State Key Laboratory Of Estuarine and Coastal Research, Institute of EStuarine and Coastal Research, East China Normal University, Shanghai 200062, China
2.
Laboratory of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003, China
Based on the definition and concept introduced in this paper,the theoretical expression of surface slope bispectrum for two-dimensional random waves is derived.Furthermore,the skewness of surface elevation distribution and that of surface she distribution are respectively employed to define the up-down and front-back asymmetry of a waves hape so that the relations between bispectrum and skewness are proposed.Through these relations,the updown end front-back asymmetry of the wave shape can be quantitatively determined by means of the bispectral analyses of observed wave data.
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