DOI: 10.1029/2019GB006239
论文题名: The Spatiotemporal Dynamics of the Sources and Sinks of CO2 in the Global Coastal Ocean
作者: Roobaert A. ; Laruelle G.G. ; Landschützer P. ; Gruber N. ; Chou L. ; Regnier P.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 12 语种: 英语
英文关键词: carbon cycle
; carbon dioxide
; coastal zone
; global perspective
; ice cover
; latitude
; partial pressure
; sea ice
; sea surface
; seasonality
; source-sink dynamics
; spatiotemporal analysis
; wind velocity
; Arctic
学科: air-sea CO2 exchange
; coastal seas
; continental shelves
; ocean carbon cycle
; seasonality
中文摘要: In contrast to the open ocean, the sources and sinks for atmospheric carbon dioxide (CO2) in the coastal seas are poorly constrained and understood. Here we address this knowledge gap by analyzing the spatial and temporal variability of the coastal air-sea flux of CO2 (FCO2) using a recent high-resolution (0.25°) monthly climatology for coastal sea surface partial pressure in CO2 (pCO2). Coastal regions are characterized by CO2 sinks at temperate and high latitudes and by CO2 sources at low latitude and in the tropics, with annual mean CO2 flux densities comparable in magnitude and pattern to those of the adjacent open ocean with the exception of river-dominated systems. The seasonal variations in FCO2 are large, often exceeding 2 mol C m−2 year−1, a magnitude similar to the variations exhibited across latitudes. The majority of these seasonal variations stems from the air-sea pCO2 difference, although changes in wind speed and sea ice cover can also be significant regionally. Globally integrated, the coastal seas act currently as a CO2 sink of −0.20 ± 0.02 Pg C year−1, with a more intense uptake occurring in summer because of the disproportionate influence of high-latitude shelves in the Northern Hemisphere. Combined with estimates of the carbon sinks in the open ocean and the Arctic, this gives for the global ocean, averaged over the 1998 to 2015 period an annual net CO2 uptake of −1.7 ± 0.3 Pg C year−1. ©2019. 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/160076
Appears in Collections: 气候变化与战略
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作者单位: Department of Geosciences, Environment & Society, Université Libre de Bruxelles, Brussels, Belgium; Max Planck Institute for Meteorology, Hamburg, Germany; Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland
Recommended Citation:
Roobaert A.,Laruelle G.G.,Landschützer P.,et al. The Spatiotemporal Dynamics of the Sources and Sinks of CO2 in the Global Coastal Ocean[J]. Global Biogeochemical Cycles,2019-01-01,33(12)