Glacier surge as a trigger for the fastest delta growth in the Arctic

J. Kavan*, M. C. Strzelecki, D. I. Benn, A. Luckman, M. Roman, P. Zagórski

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

10 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

The widespread retreat of Svalbard glaciers has been frequently interrupted by short-lived surge advances. In the case of marine-terminating glaciers this is often expressed in the remodelling of coastal zones. Here, we analyzed the coastal zone changes in front of the recently surging Recherchebreen. The glacier advanced ca 1200 m since 2018 and suddenly stopped in June 2020 followed by the rapid formation of a delta system in front of its subglacial meltwater outlet. The delta advanced by ca 450 m with probably the fastest progradation rate ever detected in the Arctic region (ca 7 m/day). The synchroneity of the final slow-down of the glacier with the delta building indicates that this event records the release of stored water and sediments from beneath the glacier and thus provides direct evidence of drainage reorganisation at the termination of a surge. Such behaviour is likely common among Svalbard surging glaciers, but it only rarely leaves any direct geomorphic evidence.

Iaith wreiddiolSaesneg
Rhif yr erthygl700
CyfnodolynCommunications Earth & Environment
Cyfrol5
Rhif cyhoeddi1
Dyddiad ar-lein cynnar14 Tach 2024
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Rhag 2024

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