Analysis of the vertical wind profile at the Alcântara Launch Center using Principal Components Analysis
Keywords:Maritime breeze, Low level jets, Principal component analysis
AbstractThe objective of this study is to perform a vertical wind profile analysis using radiosonde data at the Alcântara Launch Center (ALC), using the multivariate statistical technique of the Principal Components Analysis (PCA), to verify if there is a presence of flows in the vertical wind profile. These flows may characterize local circulations and be associated with sea breeze-type circulations, and may also be associated with synoptic mesoscale level circulations, such as Low-Level Jets (LLJ). The results showed that in the first three components in the nocturnal period there is a presence of LLJ, with 85% of the variance explained. The occurrence of LLJ presented typical heights in the components, the first one with a height of 800 meters (average direction 60 to 70 degrees), the second with a height of 400 meters (mean direction 40 to 50 degrees) and the third with 200 meters average 50 to 60 degrees). These LLJs may be associated with processes related to the Planetary Boundary Layer (PBL) at night, such as maximum wind inversion and breezes.
BONNER, W. D.; ESBENSEN, S.; GREENBERG, R. Kinematics of the low-level jet. Journal of Applied Meteorology, v. 7, n. 3, p. 339-347, 1968.
CORRÊA, C. S.; CLARKE, R. T.; SILVEIRA, A. L. L. Estudo da ocorrência de Fluxos no perfil vertical do vento na baixa Atmosfera com Análise das Componentes Principais (ACP) e a sua relação com a precipitação no Rio Grande do Sul. Revista Brasileira de Meteorologia, v.22, n.1, 121-127, 2007.
CORRÊA, C. S.; DALLAROSA, R. L. G.; DEGRAZIA, G. A. Estudo Observacional dos Jatos de Nível Baixo Sobre a Região Metropolitana de Porto Alegre. Revista Brasileira de Recursos Hídricos, Volume 6 n.4, 19-27, 2001.
DOUBLER, D. L. et al. An NARR-Derived Climatology of Southerly and Northerly Low-Level Jets over North America and Coastal Environs. Journal of Applied Meteorology and Climatology, v. 54, n. 7, p. 1596-1619, 2015.
FERREIRA, S. H. S.; CALBETE, N. O. Estudo de caso de jatos de baixos níveis na América do sul ocorridos em 1999. In: 12 CONGRESSO BRASILEIRO DE METEOROLOGIA. Foz do Iguaçú: SBMET, 2002.
GISLER, C. A. F.; FISCH, G.; CORRÊA, C. S. Statistical analysis of wind profile in the surface layer at the Alcântara launching center. Journal of Aerospace Technology and Management, v. 3, n. 2, p. 193-202, 2011.
LIU, S.; LIANG, X. Observed diurnal cycle climatology of planetary boundary layer height. Journal of Climate, v. 23, n. 21, p. 5790-5809, 2010.
MARENGO, J. A.; SOARES, W. R. Episódios de Jatos de Baixos Níveis ao Leste dos Andes durante 13-19 de abril de 1999. Revista Brasileira de Meteorologia, v. 17, n. 1, p. 35-52, 2002.
NETO, J. M. M.; MOITA, G. C. Uma introdução à análise exploratória de dados multivariados. Química nova, v. 21, n. 4, p. 467-469, 1998.
PEREIRA, E. I. et al. Atlas Climatológico do Centro de Lançamento de Alcântara-MA. São José dos Campos: CTA/IAE-Divisão de Ciências Atmosféricas, 2002.
PU, B.; DICKINSON, R. E. Diurnal spatial variability of Great Plains summer precipitation related to the dynamics of the low-level jet. Journal of the Atmospheric Sciences, v. 71, n. 5, p. 1807-1817, 2014.
ROBALLO, S. T.; FISCH, G. Escoamento atmosférico no Centro de Lançamento de Alcântara (CLA): parte I-aspectos observacionais. Revista Brasileira de Meteorologia, v. 23, n. 4, p. 510-519, 2008.
SOUZA, D. C.; OYAMA, M. D. Breeze Potential Along the Brazilian Northern and Northeastern Coast. Journal of Aerospace Technology and Management, v. 9, n. 3, p. 368-378, 2017.
STENSRUD, D. J. Importance of low-level jets to climate: A review. Journal of Climate, v. 9, n. 8, p. 1698-1711, 1996.
WHITEMAN, C. D.; BIAN, X.; ZHONG, S. Low-level jet climatology from enhanced rawinsonde observations at a site in the southern Great Plains. Journal of Applied Meteorology, v. 36, n. 10, p. 1363-1376, 1997.
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