Abstract
The structure of turbulence in an inversion layer and in an homogeneous convective field of the planetary boundary layer is described. In the first part of the paper, we validate the sodar estimates of turbulent dissipation, by using measurements with an hot-wire anemometric system in situ. Limitations of an ε measurement technique using structure function calculations are given, taking account of atmospheric properties and acoustic Doppler instrumental effects.
By comparison between isopleths of backscattering intensity and of turbulent dissipation rates, we observe that in the early morning, turbulence is advected by mechanical turbulence generated by wind shear. The same mechanism seems to be operating in the case of an inversion layer capping thermal instability, when the convective activity is not too greatly developed.
A turbulent kinetic energy budget is examined using aircraft, sodar, and tower measurements. This indicates a constant turbulent dissipation profile through a deep convective layer.
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MacAllister, C. G., Pollard, J. R., Mahoney, A. R., and Shaw, P. J. R.: Acousting Sounding. A New Approach to the Study of Atmospheric Structure. Proc. IEEE, 57–587.
Aubry, M., Chezlemas, R., and Spizzichino, A.: 1974, ‘Preliminary Results of the Atmospheric Acoustic Sounding at CNET’.Boundary-Layer Meteorol. 7, 513–419.
Brown, E. H.: 1974, ‘Turbulent Spectral Broadening of Backscatter Acoustic Pulse’.J. Acous. Soc. Amer. 56, 1398–1406.
Brown, E. H. and Hall, F. R. Jr.: 1978, ‘Advances in Atmospheric Acoustics’.Reviews of Geophysics and Space Physics 16, 47–110.
Deardoff, J. W. and Willis, G. E.: 1974, ‘The Computer and Laboratory Modelling of Nonbuoyant Particles in the Mixed Layer’.Adv. Geophys. 188, 187–200.
Estival, A. et Aubry, M.: 1975, ‘Simultaneous Observations of Atmospheric Structure by a Balloon Probe and a Doppler Sodar’, Third workshop in atmospheric acoustics, Toronto, Canada.
Gaynor, J. E.: 1977, ‘Acoustic Doppler Measurement of Atmospheric Boundary Layer Velocity Structure Functions and Energy Dissipation Rates’.J. Applied Meteorol. 16, 148–155.
Gaynor, J. E., Mandics, P. A., Wahr, A. B. and Hall, F. F., Jr.: 1976, ‘Studies of the Tropical Marine Boundary Layer Using Acousting Backscattering During Gate’, inPreprints of the 17th Radar Meteorology Conference, 303–306, American Meteorological Society, Boston, Mass.
Goutorbe, J. P.: 1977, ‘Bilan d’Énergie Turbulente dans la Couche Limite Planétaire’. Note EERM (Establissement d’Études et Recherches Méteorologiques) n° 300.
Hall, E. C., Hall, F. F., and Wescot, J. W.: 1974, ‘Acoustic Antennas for Atmospheric Echo Sounding’.J. Acous. Soc. Amer. 56, 1376–1383.
Kaimal, J. C., Wyngaard, J. C., Haugen, D. A., Coté, O. R., Izumi, Caughey, S. J., and Readings, C. J.: 1976, ‘Turbulence Structure in the Convective Boundary Layer’, J. Atm. Sci.33, 2125–2169.
Lenschow, D. H.: 1974, ‘Model of the Height Variation of the Turbulence Kinetic Energy Budget in the Unstable Boundary Layer’,J. Atmos. Sci. 31, 465–474.
Lumley, J. L. and Panofsky, H. A.: 1964,The Structure of Atmospheric Turbulence, John Wiley and Sons.
MacCready, P. B. Jr.: 1962, ‘The Inertial Subrange of Atmospheric Turbulence’.J. Geophys. Res. 67, p. 1051.
Pennel, W. T. and Lemone, M. A.: 1974, ‘An Experimental Study of Turbulence Structure in the Fair-weather Trade Wind Boundary Layer’,J. Atmos. Sci. 31, 1308–1323.
Neff, W. D.: 1975, ‘Quantitative Evaluation of Acoustic Echoes from the Planetary Boundary Layer’, Tech. Rep. ERL 322-WPL 38, Nat. Oceanic and Atmos. Admin., Boulder Colo.
Spizzichino, A.: 1974, ‘Discussion of the Operating Conditions of a Doppler Sodar’.J. Geophys. Res. 79, 5585–5591.
Spizzichino, A. et van Grunderbeeck, P: 1977, ‘Etude des Plumes Convectives de la Basse Atmosphere par Sondage Acoustique Doppler’. Annales de Géophysique33, 399–407.
Tatarski, V. I.: 1961,Wave Propagation in a Turbulent Medium (McGraw-Hill) New York.
Weill, A., Brandes, W. and Oberto, C.: 1976, ‘Anémomètre à Fil Chaud Embarquable Sur Ballon Captif’.J. Phys. 37, 173–175.
Weill, A. and Baudin, F.: 1976, ‘Atmospheric Turbulence as Observed byin situ Measurements and Doppler Sodar’. Paper presented to 92nd meeting of the Acoustical Society of America, San Diego, 16–19 November. Abstract inJ. Acous. Amer. 60, Suppl 1, 531.
Weill, A.: 1977, ‘Mesures des Caractèristiques de la Turbulence Dans la Couche Limite Atmosphèrique par Sondage Acoustique Doppler’. Proceeding, Colloque de l’Union Radio Scientifique Internationale, 27–29; La Baule (France).
Wyngaard, J. C. and Coté, O. R.: 1971, ‘The Budgets of Turbulent Kinetic Energy and Temperature Variance in the Atmospheric Surface Layer’,J. Atmos. Sci. 28, 190–201.
Wyngaard, J. C.: 1972, inWorkshop on micrometeorology on surface layer turbulence, (101–149). Haugen, D. A. (Ed.) (American Meteorological Society, Boston, Mass.).
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Weill, A., Baudin, F., Goutorbe, J.P. et al. Turbulence structure in temperature inversions and in convection fields as observed by doppler sodar. Boundary-Layer Meteorol 15, 375–390 (1978). https://doi.org/10.1007/BF02652609
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DOI: https://doi.org/10.1007/BF02652609