Diverse supraglacial drainage patterns on the Devon ice Cap, Arctic Canada

[en] The Devon Ice Cap (DIC) is one of the largest ice masses in the Canadian Arctic. Each summer, extensive supraglacial river networks develop on the DIC surface and route large volumes of meltwater from ice caps to the ocean. Mapping their extent and understanding their temporal evolution are important for validating runoff routing and melt volumes predicted by regional climate models (RCMs). We use 10 m Sentinel-2 images captured on 28 July and 10/11 August 2016 to map supraglacial rivers across the entire DIC (12,100 km2). Both dendritic and parallel supraglacial drainage patterns are found, with a total length of 44,941 km and a mean drainage density (Dd) of 3.71 km−1. As the melt season progresses, Dd increases and supraglacial rivers form at progressively higher elevations. There is a positive correlation between RCM-derived surface runoff and satellite-mapped Dd, suggesting that supraglacial drainage density is primarily controlled by surface runoff.

Disciplines :

Earth sciences & physical geography

Author, co-author :

Lu, Y.

Yang, K.

Lu, X.

Smithd, L.

Sole, A.

Livingstone, S.

Fettweis, Xavier ; Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie

Lia, M.

Language :

English

Title :

Diverse supraglacial drainage patterns on the Devon ice Cap, Arctic Canada

Publication date :

09 November 2020

Journal title :

Journal of Maps

eISSN :

1744-5647

Publisher :

Taylor and Francis, Abingdon, United Kingdom

Volume :

Pages :

834-846

Peer reviewed :

Peer Reviewed verified by ORBi

Tags :

CÉCI : Consortium des Équipements de Calcul Intensif

Additional URL :

https://doi.org/10.1080/17445647.2020.1838353

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
CÉCI - Consortium des Équipements de Calcul Intensif [BE]

Available on ORBi :

since 14 November 2020

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