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CarboEurope Results: Vulnerability of Carbon Sink by Climate Change

CarboEurope Results: Vulnerability of Carbon Sink by Climate Change. Chairman Han Dolman Alterra, Wageningen, The Netherlands. European Office Annette Freibauer Max-Planck-Institute for Biogeochemistry, Jena, Germany. http://www.bgc-jena.mpg.de/public/carboeur/.

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CarboEurope Results: Vulnerability of Carbon Sink by Climate Change

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  1. CarboEurope Results: Vulnerability of Carbon Sink by Climate Change Chairman Han Dolman Alterra, Wageningen, The Netherlands European Office Annette Freibauer Max-Planck-Institute for Biogeochemistry, Jena, Germany http://www.bgc-jena.mpg.de/public/carboeur/

  2. West European land uptake:NAO linked? Ciais et al.

  3. ECCP Working Group Research, Subgroup Sinks Stockholm Meeting: Sinks in Europe Forest Grassland Arable Land Wetland Area (Mio ha) 130 76 73 19 C stock (Pg) 6.8 ? 3.86 13.1 Sink (Pg/y) 0.1-0.7 ? 0 0.004-0.01 Other GHGs source? source source source!

  4. 90 60 20795 30 0 0 30 60 90 Freeze/Thaw and Ice Affected Regions (Global Freezing Index) Approximate distribution of frost and ice affected regions (i.e. areas with a freezing index > 0). Global freezing index is defined as the cumulative number of degree-days with air temperatures below 0 °C as determined from long-term (1920 - 1980) mean monthly global surface air temperatures. (Source: Legates and Willmott 1990, courtesy of NSIDC).

  5. Boreal Spring Freeze-Thaw Transition Events from: Running, Way, McDonald, Kimball, Frolking, Keyser and Zimmermann EOS Trans. AGU (1999)

  6. Growing season length critical in boreal systems Example: Northern Finland

  7. Inter-Annual Variability of Net Carbon Ecosystem Exchange in a Boreal Picea mariana Stand Simulated daily net carbon exchange (NEE) accumulation within a mature boreal Picea mariana (black spruce) stand in central Manitoba, Canada (after Frolking et al. 1996).

  8. Interannual variability in NEE in temperate coniferous forest driven by NPP?Example: Scots Pine in NL

  9. Mediterranean forest: NEE driven by drought limitation of soil respiration? Example: Soil respiration for Q. ilex forest 1996 - 1998 30 Sresp 13 RH soil 25 ) T soil -1 11 sec -2 20 mol m 9 m soil moisture (%Vol.) ,soil temperature(°C) 15 7 soil efflux ( 10 5 2 CO 5 3 1 0 2/96 3/96 4/96 5/96 6/96 7/96 8/96 9/96 1/97 3/97 3/97 4/97 5/97 6/97 7/97 8/97 9/97 1/98 2/98 3/98 4/98 5/98 6/98 7/98 8/98 9/98 10/96 11/96 12/96 12/96 10/97 11/97 12/97 10/98 11/98 12/98 date

  10. Carbon sink indicators: • Biome-specific change in C stocks and C fluxes • Separate indicators for soil and biomass • Boreal regions: • vulnerability of soil C through temperature rise • enhanced NPP through longer growing season • risk of high CH4 release from warming wetlands • Temperate regions: • vulnerability of NPP to extreme events • vulnerability of NPP by drought spells • Mediterranean regions: • drought limitation of soil respiration • vulnerability of C stocks by drought and fire

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