Low-level jet and turbulence production: a case study for the Pantanal
DOI:
https://doi.org/10.5902/2179460X83674Keywords:
Pantanal, Nocturnal boundary layer, Low-level JetAbstract
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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ACEVEDO, O.; FITZJARRALD, D. The early evening surface-layer transition: temporal and spatial variability. Journal of the Atmospheric Sciences, v. 58, p. 2650–2667, 2001.
ANDRADE, E. S. de. Na estrutura da camada limite estável acima do Pantanal Matogrossense. 2003. 206 f. Dissertação (Mestrado em Meteorologia) — Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 2003.
BAAS, P.; BOSVELD, F. C.; BALTINK, H. K.; HOLTSLAG, A. A. M. A climatology of nocturnal low-level jets at cabauw. Journal of Applied Meteorology and Climatology, v. 48, p. 1627–1642, 2009.
CORREA, P. B.; DIAS-JUNIOR, C. Q.; CAVA, D.; SORGEL, M.; BOTIA, S.; ACEVEDO, O.; OLIVEIRA, P. E.; MANZI, A. O.; MACHADO, L. A. T.; MARTINS, H. d. S.; TSOKANKUNKU, A.; ARAUJO, A. C.; LAVRIC, J. V.; WALTER, D. W.; MORTARINI, L. A case study of a gravity wave induced by amazon forest orography and low level jet generation. Agricultural and Forest Meteorology, v. 307, p. 108457, 2021.
MARQUES-FILHO, E. P.; Sá, L. D. d. A.; KARAM, H.; ALVALA, R.; SOUZA, A.; PEREIRA, M. Atmospheric surface layer characteristics of turbulence above the pantanal wetland regarding the similarity theory. Agricultural and Forest Meteorology, v. 148, p. 883–892, 2008.
MARTANO, P.; MARQUES-FILHO, E. P.; Sá, L. D. D. A. Land-atmosphere transfer parameters in the brazilian pantanal during the dry season. Atmosphere, v. 6(6), p. 805–821, 2015.
MARTINS, H. S.; Sá, L. D. d. A.; MORAES, O. L. L. Low level jets in the pantanal wetland nocturnal boundary layer – case studies. American Journal of Environmental Engineering,
v. 3(1), p. 32–47, 2013.
MENDES-JUNIOR, O.; DOMINGUES, M. O.; CHAN, C. S.; ALVALá, R. C. d. S.; Sá, L. D. d. A.;MANZI,
A. O.; SOUZA, A. d. Análise do tempo local durante o experimento ipe 2: Abordagem observacional preliminar. In: XI CONGRESSO BRASILEIRO DE METEOROLOGIA, 19., 2000, Rio de Janeiro. Anais do XI Congresso Brasileiro de Meteorologia. [S.l.]: Sociedade Brasileira de Meteorologia, 2000.
POULOS, G.; BLUMEN, W.; FRITTS, D.; LUNDQUIST, J.; SUN, J.; BURNS, S.; NAPPO, C.; BANTA, R.; NEWSOM, R.; CUXART, J.; TERRADELLAS, E.; BALSLEY, B.; JENSEN, M. Cases-99: A comprehensive investigation of the stable nocturnal boundary layer. Bulletin of American
Meteorological Society, v. 83, p. 555–581, 2002.
SANCHEZ, M. P.; OLIVEIRA, A. P. d.; VARONA, R. P.; TITO, J. V.; CODATO, G.; YNOUE, R. Y. Y.; RIBEIRO, F. N. D.; MARQUES-FILHO, E. P.; SILVEIRA,: L. C. d. Observational investigation of the low-level jets in the metropolitan region of São Paulo, Brazil. Earth and Space Science, v. 9, p. e2021EA002190., 2022.
STULL, R. An introduction to boundary layer meteorology. Dordrecht: Kluwer Academic Publishers, 1988. 666 p.
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