The carbon budget of the Spanish forests

摘要: A model for the calculation of anthropogenic CO2 emissions from perturbed forests (‘extraordinary emissions’) is described. Timber production as well wildfire statistics are used, and relevant physicochemical parameters derived literature, to calculate annual amounts biomass extraordinary atmosphere Spanish — including soils in years 1960–1990; these increased 5.3 106 t (metric tons) carbon 1970 10.6 C 1990. sensitivity analysis results has been performed identify most critical parameters. Contributions observed timber growth natural vegetal detritus soil organic matter net forest flux have estimated budget between 1966 1974, which represents a gain carbon, ranging 9.2 18 millions t. Finally, methods used biospheric balance their compared discussed.