In situ formation of the stable sea foam and its transport

In this paper, it is treated that the features of formation and transport and physical properties of the curious extraordinary stable sea foam produced along the Japan seashore during prevailing seasonal wind. Such phenomena often occured at the Pacific coastal lines of Japan on the season of the typhoon and high winds. Then the Fukura shore, Yamagata Pref., is selected as the representative station for observations. Moreover, the above analysis is performed by making use of the Foaming Factor, a certain physical quantity, which has been previously introduced by one of the authors (Abe) in order to evaluate the degree of a production of whitecap on a crest of wave and then has been used in a watermass analysis in a slick area with fairly good sucsess. It is attributed to stabilization of sea foam due to surface active substances extracted from coastal phytoplankton (mainly a certain type of diatom), sea weed, etc. when the water is disturbed violently by wind and wave action.