A mesoscale shear convective cell observed during the C.O.A.S.T. experiment: Acoustic sounder measurements |
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| Authors: | A. Weill F. Baudin C. Mazaudier G. Desbraux C. Klapisz A. G. M. Driedonks J. P. Goutorbe A. Druilhet P. Durand |
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| Affiliation: | (1) C.R.P.E., 38/40 rue du général Leclerc, 92131 Issy-Les-Moulineaux, France;(2) K.N.M.I., De Bilt, The Netherland;(3) C.N.R.M., Avenue Coriolis, 31057 Toulouse, France;(4) Université Paul Sabatier, Laboratoire d'Aérologie, 31057 Toulouse, France |
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| Abstract: | A mesoscale shear convective cell was observed with a Doppler sodar and a minisodar on May 22, 1983 near the Netherland Coast. Boundary-layer modifications associated with fair weather precipitating clouds were observed and a separation is undertaken between the different scales of the perturbations. There is difficulty in estimating the turbulent dissipation rate by the inertial method in the presence of mesoscale perturbations, which suggests the need for independent computation of spatial structure functions of velocity fluctuations and spectral density of velocity fluctuations as functions of frequency to observe the relationship between wave lengths and frequencies.C.O.A.S.T.: Cooperative Experiment with Acoustic Sounding Techniques. |
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