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Biogeochemical blindspots along the lower Amazon River continuum: from land to the atmosphere and ocean

Abstract

The research objective is to examine, at different scales, the processes that govern the advection and reaction of carbon in the lowest reach of the Amazon River and along the near-shore coastline of the Western Tropical Atlantic Ocean. The mainstem of the river is a large supplier of carbon dioxide (CO2) to the atmosphere, most of which is sourced as organic carbon from the surrounding landscape and subsequently remineralized in river. The component of the river system that is least well understood is the lower tidal reach, which consists of two main channels across from Macapá down 150 km to the ocean. While tidal forcing does not result in salt intrusion, riverine flow in this reach can be reversed, and complex interactions occur between the river channels and the fringe areas, making the study of this component of the world's largest river a significant logistical challenge. Through an ambitious field study, the project aims to understand the large-scale drivers (e.g. hydrodynamics, areal extent, metabolism) that create the spatial and temporal variability in carbon remineralization and CO2 fluxes in the lower river. This will be addressed using a combination of fieldwork, remote sensing and modeling. In addition, the types of organic matter that are degraded, the microorganisms and consortia that remineralize, and the metabolic pathways (aerobic, anaerobic) that lead to the large production of CO2 will be evaluated using a combination of organic geochemical and molecular biological (proteomic) tools. The proposed work will provide in situ observations in a previously unstudied region of high global importance, experimentation focused on unraveling the influence of physical factors (e.g. tides, current velocity, and mixing) on biological processes, spatial and temporal variability of CO2 fluxes by remote sensing, and modeling tools capable of predicting the sensitivity of Net Ecosystem Exchange (NEE). (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
Black carbon found in the Amazon River reveals recent forest burnings 
Articles published in other media outlets (52 total):
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Estadão.com: Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Folha.com: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Portal Exame: Carbono negro é encontrado no rio Amazonas após queimadas na floresta (20/Sep/2019)
Nature World News (EUA): Black Carbon Found in the Amazon River Reveals Recent Forest Burnings (30/Dec/2019)
Espaço Ecológico no Ar: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (25/Nov/2019)
BNC Amazonas: Rio Amazonas leva carbono negro das queimadas até o mar (25/Nov/2019)
EcoDebate: Queimadas na Amazônia deixam vestígios no rio Amazonas e em seus afluentes (22/Nov/2019)
Environmental News Network (EUA): Black Carbon Found in the Amazon River Reveals Recent Forest Burnings (20/Nov/2019)
Phys.Org (Reino Unido): Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
NCYT Amazings (Espanha): El carbono negro hallado en el río Amazonas revela incendios recientes en la selva (20/Nov/2019)
Bioengineer (Reino Unido): Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
Science Codex: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
Scienmag Science Magazine (Reino Unido): Black Carbon Found In The Amazon River Reveals Recent Forest Burnings (20/Nov/2019)
Brightsurf: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
Career Biotech: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
Pharma Jobs: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
7thSpace: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
EresViral (República Dominicana): El carbono negro hallado en el río Amazonas revela incendios recientes en la selva (20/Nov/2019)
Infomediatico: El carbono negro hallado en el río Amazonas revela incendios recientes en la selva (20/Nov/2019)
Scienstack: Black carbon found in the Amazon River reveals recent forest burnings (20/Nov/2019)
https://www.industryglobalnews24.com/: A new study attributes the finding of black carbon in the amazon river to recent forest burning (20/Nov/2019)
Innovations Report (Alemanha): Black Carbon Found in the Amazon River Reveals Recent Forest Burnings (20/Nov/2019)
Revista Ecológico online: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (27/Sep/2019)
Sou Ecológico: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (27/Sep/2019)
Sociedade Científica: Carbono negro no rio Amazonas é prova de queimadas recentes na floresta (26/Sep/2019)
Jornal Joseense News: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (24/Sep/2019)
Portal Paraná Empresarial: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (24/Sep/2019)
Brasil CT&I: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (24/Sep/2019)
Confap - Conselho Nacional das Fundações Estaduais de Amparo à Pesquisa: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (23/Sep/2019)
Innovaspain (Espanha): El carbono negro en el río Amazonas, la huella que revela los recientes incendios forestales (23/Sep/2019)
ImprenÇa: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (23/Sep/2019)
Gazeta de Santarém online: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (22/Sep/2019)
Espaço Ecológico no Ar: Carbono negro é encontrado no rio Amazonas após queimadas na floresta (21/Sep/2019)
ArqBrasil: Carbono revela queimadas (21/Sep/2019)
Terra: Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Terra: Carbono negro encontrado no Rio Amazonas revela queimadas (20/Sep/2019)
MSN: Carbono negro é encontrado no rio Amazonas após queimadas na floresta (20/Sep/2019)
Portogente: Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Ariquemes : Carbono negro é encontrado no rio Amazonas após queimadas na floresta (20/Sep/2019)
Conexão Tocantins : Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Climatempo: Carbono negro encontrado no Rio Amazonas revela queimadas (20/Sep/2019)
Em Tempo (Manaus, AM) online: Carbono negro no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Blog Pregopontocom Tudo: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
JC Notícias (São Paulo, SP): Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Blog da Biblioteca da Escola de Engenharia e do Instituto de Computação: Carbono negro é encontrado no rio Amazonas após queimadas na floresta (20/Sep/2019)
Portal Neo Mondo: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Press From Brasil (EUA): Carbono negro é encontrado no rio Amazonas após queimadas na floresta (20/Sep/2019)
Press From Brasil (EUA): Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
W Rádio Brasil: Carbono negro encontrado no rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Curiosidades 10: Carbono negro é encontrado no rio Amazonas após queimadas (20/Sep/2019)
Portal Tucumã: Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)
Head Topics (Brasil): Carbono negro encontrado no Rio Amazonas revela queimadas recentes na floresta (20/Sep/2019)