Turbulence regimes in the stable boundary layer above the Amazon Rainforest





Tropical forest, Turbulence regimes, Roughness sublayer


We identify two nocturnal turbulence regimes at different heights above the Amazon Forest and their variation in relation to the proximity of the forest canopy. We analyzed fast response data measured at the Uatumã Sustainable Development Reserve in central Amazonia, Brazil, during September 2021 to January 2022. Our results show that the threshold wind speed that separate the weak turbulence regime from strong turbulence regime increased as a function of the distance above the canopy (43 m, 50 m, 75 m, 100 m, 127 m, 151 m e 172 m). However, at 196 m, 223 m, 247 m, 274 m e 298 m height the change of the turbulence regime occurred at the same threshold wind speed. In contrast, at 316 m we evidenced only situations where the turbulence was weak. This pattern indicated that the structure and roughness of dense forest affect the turbulence structure.


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Author Biographies

Anne Cristiny Santos de Mendonça, National Institute of Amazonian Research

PhD student at the PPG in Climate and Environment, INPA/UEA, Brazil.

Authorship Contribution: Investigation; Data visualization (figures); Writing – original draft; Writing – review & editing.

Cléo Quaresma Dias Júnior, Federal Institute of Pará

Instituto Federal de Educação, Ciência e Tecnologia do Pará, Campus Belém, Brazil.

Authorship Contribution: Methodology; Supervision; Writing – review & editing.

Otavio Costa Acevedo, University of Oklahoma

The University of Oklahoma, Oklahoma, USA.

Authorship Contribution: Methodology; Supervision; Writing – review & editing.

Luca Mortarini, Institute of Atmospheric Sciences and Climate

Institute of Atmospheric Sciences and Climate (CNR-ISAC), Torino, Italy.

Authorship Contribution: Methodology; Supervision; Writing – review & editing.

Daniel Magnabosco Marra, Max Planck Institute of Biochemistry

Max Planck Institute for Biogeochemistry, Jena, Germany.

Authorship Contribution: Methodology; Supervision; Writing – review & editing.


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How to Cite

Mendonça, A. C. S. de, Dias Júnior, C. Q., Acevedo, O. C., Mortarini, L., & Marra, D. M. (2023). Turbulence regimes in the stable boundary layer above the Amazon Rainforest. Ciência E Natura, 45(esp. 2), e75412. https://doi.org/10.5902/2179460X75412

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