View in EDS

The impact of reduced precipitation on methane emissions in the Amazon and its role in the global methane balance.

Saved in:
Bibliographic Details
Title: The impact of reduced precipitation on methane emissions in the Amazon and its role in the global methane balance.
Authors: Neves, Raiane A.L.1 (AUTHOR) raiane.lopesneves@gmail.com, Gatti, Luciana V.1 (AUTHOR), Cunha, Camilla L.1 (AUTHOR), Correia, Caio S.C.1 (AUTHOR), Silva, Francine M.1 (AUTHOR), Machado, Guilherme B.M.1 (AUTHOR), Morais, Christiane S.1,2,3 (AUTHOR), Lopes, Filipe Loyola1,4 (AUTHOR), Domingues, Lucas Gatti2 (AUTHOR), Sanches, Alber H.1 (AUTHOR), Arai, Egidio1 (AUTHOR), Malacarne, Marcio1 (AUTHOR), Guerra, Juan Carlos1 (AUTHOR), Marani, Luciano1 (AUTHOR)
Source: Atmospheric Environment. May2026, Vol. 372, pN.PAG-N.PAG. 1p.
Subject Terms: *Rain forests, *Rainfall, *Climate change, *Greenhouse gas mitigation, *Biotic communities, *Greenhouse gases
Abstract: After a long period of stability from 2000 to 2007, global methane (CH 4) concentrations have been increasing every year, and this increase has been mainly related to increased emissions from anthropogenic sources. The Amazon is the largest tropical forest in the world and has been experiencing major impacts due to dominantly biogenic sources. In this study, we present data obtained from vertical profiles measured between 2010 and 2023, which allow us to understand the role of the Amazon Forest in the global growth of CH 4 emissions, as well as the impact of reduced precipitation on regional emissions. Annual growth rates ranged from 9.7 to 10.3 ppb ⋅ year−1 in the regions northwest (TAB_TEF_CZS), northeast (SAN), southwest (RBA), and southeast (ALF) from Amazon. These values are similar to the global average (9.7 ppb year −1), indicating that the Amazon follows the global trend of increasing CH 4 concentrations. Although much of the Amazon is seasonally or permanently flooded, emissions from flooded areas alone are not sufficient to explain the upward trend in CH 4 concentrations. Monthly and annual flux calculations indicate regional emission patterns. The results reinforce the relevance of human action in the variability of methane emissions in the Amazon. • The increase in methane concentration in the Amazon is following the global growth trend for the period from 2010 to 2023. • We observed a reduction in annual accumulated precipitation. • There is high annual variability in the methane balance in the Amazon. • The Amazon accounts for 7% of the global methane balance and 11% of the global methane balance for the tropical belt. [ABSTRACT FROM AUTHOR]
Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: GreenFILE
Description
Abstract:After a long period of stability from 2000 to 2007, global methane (CH 4) concentrations have been increasing every year, and this increase has been mainly related to increased emissions from anthropogenic sources. The Amazon is the largest tropical forest in the world and has been experiencing major impacts due to dominantly biogenic sources. In this study, we present data obtained from vertical profiles measured between 2010 and 2023, which allow us to understand the role of the Amazon Forest in the global growth of CH 4 emissions, as well as the impact of reduced precipitation on regional emissions. Annual growth rates ranged from 9.7 to 10.3 ppb ⋅ year−1 in the regions northwest (TAB_TEF_CZS), northeast (SAN), southwest (RBA), and southeast (ALF) from Amazon. These values are similar to the global average (9.7 ppb year −1), indicating that the Amazon follows the global trend of increasing CH 4 concentrations. Although much of the Amazon is seasonally or permanently flooded, emissions from flooded areas alone are not sufficient to explain the upward trend in CH 4 concentrations. Monthly and annual flux calculations indicate regional emission patterns. The results reinforce the relevance of human action in the variability of methane emissions in the Amazon. • The increase in methane concentration in the Amazon is following the global growth trend for the period from 2010 to 2023. • We observed a reduction in annual accumulated precipitation. • There is high annual variability in the methane balance in the Amazon. • The Amazon accounts for 7% of the global methane balance and 11% of the global methane balance for the tropical belt. [ABSTRACT FROM AUTHOR]
ISSN:13522310
DOI:10.1016/j.atmosenv.2026.121860