Wave grouping characteristics in nearshore Great Lakes II

✍ Scribed by Paul C. Liu; Nathan Hawley

• Book ID: 104158924
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 927 KB
• Volume: 29
• Category: Article
• ISSN: 0029-8018
• DOI: 10.1016/s0029-8018(01)00079-8

✦ Synopsis

This is a sequel with extensive new data to Liu's (Liu, 2000a. Wave grouping characteristics in nearshore Great Lakes. Ocean Engineering 27, 1221-1230) exploratory study on wave grouping characteristics in the nearshore Great Lakes. We analyze recent GLERL time-series measurements recorded by pressure sensors deployed at four nearshore stations in southern Lake Michigan during 1998-1999. With the advantage of continued application of time-frequency wavelet spectrum analysis, the extensive new measurements substantially confirmed the effectiveness of the empirical characterization of wave grouping parameters defined in Liu. We show that a wave group is really the basic element for a detailed understanding of wave processes, in contrast to the conventional approach of using a frequency spectrum as the basic element, which depends on the recording length and requires the data to be stationary. While studying wave time-series alone does not really alleviate the vast intricacies of the wind wave processes, the embodiment of wave grouping as the predominant feature in the wind wave processes clearly represents a significant step forward toward sound conceptual advancement.