DOI: 10.1002/2014GB004853
Scopus记录号: 2-s2.0-84925467303
论文题名: Recent variability of the global ocean carbon sink
作者: Landschützer P ; , Gruber N ; , Bakker D ; C ; E ; , Schuster U
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 9 起始页码: 927
结束页码: 949
语种: 英语
英文关键词: air-sea exchange of CO2
; neural network
; observations
; ocean carbon cycle
; sea surface pCO2
Scopus关键词: air-sea interaction
; annual variation
; carbon dioxide
; carbon emission
; carbon sink
; estimation method
; global ocean
; marine ecosystem
; partial pressure
; seasonal variation
英文摘要: We present a new observation-based estimate of the global oceanic carbon dioxide (CO2 ) sink and its temporal variation on a monthly basis from 1998 through 2011 and at a spatial resolution of 1×1. This sink estimate rests upon a neural network-based mapping of global surface ocean observations of the partial pressure of CO2 (pCO2 ) from the Surface Ocean CO2 Atlas database. The resulting pCO2 has small biases when evaluated against independent observations in the different ocean basins, but larger randomly distributed differences exist particularly in high latitudes. The seasonal climatology of our neural network-based product agrees overall well with the Takahashi et al. (2009) climatology, although our product produces a stronger seasonal cycle at high latitudes. From our global pCO2 product, we compute a mean net global ocean (excluding the Arctic Ocean and coastal regions) CO2 uptake flux of -1.42 ± 0.53 Pg C yr-1, which is in good agreement with ocean inversion-based estimates. Our data indicate a moderate level of interannual variability in the ocean carbon sink (±0.12 Pg C yr-1, 1σ) from 1998 through 2011, mostly originating from the equatorial Pacific Ocean, and associated with the El Niño-Southern Oscillation. Accounting for steady state riverine and Arctic Ocean carbon fluxes our estimate further implies a mean anthropogenic CO2 uptake of -1.99 ± 0.59 Pg C yr-1 over the analysis period. From this estimate plus the most recent estimates for fossil fuel emissions and atmospheric CO2 accumulation, we infer a mean global land sink of -2.82 ± 0.85 Pg C yr-1 over the 1998 through 2011 period with strong interannual variation. ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77455
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland; Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; College of Life and Environmental Sciences, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom
Recommended Citation:
Landschützer P,, Gruber N,, Bakker D,et al. Recent variability of the global ocean carbon sink[J]. Global Biogeochemical Cycles,2014-01-01,28(9)