Imprint of thawing permafrost on winter flow in southern Siberia ...

• Main Authors: Han, Li, Park, Hotaek, Menzel, Lucas
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Winter River; permafrost; Siberia
• Online Access: https://dx.doi.org/10.57757/iugg23-2378; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018389

<!--!introduction!--> In the permafrost domain, hydrological processes are expected to be altered by warming-induced permafrost degradation, mainly through changing the connections between surface and subsurface systems. However, due to the lack of groundwater observations in the permafrost domain, key processes that control subsurface dynamics are not well understood. Nevertheless, as a consequence of frozen ground during the cold season, the winter river discharge is only recharged by groundwater and thus can reflect the changes in groundwater dynamics. In this contribution, we investigate the magnitude and timing of the occurrence of miniflow, as well as their relations to the corresponding groundwater dynamics during 1950-2010 in large river catchments (with various permafrost coverages) in southern Siberia. Based on daily discharge records, we found that the lowflow in all the catchments increased during 1950-2010, with the most considerable rise being noticed since 1980. Particularly, in the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...