“Regional Changes in Land-Atmospheric CO2 Exchange over Recent Decades Using Trendy DGVMs”
Stephen Sitch1, and Trendy modellers
1 University of Exeter, Exeter EX4 4QF, UK
Land ecosystems currently moderate global climate change by absorbing over one quarter of the anthropogenic emissions of carbon dioxide (CO2) on average every year (Le Quéré et al., 2015). This CO2 land ‘sink’ is modulated by changing environmental conditions, including climate change and variability, atmospheric CO2, and Land Use and Land Cover Changes (LULCC). For the historical period, 1901-2016, outputs from a suite of Dynamic Global Vegetation Models (DGVMs), driven with observed climatology, are analysed. I will summarise recent studies using the TRENDY DGVM ensemble to quantify the global and regional mean, Interannual Variability (IAV) and trends in CO2 fluxes over the period 1990-2016, attribute to underlying processes (CO2, Climate variability and LULCC), and quantify the uncertainty and level of model agreement (Sitch et al., 2015).
Le Quéré et al., Global Carbon Budget 2014, Earth Syst. Sci. Data, 7, 47-85, doi:10.5194/essd-7-47-2015.
Sitch, S, P. Friedlingstein, N. Gruber, S. Jones, G. Murray-Tortarolo, A. Ahlström, S. C. Doney, H. Graven, C. Heinze, C. Huntingford, S. Levis, P. E. Levy, M. Lomas, B. Poulter, N. Viovy, S. Zaehle, N. Zeng, A. Arneth, G. Bonan, L. Bopp, J. G. Canadell, F. Chevallier, P. Ciais, R. Ellis, M. Gloor, P. Peylin, S. Piao, C. Le Quéré, B. Smith, Z. Zhu, R. Myneni Trends and drivers of regional sources and sinks of carbon dioxide over the past two decades, Biogeosciences, 12, 653-679, 2015.