Implications of Yedoma bank outcrops on the polar’s river sediment transport ...

• Main Authors: Chalov, Sergey, Habel, Michał, Moreido, Vsevolod, Prokopeva, Kristina
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic; Arctic Ocean; Kolyma; Indigirka; Yar; Ice; kolyma river; permafrost
• Online Access: https://dx.doi.org/10.57757/iugg23-2337; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018420

<!--!introduction!--> The erosion of permafrost outcrops (yedoma) in the valleys of large Arctic rivers is considered as an important source of suspended sediment and carbon inflow into the natural waters of the Lena, Kolyma, Yana, Indigirka Rivers and further into the Arctic Ocean. Based on combination of on-situ sediment transport observations done in 2021 and 2022 (reconnaissance, ADCP measurements, laser optics LISST profiles), application of remote sensing data and 2D hydrodynamic and morphological modelling by MIKE 21C, we explored the impact of Duvanny Yar Yedoma ice complex, the largest inland outcrop of permafrost, on lower reaches of the Kolyma river. An increase of around 20% in the turbidity of the Kolyma River was revealed during the summer low-flows in the reach downstream of the yedoma. The influx of suspended matter due to the melting of the slopes of the ice complex on hot summer days in the emerging network of turbidity streams was estimated at a value of more than 5 kg/s. The effect ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...