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DOI | 10.1029/2019GB006200 |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery | |
Terhaar J.; Orr J.C.; Ethé C.; Regnier P.; Bopp L. | |
发表日期 | 2019 |
ISSN | 0886-6236 |
EISSN | 1944-9224 |
起始页码 | 1048 |
结束页码 | 1070 |
卷号 | 33期号:8 |
英文摘要 | The Arctic Ocean, more than any other ocean, is influenced by riverine input of carbon and nutrients. That riverine delivery is likely to change with climate change as runoff increases, permafrost thaws, and tree lines advance. But it is unknown to what extent these changes in riverine delivery will affect Arctic Ocean primary production, air-to-sea CO2 fluxes, and acidification. To test their sensitivity to changing riverine delivery, we made sensitivity tests using an ocean circulation model coupled to an ocean biogeochemical model. In separate idealized simulations, riverine inputs of dissolved inorganic carbon (CT), dissolved organic carbon (DOC), and nutrients were increased by 1%/year until doubling. Doubling riverine nutrient delivery increased primary production by 11% on average across the Arctic basin and by up to 34–35% locally. Doubling riverine DOC delivery resulted in 90% of that added carbon being lost to the atmosphere, partly because it was imposed that once delivered to the ocean, the riverine DOC is instantaneously remineralized to CT. That additional outgassing, when considered alone, reduced the net ingassing of natural CO2 into the Arctic Ocean by 25% while converting the Siberian shelf seas and the Beaufort Sea from net sinks to net sources of carbon to the atmosphere. The remaining 10% of DOC remained in the Arctic Ocean, but having been converted to CT, it enhanced acidification. Conversely, doubling riverine CT increased the Arctic Ocean's average surface pH by 0.02 because riverine total alkalinity delivery increased at the same rate as riverine CT delivery. ©2019. The Authors. |
英文关键词 | Arctic Ocean; biogeochemistry; carbon; nutrients; riverine delivery; sensitivity |
语种 | 英语 |
scopus关键词 | acidification; air-sea interaction; biogeochemistry; carbon cycle; climate change; dissolved inorganic carbon; dissolved organic carbon; nutrient dynamics; permafrost; primary production; runoff; sensitivity analysis; Arctic Ocean; Beaufort Sea |
来源期刊 | Global Biogeochemical Cycles
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/129718 |
作者单位 | Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Paris, France; Institut Pierre et Simon Laplace, Paris, France; Biogeochemistry and Earth System Modelling, Department of Geoscience, Environment and Society, Université Libre de Bruxelles, Brussels, Belgium; LMD/IPSL, Ecole Normale Supérieure / PSL Research University, CNRS, Ecole Polytechnique, Sorbonne Université, Paris, France |
推荐引用方式 GB/T 7714 | Terhaar J.,Orr J.C.,Ethé C.,et al. Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery[J],2019,33(8). |
APA | Terhaar J.,Orr J.C.,Ethé C.,Regnier P.,&Bopp L..(2019).Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery.Global Biogeochemical Cycles,33(8). |
MLA | Terhaar J.,et al."Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery".Global Biogeochemical Cycles 33.8(2019). |
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