Proglacial streams runoff dynamics in Devil´s Bay, Vega Island, Antarctica

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Publikace nespadá pod Ekonomicko-správní fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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KAVAN Jan HRBÁČEK Filip STRINGER Christopher D.

Rok publikování 2023
Druh Článek v odborném periodiku
Časopis / Zdroj Hydrological Sciences Journal
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1080/02626667.2023.2195559
Doi http://dx.doi.org/10.1080/02626667.2023.2195559
Klíčová slova runoff; water temperature; glaciers; eastern Antarctic Peninsula; atmospheric conditions
Popis Increasing temperatures in Antarctica have resulted in the enlargement of proglacial regions on the Antarctic Peninsula, following glacier melt. This melt has increased river activity yet direct runoff measurements remain scarce in Antarctica, despite it acting as a proxy for glacial ablation. Here, we present discharge and water temperature data from 2013 for three streams on Vega Island and discuss their relationship with air tempera-ture. The average discharge at the largest stream was 0.523 m3s-1 with a maximum of 5.510 m3s-1 – among the highest recorded in Antarctica. The rivers continued to flow even when temperatures dropped to -7°C, indicating that a large proportion of the total runoff originated sub-glacially. This is supported by the one- day time lag between air and water temperatures. Using river discharge as a proxy, we measured 124.5 ± 14.4 mm w.e. of ablation. This indirect measurement proved an effective tool to complement classic glaciological observations.
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