Data/hora: 02/06/2024 16:44:57

Biblioteca(s): | Embrapa Amazônia Oriental.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 12/03/2019
Data da última atualização: | 27/12/2019
Autoria: | WITHEY, K.; BERENGUER, E.; PALMEIRA, A. F.; ESPÍRITO-SANTO, F. D. B.; LENNOX, G. D.; SILVA, C. V. J.; ARAGÃO, L. E. O. C.; FERREIRA, J. N.; FRANÇA, F.; MALHI, Y.; ROSSI, L. C.; BARLOW, J.
Afiliação: | Kieran Withey, Lancaster University; Erika Berenguer, Lancaster University / University of Oxford; Alessandro Ferraz Palmeira, UFPA; Fernando D. B. Espírito-Santo, University of Leicester; Gareth D. Lennox, Lancaster University; Camila V. J. Silva, Lancaster University; Luiz E. O. C. Aragão, INPE / University of Exeter; JOICE NUNES FERREIRA, CPATU; Filipe França, Lancaster University / CPATU / IFMG; Yadvinder Malhi, University of Oxford; Liana Chesini Rossi, UNESP; Jos Barlow, Lancaster University.
Título: | Quantifying immediate carbon emissions from El Ninõ-mediated wildfires in humid tropical forests.
Ano de publicação: | 2018
Fonte/Imprenta: | Philosophical Transactions of the Royal Society B, v. 373, n. 1760, p. 1-11, Nov. 2018.
DOI: | 10.1098/rstb.2017.0312
Idioma: | Inglês
Conteúdo: | Wildfires produce substantial CO2 emissions in the humid tropics during El Niño-mediated extreme droughts, and these emissions are expected to increase in coming decades. Immediate carbon emissions from uncontrolled wildfires in human-modified tropical forests can be considerable owing to high necromass fuel loads. Yet, data on necromass combustion during wildfires are severely lacking. Here, we evaluated necromass carbon stocks before and after the 2015?2016 El Niño in Amazonian forests distributed along a gradient of prior human disturbance. We then used Landsat-derived burn scars to extrapolate regional immediate wildfire CO2 emissions during the 2015?2016 El Niño. Before the El Niño, necromass stocks varied significantly with respect to prior disturbance and were largest in undisturbed primary forests (30.2 ± 2.1 Mg ha&#8722;1, mean ± s.e.) and smallest in secondary forests (15.6 ± 3.0 Mg ha&#8722;1). However, neither prior disturbance nor our proxy of fire intensity (median char height) explained necromass losses due to wildfires. In our 6.5 million hectare (6.5 Mha) study region, almost 1 Mha of primary (disturbed and undisturbed) and 20 000 ha of secondary forest burned during the 2015?2016 El Niño. Covering less than 0.2% of Brazilian Amazonia, these wildfires resulted in expected immediate CO2 emissions of approximately 30 Tg, three to four times greater than comparable estimates from global fire emissions databases. Uncontrolled understorey wildfires in humid tropical forests during extreme droughts are a large and poorly quantified source of CO2 emissions.
Palavras-Chave: | Emissão de carbono.
Thesagro: | Carbono; Floresta Tropical Úmida; Incêndio Florestal.
Thesaurus Nal: | El Nino.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (55729-1) - UPC - AP - DD -  -  -  - DIS