DOI: 10.1029/2019GB006200
论文题名: Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery
作者: Terhaar J. ; Orr J.C. ; Ethé C. ; Regnier P. ; Bopp L.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 8 语种: 英语
英文关键词: 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
学科: Arctic Ocean
; biogeochemistry
; carbon
; nutrients
; riverine delivery
; sensitivity
中文摘要: 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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160113
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Terhaar J.,Orr J.C.,Ethé C.,et al. Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery[J]. Global Biogeochemical Cycles,2019-01-01,33(8)