Vertical profiles of the turbulent velocity spectra for a 140 m micrometeorological tower

Otávio Costa Acevedo, Pablo Eli Soares de Oliveira, Claudio Alberto Teichrieb, Franciano Scremin Puhales, Luis Gustavo Nogueira Martins, Gervásio Annes Degrazia, Samuel Martins Silva, Rafael Maroneze


Multiresolution spectra of both horizontal and vertical wind components observed at a 140-m micrometeorological tower are analysed. The tower is located at the township of Linhares, ES, Brazil, at 4 km from the coast and nest to a thermal power plant. At nighttime, the spectral maximum is located at the largest temporal scales analyzed, being therefore related to nonturbulent low-frequency processes. During the day, spectral maxima of the horizontal wind components show little variation above 20 m.
For the vertical component, on the other hand, the temporal scale of such maxima increases steadily with height.


Multiresotution spectra; Spectral máxima; Turbulent kinetic energy


ACEVEDO, O. C.; COSTA, F. D.; OLIVEIRA, P. E. S.; PUHALES, F. S.; DEGRAZIA, G. A., ROBERTI, D. R. The Influence of Submeso Processes on Stable Boundary Layer Similarity Relationships. Journal of the Atmospheric Sciences, v. 71, p. 207-225, 2014.

ACEVEDO, O. C.; DEGRAZIA, G. A.; PUHALES, F. S.; MARTINS, L. G. N.; OLIVEIRA, P. E. S.; TEICHRIEB, C. A.; SILVA, S. M.; MARONEZE, R.; BODMANN, B.; MORTARINI, L.; CAVA, D.; ANFOSSI, D. Monitorind the micrometeorology of a coastal site next to a termal power plant from the surfasse to 140 m. Bulletin of the American Meteorological Society, submetido.

CAMPOS, J. G.; ACEVEDO, O. C.; TOTA J.; MANZI, A. O. On the temporal scale of the turbulent Exchange of carbon dioxide and energy above a tropical rain forest in Amazonia. Journal of Geophysical Research – Atmospheres, v. 114, D08124, 2009.

DEGRAZIA, G. A.; ANFOSSI, D.; CARVALHO, J. C.; MANGIA, C.; TIRABASSI, T.; CAMPOS VELHO, H. F. turbulence parameterisation for PBL dispersion models in all stability conditions. Atmospheric Environment, v. 34, p. 3575-3583, 2000.

HAUGEN, D. A.; KAIMAL, J. C.; BRADLEY, E. F. An experimental study of Reynolds stress and heat flux in the atmospheric surface layer. Quarterly Journal of the Royal Meteorological Society, v. 97, p. 168-180, 1971.

HOJSTRUP, J. A simple model for the adjustment of velocity spectra in unstable conditions downstream of an abrupt change in roughness and heat flux. Boundary-Layer Meteorology, v. 21, p. 341-356, 1981.

Howell, J. F.; Mahrt, L. Multiresolution flux decomposition. Boundary-Layer Meteorology, v. 83, p. 117-137, 1997.

KAIMAL, J. C.; WYNGAARD, J. C.; IZUMI, Y.; COTÉ, O. R. Spectral characteristics of the surface-layer turbulence. Quarterly Journal of the Royal Meteorological Society, v. 98, p. 563-589, 1972.

MALLAT, S. A theory for multiresolution signal decomposition: The wavelet representation. IEEE Transactions on Pattern Analysis and Machine Intelligence, v. 11(7), p. 674-693, 1989.

PANOFSKY, H. A.; DUTTON, J. A. Atmospheric Turbulence – Models and Methods for Engineering Applications, 1984, 397 pp.

VICKERS, D.; Mahrt, L. A solution for flux contamination by mesoscale motions with very weak turbulence. Boundary-Layer Meteorology, v. 118, p. 431-447, 2005.


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