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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Amazon methane budget derived from multi-year airborne observations highlights regional variations in emissions

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Basso, Luana S. [1] ; Marani, Luciano [1] ; Gatti, V, Luciana ; Miller, John B. [2] ; Gloor, Manuel [3] ; Melack, John [4, 5] ; Cassol, Henrique L. G. [6] ; Tejada, Graciela [6] ; Domingues, Lucas G. [6, 7, 8] ; Arai, Egidio [6] ; Sanchez, Alber H. [6] ; Correa, Sergio M. [6, 9] ; Anderson, Liana [10] ; Aragao, Luiz E. O. C. [6] ; Correia, Caio S. C. [6, 7] ; Crispim, Stephane P. [6] ; Neves, Raiane A. L. [6]
Total Authors: 17
Affiliation:
[1] Natl Inst Space Res INPE, Gen Coordinat Earth Sci CGCT, Sao Jose Dos Campos - Brazil
[2] Natl Ocean & Atmospher Adm NOAA, Global Monitoring Lab, Boulder, CO - USA
[3] Univ Leeds, Sch Geog, Leeds, W Yorkshire - England
[4] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 - USA
[5] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 - USA
[6] Gatti, Luciana, V, Natl Inst Space Res INPE, Gen Coordinat Earth Sci CGCT, Sao Jose Dos Campos - Brazil
[7] Gatti, Luciana, V, Nucl & Energy Res Inst IPEN, Sao Paulo, SP - Brazil
[8] GNS Sci, Natl Isotope Ctr, Lower Hutt - New Zealand
[9] UERJ Rio de Janeiro State Univ, Resende - Brazil
[10] Natl Ctr Monitoring & Early Warning Nat Disasters, Sao Jose Dos Campos - Brazil
Total Affiliations: 10
Document type: Journal article
Source: COMMUNICATIONS EARTH & ENVIRONMENT; v. 2, n. 1 NOV 29 2021.
Web of Science Citations: 0
Abstract

Atmospheric methane concentrations were nearly constant between 1999 and 2006, but have been rising since by an average of similar to 8 ppb per year. Increases in wetland emissions, the largest natural global methane source, may be partly responsible for this rise. The scarcity of in situ atmospheric methane observations in tropical regions may be one source of large disparities between top-down and bottom-up estimates. Here we present 590 lower-troposphere vertical profiles of methane concentration from four sites across Amazonia between 2010 and 2018. We find that Amazonia emits 46.2 +/- 10.3 Tg of methane per year (similar to 8% of global emissions) with no temporal trend. Based on carbon monoxide, 17% of the sources are from biomass burning with the remainder (83%) attributable mainly to wetlands. Northwest-central Amazon emissions are nearly aseasonal, consistent with weak precipitation seasonality, while southern emissions are strongly seasonal linked to soil water seasonality. We also find a distinct east-west contrast with large fluxes in the northeast, the cause of which is currently unclear. (AU)

FAPESP's process: 08/58120-3 - Carbon tracker and water availability controls of land use and climate changes
Grantee:Humberto Ribeiro da Rocha
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 20/02656-4 - Net carbon exchanges in the Amazon conciliating satellite data, ground data, and atmospheric profile in a decade of observation using bottom-up approach
Grantee:Henrique Luis Godinho Cassol
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 18/14423-4 - Modeling a decade of carbon gross emissions from forest fires in the Amazon: Conciliating the bottom-up and top-down views of the problem
Grantee:Henrique Luis Godinho Cassol
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 11/51841-0 - UK/Brazil research network for an Amazonian Carbon Observatory
Grantee:Luciana Vanni Gatti
Support Opportunities: Research Program on Global Climate Change - Regular Grants
FAPESP's process: 19/23654-2 - Estimation of Amazon greenhouse gas balances from atmospheric concentrations using inverse modelling of atmospheric transport with TOMCAT model
Grantee:Luana Santamaria Basso
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 18/14006-4 - Estimation of Amazon Greenhouse Gas balances from atmospheric concentrations using inverse modelling of atmospheric transport
Grantee:Luana Santamaria Basso
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/02018-2 - Interannual variation of Amazon Basin greenhouse gas balances and their controls in a warming and increasingly variable climate – Carbam: the Amazon carbon balance long-term study
Grantee:Luciana Vanni Gatti
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 19/21789-8 - The use of multivariate techniques and neural network predictions to the greenhouse gases database, climate parameters and biomass burning at Amazon
Grantee:Luciana Vanni Gatti
Support Opportunities: Research Grants - Visiting Researcher Grant - Brazil
FAPESP's process: 11/17914-0 - Determination of Methane Emissions in the Amazon Basin
Grantee:Luana Santamaria Basso
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/18493-7 - Correlation between greenhouse gases, natural processes and land use in the Amazon Basin region
Grantee:Graciela Tejada Pinell
Support Opportunities: Scholarships in Brazil - Post-Doctoral