DOI: 10.1002/2014GB004832
Scopus记录号: 2-s2.0-84916880827
论文题名: Regionalized global budget of the CO2 exchange at the air-water interface in continental shelf seas
作者: Laruelle G ; G ; , Lauerwald R ; , Pfeil B ; , Regnier P
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 11 起始页码: 1199
结束页码: 1214
语种: 英语
英文关键词: Carbon cycle
; Co2
; Coastal ocean
Scopus关键词: air-sea interaction
; biogeochemistry
; carbon budget
; carbon dioxide
; carbon flux
; continental shelf
; sea ice
; shelf sea
; Arctic Ocean
英文摘要: Over the past decade, estimates of the atmospheric CO2 uptake by continental shelf seas were constrained within the 0.18-0.45 Pg C yr-1 range. However, most of those estimates are based on extrapolations from limited data sets of local flux measurements (n < 100). Here we propose to derive the CO2 air-sea exchange of the shelf seas by extracting 3 · 106 direct surface ocean CO2 measurements from the global database SOCAT (Surface Ocean CO2 Atlas), atmospheric CO2 values from GlobalVIEW and calculating gas transfer rates using readily available global temperature, salinity, and wind speed fields. We then aggregate our results using a global segmentation of the shelf in 45 units and 152 subunits to establish a consistent regionalized CO2 exchange budget at the global scale.Within each unit, the data density determines the spatial and temporal resolutions at which the air-sea CO2 fluxes are calculated and range from a 0.5° resolution in the best surveyed regions to a whole unit resolution in areas where data coverage is limited. Our approach also accounts, for the first time, for the partial sea ice cover of polar shelves. Our new regionalized global CO2 sink estimate of 0.19 ± 0.05 Pg C yr-1 falls in the low end of previous estimates. Reported to an ice-free surface area of 22 · 106 km2, this value yields a flux density of 0.7 mol C m-2 yr-1, ∼40% more intense than that of the open ocean. Our results also highlight the significant contribution of Arctic shelves to this global CO2 uptake (0.07 Pg C yr-1). ©2014. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77522
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Sciences, Université Libre de Bruxelles, Brussels, Belgium; Department of Earth Sciences-Geochemistry, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands; Institut Pierre-Simon Laplace, CNRS-FR636, Guyancourt, France; Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway
Recommended Citation:
Laruelle G,G,, Lauerwald R,et al. Regionalized global budget of the CO2 exchange at the air-water interface in continental shelf seas[J]. Global Biogeochemical Cycles,2014-01-01,28(11)