Climate drivers of the Amazon forest greening

Autor(es)

Wagner, Fabien Hubert ; Herault, Bruno ; Rossi, Vivien ; Hilker, Thomas ; Maeda, Eduardo Eiji ; Sanchez, Alber ; Lyapustin, Alexei I. ; Galvao, Lenio Soares ; Wang, Yujie ; Aragao, Luiz E. O. C.

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 12, n. 7 JUL 14 2017.
• Citações Web of Science: 25

Resumo

Our limited understanding of the climate controls on tropical forest seasonality is one of the biggest sources of uncertainty in modeling climate change impacts on terrestrial ecosystems. Combining leaf production, litterfall and climate observations from satellite and ground data in the Amazon forest, we show that seasonal variation in leaf production is largely triggered by climate signals, specifically, insolation increase (70.4% of the total area) and precipitation increase (29.6%). Increase of insolation drives leaf growth in the absence of water limitation. For these non-water-limited forests, the simultaneous leaf flush occurs in a sufficient proportion of the trees to be observed from space. While tropical cycles are generally defined in terms of dry or wet season, we show that for a large part of Amazonia the increase in insolation triggers the visible progress of leaf growth, just like during spring in temperate forests. The dependence of leaf growth initiation on climate seasonality may result in a higher sensitivity of these ecosystems to changes in climate than previously thought. (AU)

• Processo FAPESP: 16/17652-9 - Diversidade funcional dos biomas Amazônia, Mata Atlântica e Cerrado nos ambientes intactos e em regeneração por meio de imagens hiperspectrais
• Beneficiário: Fabien Hubert Wagner
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 16/03397-7 - Ferramentas para gerenciar imagens de satélite em array databases
• Beneficiário: Alber Hamersson Sánchez Ipia
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 13/14520-6 - Quantificação e modelagem da sazonalidade da produção primária líquida florestal pantropical usando observações de campo e dados de sensoriamento remoto
• Beneficiário: Fabien Hubert Wagner
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores