Ice gouging conditions of the Northern Caspian depending on the severity of winters

Maznev, S.; Magaeva, A.; Ogorodov, S.; Yaitskaya, N.

Авторы: Maznev S., Magaeva A., Ogorodov S., Yaitskaya N.
Сборник: Proceedings of the 25th International Symposium on Ice. International Association for Hydro-Environment Engineering and Research (IAHR)
Год издания: 2020
Место издания: Trondheim, Norway
Первая страница: 935
Последняя страница: 943
Аннотация: Ice gouging is mechanical plowing of bottom ground by ice features. Hydrometeorologicalconditions, changing from year to year, determine the intensity of ice features (icehummocks, ice ridges and stamukhi) formation. In this paper, we consider the conditions ofthe ice gouging of the Northern Caspian seabed by ice features in winters of various severity.We used the cumulative freezing-degree days (CFDD) over a winter period as a criterion fordividing winters by severity. We used data from several nearshore meteorological stations todivide them into mild, moderate and severe. The analysis, based on aerial reconnaissance andmodern satellite data, showed the variability of the number of stamukhi, their distribution anddepths of grounding over recent years. We created charts of different ice gouging intensitiesfor the different types of winters. The charts are consider not only analysis of stamukhidistribution, but also ice cover dynamics, typical position of fast ice rim and features of thebottom topography. The charts showed changes in the conditions of ice gouging at theNorthern Caspian from year to year. The results allowed estimating the influence of thewinters severity on the intensity of the ice features formation and ice gouging in differentyears. The results of this study must be considered when conducting economic activities inthe Northern Caspian.
Добавил в систему: Мазнев Степан Валерьевич

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