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Recent changes in the global and regional carbon cycle: analysis of first-order diagnostics

Rayner, P. J.; Stavert, A.; Scholze, Marko LU ; Ahlström, Anders LU ; Allison, C. E. and Law, R. M. (2015) In Biogeosciences 12(3). p.835-844
Abstract
We analyse global and regional changes in CO2 fluxes using two simple models, an airborne fraction of anthropogenic emissions and a linear relationship with CO2 concentrations. We show that both models are able to fit the non-anthropogenic (hereafter natural) flux over the length of the atmospheric concentration record. Analysis of the linear model (including its uncertainties) suggests no significant decrease in the response of the natural carbon cycle. Recent data points rather to an increase. We apply the same linear diagnostic to fluxes from atmospheric inversions. Flux responses show clear regional and seasonal patterns driven by terrestrial uptake in the northern summer. Ocean fluxes show little or no linear response. Terrestrial... (More)
We analyse global and regional changes in CO2 fluxes using two simple models, an airborne fraction of anthropogenic emissions and a linear relationship with CO2 concentrations. We show that both models are able to fit the non-anthropogenic (hereafter natural) flux over the length of the atmospheric concentration record. Analysis of the linear model (including its uncertainties) suggests no significant decrease in the response of the natural carbon cycle. Recent data points rather to an increase. We apply the same linear diagnostic to fluxes from atmospheric inversions. Flux responses show clear regional and seasonal patterns driven by terrestrial uptake in the northern summer. Ocean fluxes show little or no linear response. Terrestrial models show clear responses, agreeing globally with the inversion responses, however the spatial structure is quite different, with dominant responses in the tropics rather than the northern extratropics. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeosciences
volume
12
issue
3
pages
835 - 844
publisher
Copernicus Publications
external identifiers
  • wos:000349793100014
  • scopus:84922933930
ISSN
1726-4189
DOI
10.5194/bg-12-835-2015
language
English
LU publication?
yes
id
c5a3e9bc-2095-48c7-91bd-83ec1bd23cad (old id 5274872)
alternative location
http://www.biogeosciences.net/12/835/2015/
date added to LUP
2015-04-23 16:15:32
date last changed
2017-01-01 03:40:28
@article{c5a3e9bc-2095-48c7-91bd-83ec1bd23cad,
  abstract     = {We analyse global and regional changes in CO2 fluxes using two simple models, an airborne fraction of anthropogenic emissions and a linear relationship with CO2 concentrations. We show that both models are able to fit the non-anthropogenic (hereafter natural) flux over the length of the atmospheric concentration record. Analysis of the linear model (including its uncertainties) suggests no significant decrease in the response of the natural carbon cycle. Recent data points rather to an increase. We apply the same linear diagnostic to fluxes from atmospheric inversions. Flux responses show clear regional and seasonal patterns driven by terrestrial uptake in the northern summer. Ocean fluxes show little or no linear response. Terrestrial models show clear responses, agreeing globally with the inversion responses, however the spatial structure is quite different, with dominant responses in the tropics rather than the northern extratropics.},
  author       = {Rayner, P. J. and Stavert, A. and Scholze, Marko and Ahlström, Anders and Allison, C. E. and Law, R. M.},
  issn         = {1726-4189},
  language     = {eng},
  number       = {3},
  pages        = {835--844},
  publisher    = {Copernicus Publications},
  series       = {Biogeosciences},
  title        = {Recent changes in the global and regional carbon cycle: analysis of first-order diagnostics},
  url          = {http://dx.doi.org/10.5194/bg-12-835-2015},
  volume       = {12},
  year         = {2015},
}