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Carbon Budget of European Forests: Inventory-Based Method

This study presents an inventory-based approach using EFISCEN and CarboInvent models to analyze the carbon budget of European forests, including regional data (2000-2005) upscaled to total forest area, different component contributions, and long-term flux ratios. The discussion highlights gaps in data related to natural mortality, forest management, wood supply availability, disturbances, and soil carbon stocks. Conclusions reveal insights on net primary productivity, net ecosystem productivity, and sequestration rates across different forest types and regions. The study emphasizes the importance of upscaling and identifies areas for further research.

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Carbon Budget of European Forests: Inventory-Based Method

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  1. Giuliana Zanchi , Hans Verkerk, Marcus Lindner Carbon budget of European Forests: an inventory based method Poznan, Poland 8 -12 October 2007

  2. Outline Methods Model results - regional (2000-2005) - upscaling to total forest - contribution by different components - long term - flux ratios 3. Discussion 4. Conclusions

  3. 1. Methods Forest C-budget  Inventory based approach EFISCEN model CarboInvent Yasso model

  4. Input from other models Forest types Growth changes due to environm. change Forest managem. Wood demand Afforest./ Deforest. Volume scenario Age Projections of: • Stem/wood volume • Net annual increment • Age class distribution • Removals • Forest area (AWS) • Natural mortality Felling residues Soil module: C stocks and Rh Whole tree carbon stocks Litterfall EFISCEN Data from national forest inventories matrix Matrix generator EFISCEN matrix simulator

  5. 2. MODEL RESULTS

  6. tC ha-1 Forest C stock (2005) Tot: 147.9 tC ha-1 Trees: 67.1 tC ha-1 Soil: 80.9 tC ha-1

  7. Forest NBP (2000-2005) C stock change in trees and soil Forest NEP (2000-2005) C stock change in trees and soil +removals

  8. C stock change in trees and soil + removals + Rh

  9. Upscaling EFI forest map Upscaling to total forest area European Forest Institute, 2002

  10. Total forest area • Forest: 150 Mha • NPP: 428 TgC yr-1 • NEP: 128.5 TgC yr-1 • NBP: 69.5 TgC yr-1

  11. Forest area change • Additional annual increase: • Forest: 0.65 Mha yr-1 • NPP: 1.85 TgC yr-1 • NEP: 0.56 TgC yr-1 • NBP: 0.30 TgC yr-1

  12. Different component contribution to the NPP

  13. Different component contribution to the NEP

  14. Ratio: NEP/NPP

  15. Ratio: NBP/NPP

  16. Long term period Forest C stock change (NBP) 2000 -2060

  17. Discussion: gaps • Natural mortality: • - Management practices • - Forest available/not available for wood supply • - Variable: 0.5 – 7% of NPP (higher in Nordic countries) • Disturbances: ? • Soil: • C stock change as a differnce between litter inputs and respiration (e.g. leakage not accounted) • Forest area changes: • Natural expansion, afforestation

  18. Conclusions • NPP: 285 gCm-2yr-1 (428 TgC yr-1) • NEP: 85.5 gCm-2yr-1 (128.5 TgC yr-1) • Higher for central Europe and broadleaves • Rh is 70% of NPP; fellings 50% of NEP • (Liski et al. 2006) • Upscaling: forest not available for wood supply might have different NPP, NEP, NBP • Missing some flux components (e.g. fires) • Next step: comparison

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