Impact on short-lived climate forcers increases projected warming due to deforestation

Autor(es):Mostrar menos -

Scott, C. E. ^[1] ; Monks, S. A. ^{[2, 3]} ; Spracklen, D. V. ^[1] ; Arnold, S. R. ^[1] ; Forster, P. M. ^[1] ; Rap, A. ^[1] ; Aijala, M. ^[4] ; Artaxo, P. ^[5] ; Carslaw, K. S. ^[1] ; Chipperfield, M. P. ^[1] ; Ehn, M. ^[4] ; Gilardoni, S. ^[6] ; Heikkinen, L. ^[4] ; Kulmala, M. ^[4] ; Petaja, T. ^[4] ; Reddington, C. L. S. ^[1] ; Rizzo, L. V. ^[7] ; Swietlicki, E. ^{[8, 9]} ; Vignati, E. ^[10] ; Wilson, C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Leeds, Inst Climate & Atmospher Sci, Sch Earth & Environm, Leeds, W Yorkshire - England

^[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO - USA

^[3] NOAA, Chem Sci Div, Earth Syst Res Lab, Boulder, CO - USA

^[4] Univ Helsinki, Dept Phys, POB 64, Helsinki 00014 - Finland

^[5] Univ Sao Paulo, Inst Phys, Sao Paulo - Brazil

^[6] CNR, Inst Atmospher Sci & Climate, Bologna - Italy

^[7] Univ Fed Sao Paulo, Dept Earth & Exact Sci, Inst Environm Chem & Pharmaceut Sci, UNIFESP, Sao Paulo - Brazil

^[8] Lund Univ, Div Nucl Phys, POB 118, S-22100 Lund - Sweden

^[9] Lund Univ, Ctr Environm & Climate Res, POB 118, S-22100 Lund - Sweden

^[10] European Commiss, Joint Res Ctr, Directorate Energy Transport & Climate, Ispra - Italy

• Tipo de documento: Artigo Científico
• Fonte: NATURE COMMUNICATIONS; v. 9, JAN 11 2018.
• Citações Web of Science: 18

Resumo

The climate impact of deforestation depends on the relative strength of several biogeochemical and biogeophysical effects. In addition to affecting the exchange of carbon dioxide (CO2) and moisture with the atmosphere and surface albedo, vegetation emits biogenic volatile organic compounds (BVOCs) that alter the formation of short-lived climate forcers (SLCFs), which include aerosol, ozone and methane. Here we show that a scenario of complete global deforestation results in a net positive radiative forcing (RF; 0.12Wm-2) from SLCFs, with the negative RF from decreases in ozone and methane concentrations partially offsetting the positive aerosol RF. Combining RFs due to CO2, surface albedo and SLCFs suggests that global deforestation could cause 0.8 K warming after 100 years, with SLCFs contributing 8% of the effect. However, deforestation as projected by the RCP8.5 scenario leads to zero net RF from SLCF, primarily due to nonlinearities in the aerosol indirect effect. (AU)

• Processo FAPESP: 08/58100-2 - Aeroclima: efeitos diretos e indiretos de aerossóis no clima da Amazônia e Pantanal
• Beneficiário: Paulo Eduardo Artaxo Netto
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático