3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-287-C5-290
Estimation of the atmospheric surface momentum and heat fluxes using a high resolution acoustic radarC.G. HELMIS, J.A. KALOGIROS, K.H. PAPADOPOULOS, A.T. SOILEMES and D.N. ASIMAKOPOULOS
Department of Applied Physics, University of Athens, 33 Ippokratus Str., 10680 Athens, Greece
The surface heat flux (Qo) and the friction velocity (u*) are important parameters of the Atmospheric Boundary Layer (ABL). Vertical velocity variance (σw)2 profiles have been used to estimate the parameters Qo and u* from Acoustic Sounder (AS) data according to the similarity theory. A comparison was made using data from a 12 m high mast equipped with humidity, and fast responding wind and temperature sensors and a high resolution monostatic AS. The comparison confirms the ability of the (σw)2 profile method to provide, even in a noisy environment (inhabitant area), estimates of these parameters with reasonable accuracy and on a continuous basis. The requirements for the method to be applied is that convective conditions or a minimum mechanical mixing exist and the level of acoustic noise is not too high.
© EDP Sciences 1994