DOI: 10.1038/ngeo1680
论文题名: Atlantic Ocean CO2 uptake reduced by weakening of the meridional overturning circulation
作者: Pérez F.F. ; Mercier H. ; Vázquez-Rodríguez M. ; Lherminier P. ; Velo A. ; Pardo P.C. ; Rosón G. ; Ríos A.F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 2 起始页码: 146
结束页码: 152
语种: 英语
Scopus关键词: air-sea interaction
; anthropogenic source
; carbon dioxide
; carbon sequestration
; gyre
; heat transfer
; meridional circulation
; overturn
; warming
; water flow
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Uptake of atmospheric carbon dioxide in the subpolar North Atlantic Ocean declined rapidly between 1990 and 2006. This reduction in carbon dioxide uptake was related to warming at the sea surface, which - according to model simulations - coincided with a reduction in the Atlantic meridional overturning circulation. The extent to which the slowdown of this circulation system - which transports warm surface waters to the northern high latitudes, and cool deep waters south - contributed to the reduction in carbon uptake has remained uncertain. Here, we use data on the oceanic transport of volume, heat and carbon dioxide to track carbon dioxide uptake in the subtropical and subpolar regions of the North Atlantic Ocean over the past two decades. We separate anthropogenic carbon from natural carbon by assuming that the latter corresponds to a pre-industrial atmosphere, whereas the remaining is anthropogenic. We find that the uptake of anthropogenic carbon dioxide - released by human activities - occurred almost exclusively in the subtropical gyre. In contrast, natural carbon dioxide uptake - which results from natural Earth system processes - dominated in the subpolar gyre. We attribute the weakening of contemporary carbon dioxide uptake in the subpolar North Atlantic to a reduction in the natural component. We show that the slowdown of the meridional overturning circulation was largely responsible for the reduction in carbon uptake, through a reduction of oceanic heat loss to the atmosphere, and for the concomitant decline in anthropogenic CO2 storage in subpolar waters. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106859
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Instituto de Investigaciones Marinas, IIM-CSIC, 36208 Vigo, Spain; CNRS, Laboratoire de Physique des Océans, UMR6523, 29280 Plouzané, France; Ifremer, Laboratoire de Physique des Océans, UMR6523, 29280 Plouzané, France; Faculty of Marine Sciences, University of Vigo, Campus Lagoas-Marcosende, 36200 Vigo, Spain
Recommended Citation:
Pérez F.F.,Mercier H.,Vázquez-Rodríguez M.,et al. Atlantic Ocean CO2 uptake reduced by weakening of the meridional overturning circulation[J]. Nature Geoscience,2013-01-01,6(2)