% WDNOTES: notes on estimating wave effects on wind measurements. % The following set of mfiles can be used to correct the wind speed % Ua measured at height za for the effects of the wave boundary layer % following the empirical model presented by Large, Morzel, and % Crawford (1995), J. Phys. Oceanog., 25, 2959-2971. In particular, % an analytic expression was found for the omega function (omegalmc.m) % shown in their Fig. 9b, which allows the 'true' wind speed (Ut10) % and stress at 10m (assumed above the wave boundary layer height) % to be computed using wavedist.m and the true wind speed (Uta) at the % measurement height za using wavedis1.m. The Large et al model assumes % neutral stability (reasonable for high winds and wave conditions) % and uses a 10-m neutral drag law (cdnve.m) based on Vera (1983; % unpublished manuscript). This drag law follows Large and Pond (1982) % for winds above 10 m/s but increases at lower wind speeds like % Smith (1987). The wave field is specified by the significant wave % height Hw. % % To compute 'true' wind speed Uta at za given Hw, use % Uta=wavedis1(Ua,za,Hw). % % To compute 'true' wind speed Ut at 10m given Hw, use % [Ut10,(Ut10-U10)]=wavedist(Ua,za,Hw). % % To plot the predicted effects of wave distortion on the wind Ua % measured at the height za for a range of significant wave heights % Hw=[0:2:8] in m, use % y=wavedis2(za). % % Subroutines called: % y=omegalmc(x) % cd10=cdnve(u10) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % 7/28/99: version 1.1 % 8/5/99: version 2.0 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%