hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.59887/fpg/5g5t-4mzd-94abhydrophysics-676Research ArticleФУНДАМЕНТАЛЬНЫЕ ВОПРОСЫ ГИДРОФИЗИКИFUNDAMENTAL ISSUES OF HYDROPHYSICSОценка времени жизни «барашка» обрушивающейся волныEstimation of the “whitecap” lifetime of breaking waveКориненкоА. Е.KorinenkoA. E.

299011, Капитанская ул., 2, г. Севастополь

299011, Kapitanskaya Str., 2, Sevastopol

korinenko.alex@mhi-ras.ruМалиновскийВ. В.MalinovskyV. V.

299011, Капитанская ул., 2, г. Севастополь

299011, Kapitanskaya Str., 2, Sevastopol

ДуловВ. А.DulovV. A.

299011, Капитанская ул., 2, г. Севастополь

299011, Kapitanskaya Str., 2, Sevastopol

КудрявцевВ. Н.KudryavtsevV. N.

299011, Капитанская ул., 2, г. Севастополь; 195196, Малоохтинский пр., д. 98, г. Санкт-Петербург

299011, Kapitanskaya Str., 2, Sevastopol; 195196, Malookhtinsky Pr., 98, St. Petersburg

Морской гидрофизический институт, РАНРоссияMarine Hydrophysical Institute, Russian Academy of SciencesRussian FederationМорской гидрофизический институт, РАН; Российский государственный гидрометеорологический университетРоссияMarine Hydrophysical Institute, Russian Academy of Sciences; Russian State Hydrometeorological UniversityRussian Federation2022010420221516172Copyright © Кориненко А.Е., Малиновский В.В., Дулов В.А., Кудрявцев В.Н., 20222022Кориненко А.Е., Малиновский В.В., Дулов В.А., Кудрявцев В.Н.Korinenko A.E., Malinovsky V.V., Dulov V.A., Kudryavtsev V.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/676

Представлены результаты исследования времени жизни обрушений ветровых волн (барашков) и пространственного распределения моментов зарождения обрушений по профилю длинной поверхностной волны, полученные в ходе специализированных экспериментов с океанографической платформы в Черном море. Регистрация барашков осуществлялась по видеозаписям морской поверхности. Одновременно с видеозаписями измерялись характеристики поверхностного волнения, а также регистрировалась метеорологическая информация. Показано, что распределение времени жизни барашка хорошо описывается экспоненциальным законом. Установлено, что отношение времени жизни индивидуального барашка к периоду обрушивающейся волны равно 0,3, а распределения этого отношения подобны для различных ветровых и волновых условий. Показано, что зарождение барашков происходит преимущественно в районе гребня длинной волны со смещением на ее передний склон в среднем на 9,6° фазы длинной волны. Возникнув на переднем фронте, барашек за время жизни смещается на задний фронт длинной волны, так что разность фаз между зарождением обрушения и максимумом доли поверхности, занятой барашками, составляет 21,6°.

The paper presents the results of a study of the lifetime of wind-wave breaking (“whitecaps”) and the spatial distribution of the moments of wave-breaking initiation along the profile of a long surface wave. The results obtained during the specialized experiments from an oceanographic platform in the Black Sea are given. The registration of the whitecaps was carried out based on the video recordings of the sea surface. The surface waves’ characteristics were measured and the meteorological information was recorded simultaneously with the video recordings. It is shown that the distribution of the whitecaps’ lifetime is well described by an exponential law. It was found that the ratio of the lifetime of an individual whitecap to the period of the breaking wave is 0.3. The distributions of the above-mentioned ratio are similar for different wind and wave conditions. It is indicated that the generation of whitecaps occurs mainly in the region of the crest of a long wave with a shift to its front slope on average by 9.6 of the phase of the long wave. The whitecap having arisen at the leading edge shifts to the trailing edge of the long wave during its lifetime, so that the phase difference between the breaking initiation and the maximum of the surface fraction covered by the whitecaps equals 21.6.

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The authors declare that there are no conflicts of interest present.