AIR-ICE-OCEAN MOMENTUM EXCHANGE .2. ICE DRIFT

A model was constructed to estimate ice flee trajectories. The model c onsiders the balance of atmosphere and ocean drag forces on ice flees, including skin acid body drag forces from wind, waves, and currents. Discussion of air-ice and water-ice skin stresses, water-ice form stre ss, and wave radiation stress is presented. Estimates are presented fo r the ice drift in a variety of hypothetical situations: (i) as a func tion of ice flee diameter, thickness, and concentration; (ii) in ''wav e'' and ''no wave'' situations; and (iii) in constant wind forcing and time-varying wind forcing situations. The model is-shown to be consis tent with wave and ice observations collected during the Labrador Ice Margin Experiment 1987 on the Grand Banks during relatively high wind situations. Combining this model with the wave-scattering model of Par t I allows estimation of 1) the effect of wave scattering attenuation on ice flee trajectories and the ice edge and 2) the effect of ice flo e drift on the wave spectra. Thus, an enhanced modeling of wave and ic e dynamics is achieved.