Skip to Main content Skip to Navigation
Journal articles

Fires increase Amazon forest productivity through increases in diffuse radiation

Abstract : Atmospheric aerosol scatters solar radiation increasing the fraction of diffuse radiation and the efficiency of photosynthesis. We quantify the impacts of biomass burning aerosol (BBA) on diffuse radiation and plant photosynthesis across Amazonia during 1998-2007. Evaluation against observed aerosol optical depth allows us to provide lower and upper BBA emissions estimates. BBA increases Amazon basin annual mean diffuse radiation by 3.4-6.8% and net primary production (NPP) by 1.4-2.8%, with quoted ranges driven by uncertainty in BBA emissions. The enhancement of Amazon basin NPP by 78-156TgCa(-1) is equivalent to 33-65% of the annual regional carbon emissions from biomass burning. This NPP increase occurs during the dry season and acts to counteract some of the observed effect of drought on tropical production. We estimate that 30-60TgCa(-1) of this NPP enhancement is within woody tissue, accounting for 8-16% of the observed carbon sink across mature Amazonian forests.
Document type :
Journal articles
Complete list of metadata

Cited literature [50 references]  Display  Hide  Download
Contributor : Archive Ouverte Prodinra <>
Submitted on : Thursday, May 28, 2020 - 2:53:55 PM
Last modification on : Tuesday, August 17, 2021 - 9:44:01 AM


Publisher files allowed on an open archive




A. Rap, D. V. Spracklen, L. Mercado, C. L. Reddington, J. M. Haywood, et al.. Fires increase Amazon forest productivity through increases in diffuse radiation. Geophysical Research Letters, American Geophysical Union, 2015, 42 (11), pp.4654-4662. ⟨10.1002/2015GL063719⟩. ⟨hal-01269165⟩



Record views


Files downloads