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Impact des tempêtes de 1999 sur le bilan de carbone des forêts françaises

Abstract : We propose an evaluation of the impact of the 1999 windstorms on carbon fluxes in French forests. Three major impacts were identified: the storms redistributed carbon between ecosystem carbon pools, they resulted in postdisturbance emissions (burning of harvest residues, decay of residual biomass), and they reset the damaged stands on new growth trajectories. The bases for this evaluation are on one hand an inventory of fallen and broken trees (volume and area), and on the other hand the distribution of the windfalls according to their destination: harvested, burnt, or left in the forest. Because only sparse data are available, we made several assumptions, which introduced uncertainties into the final estimates. The storms of 1999 have reduced the carbon sink of the French forests rather strongly from 2000 to 2002 (-5.23 million tons of carbon (MtC) in 2000, which represents 31 % of the average annual forest sink between 1984 and 1996, -3.78 MtC or -22 % in 2001, -2.96 MtC or -17 % in 2002) and then more moderately: -11 to -8 % from 2003 to 2016, until negligible effects from 2040 onward.
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Submitted on : Saturday, June 6, 2020 - 11:07:39 PM
Last modification on : Monday, December 21, 2020 - 6:34:01 PM


  • HAL Id : hal-02824868, version 1
  • PRODINRA : 45122



Gérome Pignard, Jean-Luc Dupouey, André Granier, Michel Morel. Impact des tempêtes de 1999 sur le bilan de carbone des forêts françaises. La forêt face aux tempêtes, Editions Quae, 2009, Synthèses (Quae), 978-2-7592-0330-7. ⟨hal-02824868⟩



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