Low-level jet and turbulence production: a case study for the Pantanal





Pantanal, Nocturnal boundary layer, Low-level Jet


The aim of this research was to evaluate the temporal evolution of the turbulent kinetic energy over the effect of Low Level Jets in the Pantanal Night Boundary Layer through the sensible heat flux and momentum flux. The methodology employed was a case study for the night between September 19th and 20th, 1999, during the dry season in the region. This night is rich in diverse phenomena with two LLJ events, a gravity wave, a convective instability and burning in the region. The sensible heat and momentum fluxes, friction velocity and turbulent kinetic energy were calculated using 5 minute moving. We observed that in the early evening, with higher turbulent activity the effects on the fluxes, turbulent kinetic energy and friction velocity are more pronounced. As turbulence suppression increases the upside-down wind shear promoted by the Jet has negligible impact at the surface. In conclusion, the effect of the Jet will be depending on its relationship with suppression of turbulent activity promoted by the stable layer.


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Author Biographies

Marcos Mateus Rodrigues Silva, Federal Institute of Pará

Department of Physics

Camila Tassiane Silva Martins Pinho, Federal Institute of Pará

Department of Physics

Hardiney dos Santos Martins, Federal Institute of Pará

He holds a full degree in Physics from the Federal Center for Technological Education of Pará (2004), a master's degree in Physics from the Federal University of Pará (2007) and a PhD in Physics from the Federal University of Santa Maria (2011). He is currently a professor of basic, technical and technological education at the Federal Institute of Education, Science and Technology of Pará. He has experience in the area of ​​Physics, with an emphasis on Condensed Matter Physics and Planetary Boundary Layer Physics, working mainly on the following topics: turbulence atmospheric, time series, Night Boundary Layer, Pantanal, wavelet, gravity waves and low-level jets.

Cléo Quaresma Dias Junior, Federal Institute of Pará

Department of Physics


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How to Cite

Silva, M. M. R., Pinho, C. T. S. M., Martins, H. dos S., & Dias Junior, C. Q. (2023). Low-level jet and turbulence production: a case study for the Pantanal. Ciência E Natura, 45(esp. 2), e83674. https://doi.org/10.5902/2179460X83674

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