A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide

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Author(s) Jacobson, Andrew R., Fletcher, Sara E. Mikaloff, Gruber, Nicolas, Sarmiento, Jorge L., Gloor, Manuel
Publication Type Journal Items, Publication Status: Published
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Title A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide
Subtitle 1. Methods and global-scale fluxes
Author(s) Jacobson, Andrew R.
Fletcher, Sara E. Mikaloff
Gruber, Nicolas
Sarmiento, Jorge L.
Gloor, Manuel
Description 13 p.
Journal or Series Title Global biogeochemical cycles : an international journal of global change
Volume Number 21
Issue Number 1
Start Page GB1019
ISSN 0886-6236
1944-9224
Publisher American Geophysical Union
Publication Place Washington, D.C
Publication Date 2007
Keyword(s) Carbon
inversion
Abstract We have constructed an inverse estimate of surface fluxes of carbon dioxide using both atmospheric and oceanic observational constraints. This global estimate is spatially resolved into 11 land regions and 11 ocean regions, and is calculated as a temporal mean for the period 1992-1996. The method interprets in situ observations of carbon dioxide concentration in the ocean and atmosphere with transport estimates from global circulation models. Uncertainty in the modeled circulation is explicitly considered in this inversion by using a suite of 16 atmospheric and 10 oceanic transport simulations. The inversion analysis, coupled with estimates of river carbon delivery, indicates that the open ocean had a net carbon uptake from the atmosphere during the period 1992-96 of 1.7 PgC yr(-1), consisting of an uptake of 2.1 PgC yr(-1) of anthropogenic carbon and a natural outgassing of about 0.5 PgC yr(-1) of carbon fixed on land and transported through rivers to the open ocean. The formal uncertainty on this oceanic uptake, despite a comprehensive effort to quantify sources of error due to modeling biases, uncertain riverine carbon load, and biogeochemical assumptions, is driven down to 0.2 PgC yr(-1) by the large number and relatively even spatial distribution of oceanic observations used. Other sources of error, for which quantifiable estimates are not currently available, such as unresolved transport and large region inversion bias, may increase this uncertainty.
DOI 10.1029/2005GB002556
Additional Notes Received May 27 2005, Revised November 4 2006, Accepted November 20 2006
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03731
03267
Organisational Unit(s)
NEBIS System Number 000041178
Source Database ID PP-38835
WOS-000245016700001
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@article{Jcbsn2007,
  author = "Jacobson, Andrew R. and Fletcher, Sara E. Mikaloff and Gruber, Nicolas and Sarmiento, Jorge L. and Gloor, Manuel",
  title = "{A} joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 1. {M}ethods and global-scale fluxes",
  journal = "Global biogeochemical cycles : an international journal of global change",
  year = 2007,
  volume = "21",
  number = "1",
  pages = "GB1019--",
}


E-Citations record created: Thu, 01 Apr 2010, 21:27:03 CET