Recent trends and drivers of regional sources and sinks of carbon dioxide

Abstract. The land and ocean absorb on average just over half of the anthropogenic emissions of carbon dioxide (CO2) every year. These CO2 "sinks" are modulated by climate change and variability. Here we use a suite of nine dynamic global vegetation models (DGVMs) and four ocean biogeochemical general circulation models (OBGCMs) to estimate trends driven by global and regional climate and atmospheric CO2 in land and oceanic CO2 exchanges with the atmosphere over the period 1990–2009, to attribute these trends to underlying processes in the models, and to quantify the uncertainty and level of inter-model agreement. The models were forced with reconstructed climate fields and observed global atmospheric CO2;…

• NS
  National Science Foundation

  Awards: AGS-1048827, 1048827, NSF AGS-1048827
• SR
  Sight Research UK

  Awards: NE/J010154/1, NE/J010057/1, NE/K002481/1
• RC
  Research Councils UK
• EC
  European Commission

  Awards: 264879, EU FP7, FP7 2007-2013, 2007-2013, 238366, 282672, 283080, 603542
• ET
  Eidgenössische Technische Hochschule Zürich
• NE
  Natural Environment Research Council

  Awards: NE/J010057/1, 603542, NE/K002481/1, NE/J010154/1
• BF
  Bjerknessenteret for klimaforskning, Universitetet i Bergen