Impact of terrestrial biosphere carbon exchanges on the anomalous CO2 increase in 2002–2003 Export

@article{citeulike:1297617, abstract = {Understanding the carbon dynamics of the terrestrial biosphere during climate fluctuations is a prerequisite for any reliable modeling of the climate-carbon cycle feedback. We drive a terrestrial vegetation model with observed climate data to show that most of the fluctuations in atmospheric CO2 are consistent with the modeled shift in the balance between carbon uptake by terrestrial plants and carbon loss through soil and plant respiration. Simulated anomalies of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) during the last two El Ni\~{n}o events also agree well with satellite observations. Our model results suggest that changes in net primary productivity (NPP) are mainly responsible for the observed anomalies in the atmospheric CO2 growth rate. Changes in heterotrophic respiration (Rh) mostly happen in the same direction, but with smaller amplitude. We attribute the unusual acceleration of the atmospheric CO2 growth rate during 2002–2003 to a coincidence of moderate El Ni\~{n}o conditions in the tropics with a strong NPP decrease at northern mid latitudes, only partially compensated by decreased Rh. }, author = {Knorr, W. and Gobron, N. and Scholze, M. and Kaminski, T. and Schnur, R. and Pinty, B.}, citeulike-article-id = {1297617}, citeulike-linkout-0 = {http://www.agu.org/pubs/crossref/2007/2006GL029019.shtml}, citeulike-linkout-1 = {http://dx.doi.org/10.1029/2006GL029019}, day = {5}, doi = {10.1029/2006GL029019}, issn = {0094-8276}, journal = {Geophysical Research Letters}, keywords = {41061161, co2, contamination, impact, increase}, month = {May}, number = {9}, pages = {L09703+}, posted-at = {2007-05-16 21:32:09}, priority = {3}, title = {Impact of terrestrial biosphere carbon exchanges on the anomalous CO2 increase in 2002–2003}, url = {http://dx.doi.org/10.1029/2006GL029019}, volume = {34}, year = {2007} }

TY - JOUR ID - citeulike:1297617 L3 - citeulike-article-id:1297617 N2 - Understanding the carbon dynamics of the terrestrial biosphere during climate fluctuations is a prerequisite for any reliable modeling of the climate-carbon cycle feedback. We drive a terrestrial vegetation model with observed climate data to show that most of the fluctuations in atmospheric CO2 are consistent with the modeled shift in the balance between carbon uptake by terrestrial plants and carbon loss through soil and plant respiration. Simulated anomalies of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) during the last two El Niño events also agree well with satellite observations. Our model results suggest that changes in net primary productivity (NPP) are mainly responsible for the observed anomalies in the atmospheric CO2 growth rate. Changes in heterotrophic respiration (Rh) mostly happen in the same direction, but with smaller amplitude. We attribute the unusual acceleration of the atmospheric CO2 growth rate during 2002–2003 to a coincidence of moderate El Niño conditions in the tropics with a strong NPP decrease at northern mid latitudes, only partially compensated by decreased Rh. IS - 9 JF - Geophysical Research Letters SN - 0094-8276 TI - Impact of terrestrial biosphere carbon exchanges on the anomalous CO2 increase in 2002–2003 VL - 34 SP - L09703 KW - 41061161 KW - co2 KW - contamination KW - impact KW - increase AU - Knorr, W AU - Gobron, N AU - Scholze, M AU - Kaminski, T AU - Schnur, R AU - Pinty, B PY - 2007/05/05/ UR - http://dx.doi.org/10.1029/2006GL029019 ER -