Features of the periglacial drainage lakes in Svalbard

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There are 705 periglacial lakes in Svalbard, formed by glacial retreat after the Little Ice Age. 98 of these lakes, with an area of more than 100 000 m2, have river outflow. The rivers flowing from these lakes have significant channel slopes characteristic of mountainous regions. Most rivers flow into fjords. The morphometry of these objects has a characteristic feature: lakes have significant water surface areas, on average about 1.5 km2, and rivers have a small length, on average about 2.5 km. To the greatest extent, these parameters correspond to moraine-dammed lakes located in the west of Svalbard. On the example of the moraine-dammed Lake Bretjørna with an area of 1.6 km², it is shown that that the seasonal runoff from it is 2.5—3 times greater than the volume of the lake. Seven lakes have been identified that are of interest for studying sedimentation changes since the Little Ice Age, both in lake basins and in marine estuaries.

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Sobre autores

K. Romashova

State Scientific Center “Arctic and Antarctic Research Institute”

Autor responsável pela correspondência
Email: romashova.kv@hotmail.com
Rússia, Saint Petersburg

R. Chernov

Institute of Geography, Russian Academy of Sciences

Email: romashova.kv@hotmail.com
Rússia, Moscow

Bibliografia

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  2. Meshcheriakov N.I., Kokin O.V., Usyagina I.S., Kasatkina N.E. The Periglacial Lake Bretjorna (Ledovoe), Western Svalbard: History of Formation and Recent Sedimentation. Led i Sneg. Ice and Snow. 2023, 63 (3): 426–440. https://doi.org/10.31857/S2076673423030067 [In Russian].
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2. Fig. 1 Drainage periglacial lakes of the Spitsbergen archipelago (with an area of over 100 000 m2) 1 – lakes in contact with the glacier front; 2 – lakes in contact with the terminal moraine located beyond its borders; 3 – moraine-dammed lakes; 4 – lakes of various types with direct flow into the bay; 5 – the most promising lakes for studying bottom sediments

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3. Fig. 2. Hydrograph and suspended sediment discharge from Lake Bretjerna in 2022 1 – water discharge, m3/s; 2 – suspended sediment discharge, kg/s

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