Reference : Holocene carbon cycle dynamics
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/108321
Holocene carbon cycle dynamics
English
Kleinen, Thomas [> > > >]
Brovkin, Victor [> > > >]
von Bloh, Werner [> > > >]
Archer, David [> > > >]
Munhoven, Guy mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) - Pétrologie, géochimie endogènes et pétrophysique >]
2010
Geophysical Research Letters
American Geophysical Union
37
Yes (verified by ORBi)
International
0094-8276
Washington
DC
[en] Holocene ; Carbon cycle ; Carbon dioxide
[en] We are investigating the late Holocene rise in CO2 by performing four experiments with the climate-carbon-cycle model CLIMBER2-LPJ. Apart from the deep sea sediments, important carbon cycle processes considered are carbon uptake or release by the vegetation, carbon uptake by peatlands, and CO2 release due to shallow water sedimentation of CaCO3. Ice core data of atmospheric CO2 between 8 ka BP and preindustrial climate can only be reproduced if CO2 outgassing due to shallow water sedimentation of CaCO3 is considered. In this case the model displays an increase of nearly 20 ppmv CO2 between 8 ka BP and present day. Model configurations that do not contain this forcing show a slight decrease in atmospheric CO2. We can therefore explain the late Holocene rise in CO2 by invoking natural forcing factors only, and anthropogenic forcing is not required to understand preindustrial CO2 dynamics.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Deutsche Forschungsgemeinschaft - DFG
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/108321
10.1029/2009GL041391

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