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The bottom-up approach

The bottom-up approach. Soils Network. Eddy Flux network. Zanchi et al. in press. Ciais et al., 2008. Magnani et al., 2007. Harrison et al., 2000. Kutsch, Rebmann, unpublished. Janssens, Ciais, Luyssaert and Schulze, unpublished. at canopy level GPP is very similar.

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The bottom-up approach

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  1. The bottom-up approach

  2. Soils Network

  3. Eddy Flux network

  4. Zanchi et al. in press

  5. Ciais et al., 2008

  6. Magnani et al., 2007

  7. Harrison et al., 2000

  8. Kutsch, Rebmann, unpublished

  9. Janssens, Ciais, Luyssaert and Schulze, unpublished

  10. at canopy level GPP is very similar Janssens, Ciais, Luyssaert and Schulze, unpublished

  11. grassland > forest Janssens, Ciais, Luyssaert and Schulze, unpublished

  12. other GHGs • balance the grassland sink • increase cropland losses Janssens, Ciais, Luyssaert and Schulze, unpublished

  13. forest biomass sink not secure Janssens, Ciais, Luyssaert and Schulze, unpublished

  14. The top-down approach

  15. Atmospheric network

  16. Figure: M. Heimann

  17. The European GHG balance

  18. GHGs add 10% to GWP

  19. ecosystems compensate 10% of fossil and other fluxes the N2O flux is as large as the forest sink

  20. the entire European sink is in Eastern Europe

  21. Conclusions • The GHG balance of EU-25 is zero • The Euopean GHG sink is located in eastern Europe • We cannot study the carbon cycle in isolation. We have to seriously take the N-cycle on board

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