the wind and wave directions. However, currents were not measured at 

 the time of wave recording but rather by analyzing current measurements 

 for the same windspeed taken on other occasions. 



There is a discussion of the high-frequency characteristics of the 

 wind-wave spectrum based on Phillips (1966) discussion. The major point 

 of the paper is that the equilibrium form of the spectrum is modified by 

 currents . 



The measurements for 0.15 to 1.2 hertz show considerable deviation 

 from Phillips' equilibrium form. There is no real attempt to discuss 

 experiments and theory, and it is suggested that the large deviation in 

 shallow depths is due to unrecorded swell. 



Coastal Engineering Significance . This paper indicates that the 

 importance of wave-current interaction is recognized in the Soviet 

 Union. It is included as a starting point for someone interested in 

 Russian work on the subject. 



16. GARRETT, C, and SMITH, J., "Interaction Between Long and Short 

 Surface Waves," Journal of Physical Oceanography, Vol. 6, No. 6, 

 Nov. 1976, pp. 925-930. 



Keywords. Interactions, Short Wave-Long Wave; Radiation Stress; Theory; 

 Waves, Wind. 



Discussion. The effect of long waves on short waves riding over them is 

 discussed theoretically. This topic has been treated extensively by 

 other authors, yet this paper includes another possibly significant 



effect . 



The basic mathematics of the problem is first described, since it 

 is much easier to formulate, in the linear approximation, using wave 

 action conservation which was not used in earlier work. The various 

 interaction terms are identified and their order of magnitude is 

 ascertained . 



It is suggested that when the wind is actively generating short 

 waves, the work done on the long waves by such transfer of momentum is a 

 dominant term in the energy equation for long waves. 



Coastal Engineering Significance . The authors conclude that the 

 mechanism they describe contributes a significant part of long wave 

 momentum. Thus, this paper is potentially significant in understanding 

 the development of wind wave spectra. 



This paper is representative of a whole series of papers on short 

 wave-long wave interaction. The various means of momentum transfer 

 could also be relevant in other wave-current interactions, especially 

 for wave-generated currents. 



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