21st Century drought-related fires counteract the decline of Amazon deforestation carbon emissions

Autor(es):Mostrar menos -

Aragao, Luiz E. O. C. ^{[1, 2]} ; Anderson, Liana O. ^{[3, 4]} ; Fonseca, Marisa G. ^[2] ; Rosan, Thais M. ^[2] ; Vedovato, Laura B. ^[2] ; Wagner, Fabien H. ^[2] ; Silva, Camila V. J. ^{[5, 2]} ; Silva Junior, Celso H. L. ^[2] ; Arai, Egidio ^[2] ; Aguiar, Ana P. ^{[6, 7]} ; Barlow, Jos ^[5] ; Berenguer, Erika ^{[5, 3]} ; Deeter, Merritt N. ^[8] ; Domingues, Lucas G. ^{[6, 9]} ; Gatti, Luciana ^{[6, 9]} ; Gloor, Manuel ^[10] ; Malhi, Yadvinder ^[3] ; Marengo, Jose A. ^[4] ; Miller, John B. ^{[11, 12]} ; Phillips, Oliver L. ^[10] ; Saatchi, Sassan ^[13]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ Exeter, Coll Life & Environm Sci, Exeter EX4 4RJ, Devon - England

^[2] Natl Inst Space Res, Remote Sensing Div, Av Astronautas 1-758, BR-12227010 Sao Jose Dos Campos - Brazil

^[3] Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY - England

^[4] Natl Ctr Monitoring & Early Warning Nat Disasters, Sao Jose Dos Campos - Brazil

^[5] Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ - England

^[6] Natl Inst Space Res, Earth Syst Sci Ctr, Av Astronautas 1-758, BR-12227010 Sao Jose Dos Campos - Brazil

^[7] Stockholm Univ, Stockholm Resilience Ctr, Kraftriket 2B, SE-10691 Stockholm - Sweden

^[8] Natl Ctr Atmospher Res, Atmospher Chem & Observat Lab, Boulder, CO 80301 - USA

^[9] IPEN, CNEN, Atmospher Chem Lab, 2242 Ave Prof Lineu Prestes, Cidade Univ, BR-05508000 Sao Paulo - Brazil

^[10] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire - England

^[11] Univ Colorado, Global Monitoring Div, NOAA, Earth Syst Res Lab, Boulder, CO 80305 - USA

^[12] Univ Colorado, CIRES, Boulder, CO 80305 - USA

^[13] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 - USA

• Tipo de documento: Artigo Científico
• Fonte: NATURE COMMUNICATIONS; v. 9, FEB 13 2018.
• Citações Web of Science: 52

Resumo

Tropical carbon emissions are largely derived from direct forest clearing processes. Yet, emissions from drought-induced forest fires are, usually, not included in national-level carbon emission inventories. Here we examine Brazilian Amazon drought impacts on fire incidence and associated forest fire carbon emissions over the period 2003-2015. We show that despite a 76% decline in deforestation rates over the past 13 years, fire incidence increased by 36% during the 2015 drought compared to the preceding 12 years. The 2015 drought had the largest ever ratio of active fire counts to deforestation, with active fires occurring over an area of 799,293 km(2). Gross emissions from forest fires (989 +/- 504 Tg CO2 year(-1)) alone are more than half as great as those from old-growth forest deforestation during drought years. We conclude that carbon emission inventories intended for accounting and developing policies need to take account of substantial forest fire emissions not associated to the deforestation process. (AU)

• Processo FAPESP: 08/57719-9 - Programa de Mudanças Climáticas - INCT CLIMA
• Beneficiário: Carlos Afonso Nobre
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 11/51841-0 - UK/Brazil research network for an Amazonian Carbon Observatory
• Beneficiário: Luciana Vanni Gatti
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular
• Processo FAPESP: 15/50484-0 - Diversidade funcional dos biomas Amazônia, Mata Atlântica e Cerrado nos ambientes intactos e em regeneração por meio de imagens hiperspectrais
• Beneficiário: Fabien Hubert Wagner
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 08/58120-3 - Carbon tracker and water availability controls of land use and climate changes
• Beneficiário: Humberto Ribeiro da Rocha
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático