Spatial and temporal variability of snow cover in the southern forest-steppe of the Upper Ob River

• Main Authors: N. Bykov I., D. Chernykh V., D. Pershin K., R. Biryukov Yu., L. Lubenets F., D. Zolotov V., Н. Быков И., Д. Черных В., Д. Першин К., Р. Бирюков Ю., Л. Лубенец Ф., Д. Золотов В.
• Other Authors: The work carried out within the framework of the state assignment of the Institute of Water and Environmental Problems of the Siberian Branch of the Russian Academy of Sciences RAS № 0306-2021-0007 «Natural and natural-economic systems of Siberia in the context of modern challenges: diagnostics of conditions, adaptive capabilities, potential of ecosystem services». Computations for the Kasmala catchment were made using the snow observation database created under RFBR project № 19-35-60006., Работа выполнена в рамках Государственного задания Института водных и эколо гических проблем СО РАН № 0306-2021-0007 «Природные и природно-хозяйственные системы Сибири в условиях современных вызовов: диагностика состояний, адаптивные возможности, потенциал экосистемных услуг» . Расчёты по бассейну Касмалы проведены с использованием базы данных снегомерных наблюдений, сформированной в рамках проекта РФФИ № 19-35-60006.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: IGRAS 2022
• Subjects: Upper Ob;southern forest-steppe;setting-up dates;destruction;stable snow cover duration;thickness and water content of snow cover; Верхнеобская провинция;южная степь;даты установления;разрушения и продолжительности устойчивого снежного покрова;толщина снега и снегозапасы; ob river
• Online Access: https://ice-snow.igras.ru/jour/article/view/1029; https://doi.org/10.31857/S2076673422030136

The study area is the forest-steppe in the Upper Ob basin located on the south of the West Siberian Plain. The results of studies of the dates of setting-up and loss of a stable snow cover and its duration are presented, the thickness of snow and snow storages for the period of maximum snow accumulation are analyzed. We used observational data obtained on routes and meteorological sites in 1966–2018 together with our own snow measurements of 2011–2019. It was found that in the southern forest-steppe, the duration of the stable snow cover presence decreases mainly as a result of its earlier destruction. At the same time, on the routes in a «field» the thickness of snow and snow storage increase due to growth of winter precipitation. But no such trend is observed on the routes in a «forest» which is explained by influence of its canopy density. The snow cover here is unevenly distributed over the territory because the driſted snow transport depends mainly on features of the vegetation cover and the terrain relief. The route snow surveys performed near weather stations do not reflect the entire landscape diversity of the territory. Проанализированы особенности сезонного снегонакопления за многолетний период. Установлены тенденции изменений характеристик снежного покрова с середины 1960-х годов и его пространственное распределение в зависимости от ландшафтов в пределах южной лесостепи Верхней Оби. Использованы данные государственных гидрометеостанций и собственных снегомерных работ 2011–2019 гг.