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Amazonia as a carbon source linked to deforestation and climate change.
Gatti, Luciana V; Basso, Luana S; Miller, John B; Gloor, Manuel; Gatti Domingues, Lucas; Cassol, Henrique L G; Tejada, Graciela; Aragão, Luiz E O C; Nobre, Carlos; Peters, Wouter; Marani, Luciano; Arai, Egidio; Sanches, Alber H; Corrêa, Sergio M; Anderson, Liana; Von Randow, Celso; Correia, Caio S C; Crispim, Stephane P; Neves, Raiane A L.
Afiliação
  • Gatti LV; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil. luciana.gatti@inpe.br.
  • Basso LS; Nuclear and Energy Research Institute (IPEN), São Paulo, Brazil. luciana.gatti@inpe.br.
  • Miller JB; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Gloor M; Global Monitoring Laboratory, National Oceanic and Atmospheric Administration (NOAA), Boulder, CO, USA.
  • Gatti Domingues L; School of Geography, University of Leeds, Leeds, UK.
  • Cassol HLG; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Tejada G; Nuclear and Energy Research Institute (IPEN), São Paulo, Brazil.
  • Aragão LEOC; National Isotope Centre, GNS Science, Lower Hutt, New Zealand.
  • Nobre C; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Peters W; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Marani L; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Arai E; College of Life and Environmental Sciences, University of Exeter, Exeter, UK.
  • Sanches AH; Institute of Advanced Studies (IEA), University of São Paulo (USP), São Paulo, Brazil.
  • Corrêa SM; Department of Meteorology and Air Quality, Wageningen University, Wageningen, The Netherlands.
  • Anderson L; Centre for Isotope Research, University of Groningen, Groningen, The Netherlands.
  • Von Randow C; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Correia CSC; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Crispim SP; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
  • Neves RAL; General Coordination of Earth Science (CGCT), National Institute for Space Research (INPE), São José dos Campos, Brazil.
Nature ; 595(7867): 388-393, 2021 07.
Article em En | MEDLINE | ID: mdl-34262208
Amazonia hosts the Earth's largest tropical forests and has been shown to be an important carbon sink over recent decades1-3. This carbon sink seems to be in decline, however, as a result of factors such as deforestation and climate change1-3. Here we investigate Amazonia's carbon budget and the main drivers responsible for its change into a carbon source. We performed 590 aircraft vertical profiling measurements of lower-tropospheric concentrations of carbon dioxide and carbon monoxide at four sites in Amazonia from 2010 to 20184. We find that total carbon emissions are greater in eastern Amazonia than in the western part, mostly as a result of spatial differences in carbon-monoxide-derived fire emissions. Southeastern Amazonia, in particular, acts as a net carbon source (total carbon flux minus fire emissions) to the atmosphere. Over the past 40 years, eastern Amazonia has been subjected to more deforestation, warming and moisture stress than the western part, especially during the dry season, with the southeast experiencing the strongest trends5-9. We explore the effect of climate change and deforestation trends on carbon emissions at our study sites, and find that the intensification of the dry season and an increase in deforestation seem to promote ecosystem stress, increase in fire occurrence, and higher carbon emissions in the eastern Amazon. This is in line with recent studies that indicate an increase in tree mortality and a reduction in photosynthesis as a result of climatic changes across Amazonia1,10.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Mudança Climática / Florestas / Conservação dos Recursos Naturais / Ciclo do Carbono / Sequestro de Carbono Idioma: En Revista: Nature Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Mudança Climática / Florestas / Conservação dos Recursos Naturais / Ciclo do Carbono / Sequestro de Carbono Idioma: En Revista: Nature Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido