HR: 16:45h
AN: B24A-02 INVITED     [Abstracts]
TI: Estimating European carbon balance and its uncertainties
AU: * Churkina, G
EM: churkina@umich.edu
AF: School of Natural Resources and Environment, Dana Building 440 Church Street, Ann Arbor, MI 48109-1041, United States
AU: * Churkina, G
EM: churkina@umich.edu
AF: Max-Planck Institute for Biogeochemistry, Hans-Knoell str. 10, Jena, 07745, Germany
AU: Vetter, M
EM: mvetter@bgc-jena.mpg.de
AF: Max-Planck Institute for Biogeochemistry, Hans-Knoell str. 10, Jena, 07745, Germany
AU: Jung, M
EM: mjung@bgc-jena.mpg.de
AF: Max-Planck Institute for Biogeochemistry, Hans-Knoell str. 10, Jena, 07745, Germany
AU: Tomelleri, E
EM: tomelleri@cealp.it
AF: Max-Planck Institute for Biogeochemistry, Hans-Knoell str. 10, Jena, 07745, Germany
AU: Tomelleri, E
EM: tomelleri@cealp.it
AF: Center for Alpine Ecology, Viote del Monte Bondone, Trento, 38040, Italy
AU: Trusilova, K
EM: ktrusil@bgc-jena.mpg.de
AF: Max-Planck Institute for Biogeochemistry, Hans-Knoell str. 10, Jena, 07745, Germany
AB: A globally significant carbon sink in 1980's-1990's in northern extratropical regions was inferred from variations in atmospheric CO2 concentrations. Although this sink was attributed mostly to forest ecosystems, the magnitude and cause of this sink remain uncertain. We aim at understanding the role of European continent in this carbon sink and associated uncertainties. Our analysis is based on simulations of European net carbon flux, gross primary productivity, and ecosystem respiration with BIOME-BGC model and with a few other vegetation models. All model simulations were performed with the same soil texture, digital elevation map, fractional vegetation classification, climate, and atmospheric CO2 concentrations. We discuss uncertainties in the estimates of gross primary productivity of Europe associated with different land covers, meteorological data, as well as vegetation models. We also compare the ability of BIOME-BGC to simulate annual gross primary production of forest ecosystems across Europe with two other global biogeochemical models. The later analysis is based on site-level model simulations at 37 eddy covariance EUROFLUX sites representing climate zones from boreal to Mediterranean.
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 0466 Modeling
DE: 0469 Nitrogen cycling
SC: Biogeosciences [B]
MN: 2007 Joint Assembly