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Effect of biomass burning emission on carbon assimilation over Brazilian Pantanal

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Abstract

Currently, changes in rainfall regimes have intensified biomass burning in central Brazil. These fires, resulting mainly from anthropic action, emit large amounts of gases and aerosols into the atmosphere. The emission of these constituents in the dry season can drastically alter the functioning of ecosystems. In this work, it was verified that the high concentrations of Black Carbon (BC) have a direct relationship with the air temperature and influence the carbon capture process. This study was the result of a long-term campaign carried out in the northern region of the Brazilian Pantanal, between 2017 and 2019. Measurements of CO2 fluxes were evaluated together with measurements of temperature, radiation and BC concentrations. The results showed that in some episodes, the increase in BC concentration inhibits photosynthetically active radiation and increases air temperature. As a consequence of the increase in BC concentration, a reduction in carbon capture was observed. In a specific episode in October 2017, this work estimated a deficit of 1.65 kg.m−2 in CO2 capture due to the emission of BC in the Pantanal.

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Funding

The authors thank CAPES for the financial support (Process n° 01439213127) and the research group of the Graduate Program in Environmental Physics (Project of 457824/2013–1 approved process in call n° 68/2013 MCTI/CNPq/FNDCTCross action/LBA) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) with Bolsa de Produtividade em Pesquisa—PQ Grant Number 308844/2018–1. We thank the scientists and technicians responsible for operating and maintaining the instrumentation over the course of many years that generated this high-quality data set and ultimately enabled this paper to be written. The researcher Paulo Artaxo and his group from the Atmospheric Physics laboratory of the University of São Paulo (USP).

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LFAC, JBM, HJAS, HJD performed material preparation, data collection, and analysis; SRP, LFAC, IJCP and TRR were responsible for preparing the first version of the manuscript text; TRR, SRP, RSP and LFAC corrected and improved the manuscript; TRR, SRP and LFAC were responsible for reviewing the database and to discuss the findings. All authors read and approved the final version of the manuscript.

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Correspondence to Thiago Rangel Rodrigues.

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We declare that this manuscript is original, has not been published before and is not currently being considered for publication elsewhere. We further confirm that any aspect of the work covered in this manuscript has been conducted with the ethical approval of all relevant bodies.

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The authors have no competing interests to declare that are relevant to the content of this article.

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Curado, L.F.A., de Paulo, S.R., da Silva, H.J.A. et al. Effect of biomass burning emission on carbon assimilation over Brazilian Pantanal. Theor Appl Climatol 155, 999–1006 (2024). https://doi.org/10.1007/s00704-023-04673-0

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  • DOI: https://doi.org/10.1007/s00704-023-04673-0

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