DOI: 10.1002/2016GB005400
Scopus记录号: 2-s2.0-84979085683
论文题名: Quantifying the drivers of ocean-atmosphere CO2 fluxes
作者: Lauderdale J ; M ; , Dutkiewicz S ; , Williams R ; G ; , Follows M ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 7 起始页码: 983
结束页码: 999
语种: 英语
英文关键词: air-sea flux
; carbon dioxide
; regional drivers
Scopus关键词: air-ice interaction
; alkalinity
; biogeochemistry
; carbon dioxide
; climate modeling
; complexity
; concentration (composition)
; disequilibrium
; global climate
; mantle upwelling
; quantitative analysis
; regional climate
; sea surface salinity
; sea surface temperature
; steady-state equilibrium
; upwelling
英文摘要: A mechanistic framework for quantitatively mapping the regional drivers of air-sea CO2 fluxes at a global scale is developed. The framework evaluates the interplay between (1) surface heat and freshwater fluxes that influence the potential saturated carbon concentration, which depends on changes in sea surface temperature, salinity and alkalinity, (2) a residual, disequilibrium flux influenced by upwelling and entrainment of remineralized carbon- and nutrient-rich waters from the ocean interior, as well as rapid subduction of surface waters, (3) carbon uptake and export by biological activity as both soft tissue and carbonate, and (4) the effect on surface carbon concentrations due to freshwater precipitation or evaporation. In a steady state simulation of a coarse-resolution ocean circulation and biogeochemistry model, the sum of the individually determined components is close to the known total flux of the simulation. The leading order balance, identified in different dynamical regimes, is between the CO2 fluxes driven by surface heat fluxes and a combination of biologically driven carbon uptake and disequilibrium-driven carbon outgassing. The framework is still able to reconstruct simulated fluxes when evaluated using monthly averaged data and takes a form that can be applied consistently in models of different complexity and observations of the ocean. In this way, the framework may reveal differences in the balance of drivers acting across an ensemble of climate model simulations or be applied to an analysis and interpretation of the observed, real-world air-sea flux of CO2. ©2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77836
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Earth, Ocean and Ecological Sciences, School of Environmental Science, University of Liverpool, Liverpool, Merseyside, United Kingdom
Recommended Citation:
Lauderdale J,M,, Dutkiewicz S,et al. Quantifying the drivers of ocean-atmosphere CO2 fluxes[J]. Global Biogeochemical Cycles,2016-01-01,30(7)