The bottom-up approach
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The European Carbon Balance by atmospheric and terrestrial mesurements - An update of the dual constraint approach to derive a continental C balance E-D Schulze, P Ciais, S Luyssaert, JF Soussana, P Smith,
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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 Kutsch, Rebmann, unpublished. Janssens, Ciais, Luyssaert and Schulze, unpublished.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. - PowerPoint PPT Presentation
Transcript of The bottom-up approach
The European Carbon Balance by atmospheric and terrestrial mesurements
-
An update of the dual constraint approach
to derive a continental C balance
E-D Schulze, P Ciais, S Luyssaert, JF Soussana, P Smith, I Janssens, H Dolman, R Valentini, M Heimann
The European Carbon BalanceE-D Schulze et al.
The European Carbon BalanceE-D Schulze et al.
The European Carbon BalanceE-D Schulze et al.
The European Carbon BalanceE-D Schulze et al.
The bottom-up approach
The European Carbon BalanceE-D Schulze et al.
Soils Network
The European Carbon BalanceE-D Schulze et al.
Eddy Flux network
main flux sites
active associated
sitestotal
coniferous 12 11 23
deciduous 8 3 11
evergreen broadleaf 4 2 6
mixed coniferous/deciduous
2 1 3
crops 9 16 25
grassland 15 8 23
total 50 41 91
The European Carbon BalanceE-D Schulze et al.
Zanch
i et
al. in p
ress
The European Carbon BalanceE-D Schulze et al.
Ciais et al., 2008
The European Carbon BalanceE-D Schulze et al.
Magnani et al., 2007
The European Carbon BalanceE-D Schulze et al.
Harrison et al., 2000
The European Carbon BalanceE-D Schulze et al.
Kutsch, Rebmann,unpublished
The European Carbon BalanceE-D Schulze et al.
Janssens, Ciais, Luyssaert and Schulze, unpublished
The European Carbon BalanceE-D Schulze et al.
Janssens, Ciais, Luyssaert and Schulze, unpublished
at canopy levelGPP is very similar
The European Carbon BalanceE-D Schulze et al.
Janssens, Ciais, Luyssaert and Schulze, unpublished
grassland > forest
The European Carbon BalanceE-D Schulze et al.
Janssens, Ciais, Luyssaert and Schulze, unpublished
other GHGs-balance the grassland sink-increase cropland losses
The European Carbon BalanceE-D Schulze et al.
forest biomasssink not secure
Janssens, Ciais, Luyssaert and Schulze, unpublished
The European Carbon BalanceE-D Schulze et al.
The top-down approach
The European Carbon BalanceE-D Schulze et al.
Atmospheric network
The European Carbon BalanceE-D Schulze et al.
Figure: M. Heimann
The European Carbon BalanceE-D Schulze et al.
The European Carbon BalanceE-D Schulze et al.
The European Carbon BalanceE-D Schulze et al.
The European GHG balance
The European Carbon BalanceE-D Schulze et al.
GHGs add10% toGWP
The European Carbon BalanceE-D Schulze et al.
ecosystemscompensate 10% of fossil and other fluxes
the N2O flux is as large as the forest sink
The European Carbon BalanceE-D Schulze et al.
Average of top-down & bottom-up fluxes
The continent of Europe
New estimate by CarboEurope-IP
EU-25 New estimate by CarboEurope-IP
Flux
(Tg C yr-1) Relative
uncertainty Flux
(Tg C yr-1) Relative
uncertainty
Av. land-atmosphere CO2-flux 1294 * * 945 * *
Av. GHG CO2eq flux (CO2+CH4+N2O) 1513 * -1086 *
Av. ecosystem CO2 balance (forest, grassland, crops, peatland)
-337 * -143 *
Av. ecosystem GHG CO2eq balance (CO2+CH4+N2O) -117 * -3 *
Av. land-based CO2 balance (ecosystems+river export+peat extraction+landfill)
-344 * -143 *
Av. land-based GHG CO2eq balance -124 * -2 *
the entire European sink is in Eastern Europe
The European Carbon BalanceE-D Schulze et al.
• 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
