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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Coherent structures detected in the unstable atmospheric surface layer above the Amazon forest

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Autor(es):
Dias Junior, C. Q. [1] ; Sa, L. D. A. [2] ; Pacheco, V. B. [3] ; de Souza, C. M. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] INPA, Manaus, Amazonas - Brazil
[2] INPE, CRA, Belem, Para - Brazil
[3] Univ Fed Amazonas, Manaus, Amazonas - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS; v. 115, p. 1-8, APR 2013.
Citações Web of Science: 10
Resumo

Some characteristics of the turbulence structure above primary forest localized in the south-western Amazon are analyzed. The data was collected in 60 m height meteorological tower erected in Rebio-Jaru Reserve, Brazil. The Morlet's wavelet is used to detect coherent structures (CS) ``ramp{''} time scales from turbulent virtual temperature data measured above forest, under day-time conditions. It is shown that there is a close relationship between time scale of the coherent structure (TCS) and the height to the inflection point in the mean wind speed profile (IP). A time scale associated with the IP is used to provide useful information on inside canopy penetration flow in order to be compared with the CS time-scale. The results show a very robust correlation between these two time scales (for 144 half-hourly data sets, a correlation coefficient value of 0.9 have been obtained). Such results provide new insights regarding shear instability and turbulent eddy characteristics above tall vegetation, in the surface roughness sub-layer (SRS). (c) 2013 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 01/06908-7 - Interações entre radiação, nuvens e clima na Amazônia na transição entre as estações seca e chuvosa/LBA
Beneficiário:Maria Assunção Faus da Silva Dias
Linha de fomento: Auxílio à Pesquisa - Temático