; VENTILATION ; VARIABILITY ; ATMOSPHERE ; DISCHARGE
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20220
专题气候变化
作者单位1.Japan Meteorol Agcy, Meteorol Res Inst, Oceanog & Geochem Res Dept, Tsukuba, Ibaraki, Japan;
2.Princeton Univ, Atmospher & Ocean Sci, Princeton, NJ 08544 USA;
3.IUEM, IFREMER, CNRS, UMR 6523,IRD,UBO,Lab Oceanog Phys & Spatiale, Plouzane, France;
4.Staz Zool Anton Dohrn, Dept Integrated Marine Ecol, Naples, Italy;
5.Univ Paris 06, UPMC, Sorbonne Univ, CNRS,IRD,MNHN,LOCEAN,IPSL, Paris, France
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Toyama, Katsuya,Rodgers, Keith B.,Blanke, Bruno,et al. Large Reemergence of Anthropogenic Carbon into the Ocean's Surface Mixed Layer Sustained by the Ocean's Overturning Circulation[J]. JOURNAL OF CLIMATE,2017,30(21).
APA Toyama, Katsuya.,Rodgers, Keith B..,Blanke, Bruno.,Iudicone, Daniele.,Ishii, Masao.,...&Sarmiento, Jorge L..(2017).Large Reemergence of Anthropogenic Carbon into the Ocean's Surface Mixed Layer Sustained by the Ocean's Overturning Circulation.JOURNAL OF CLIMATE,30(21).
MLA Toyama, Katsuya,et al."Large Reemergence of Anthropogenic Carbon into the Ocean's Surface Mixed Layer Sustained by the Ocean's Overturning Circulation".JOURNAL OF CLIMATE 30.21(2017).
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