The water level regime of periglacial lakes during the growth stage (the lakes of the Tavan-Bogdo-Ola mountain massif, South-Eastern Altai)

• Published in: Animal Behaviour
• Main Authors: V. Rasputina A., G. Pryakhina V., D. Ganyushkin A., D. Bantcev V., N. Paniutin A., В. Распутина А., Г. Пряхина В., Д. Ганюшкин А., Д. Банцев В., Н. Панютин А.
• Other Authors: The authors are grateful to their colleagues E.S. Derkach, S.A. Griga and K.A. Ibraev for assistance in organizing and conducting field hydrological research. This research was funded by the Russian Foundation for Basic Research (RFBR), grant number № 19–05–00535 A «Natural catastrophes and transformation of the landscapes of the southeastern Altai and northwestern Mongolia in the period from the maximum of the last glaciation»., Авторы благодарят своих коллег Е.С. Деркач, С.А. Григу и К.А. Ибраева за помощь в организации и проведении полевых гидрологических работ. Работа выполнена при поддержке гранта РФФИ № 19–05–00535 А «Природные катастрофы и трансформация ландшафтов юго-восточного Алтая и северо-западной Монголии в период с максимума оледенения».
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: IGRAS 2022
• Subjects: glacier lakes;moraine lakes;formation of lakes;Altay; приледниковые озёра;моренные озёра;формирование озёр;Алтай; Kol’; New Lakes; The Cryosphere
• Online Access: https://ice-snow.igras.ru/jour/article/view/1037; https://doi.org/10.31857/S2076673422030143

Assessment of the dynamics of high-altitude glacial lakes is becoming increasingly important in the context of modern climate instability. The formation of new periglacial lakes and the growth of existing lakes as a result of the reduction of glaciers are recorded almost all over the world, including Russia. A rapid increase of a periglacial lake size may lead to the formation of an outburst flood. In this context, in order to prevent outburst floods, it is necessary to investigate outburst hazard lakes at all stages of their development. The periglacial lakes of the Altai mountains have been little-studied in comparison with other mountainous areas. At the same time, they are also characterized by the formation of new lakes during the period of climate nonstationarity. It was confirmed by the identified statistically significant trends in average monthly air temperatures during the ablation period. Based on the analysis of multi-temporal satellite images, it was found that the number of new periglacial lakes in the high-altitude territories of the Altai Republic (Katunsky ridge, North-Chuya ridge, South-Chuya ridge and the Tavan-Bogdo-Ola mountain massif) is increasing exponentially. For a more detailed survey and field hydrological studies, the authors chose the recently formed periglacial Lake Barsovo and periglacial Lake Gachi-Kol. Both lakes located within the northen slope of the Tavan-Bogdo-Ola mountain massif. Field observations, which were carried out in July-August 2021, have shown that both lakes are currently at the transgressive stage of development (growth stage). The transgressive phase of the lakes development is characterized by a rapid increase in size by the end of the warm period and a complex level regime on both diurnal and annual scales, due to the fact that both lakes are adjacent to the glacier. На основе анализа изменчивости гидролого-морфометрических характеристик озёр с применением спутниковых изображений и данных полевых гидрологических наблюдений, выполненных авторами в июле – августе ...