Deltas, freshwater discharge, and waves along the Young Sound, NE Greenland

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  • Aart Kroon, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen, Denmark. ak@ign.ku.dk.
  • ,
  • Jakob Abermann, Asiaq, Greenland Survey, Postbox 1003, 3900, Nuuk, Greenland.
  • ,
  • Mette Bendixen, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen, Denmark.
  • ,
  • Magnus Lund
  • ,
  • Charlotte Sigsgaard, Section for Geography, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, Denmark.
  • ,
  • Kirstine Skov
  • Birger Ulf Hansen, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen, Denmark.

A wide range of delta morphologies occurs along the fringes of the Young Sound in Northeast Greenland due to spatial heterogeneity of delta regimes. In general, the delta regime is related to catchment and basin characteristics (geology, topography, drainage pattern, sediment availability, and bathymetry), fluvial discharges and associated sediment load, and processes by waves and currents. Main factors steering the Arctic fluvial discharges into the Young Sound are the snow and ice melt and precipitation in the catchment, and extreme events like glacier lake outburst floods (GLOFs). Waves are subordinate and only rework fringes of the delta plain forming sandy bars if the exposure and fetch are optimal. Spatial gradients and variability in driving forces (snow and precipitation) and catchment characteristics (amount of glacier coverage, sediment characteristics) as well as the strong and local influence of GLOFs in a specific catchment impede a simple upscaling of sediment fluxes from individual catchments toward a total sediment flux into the Young Sound.

OriginalsprogEngelsk
TidsskriftAmbio
Vol/bind46
NummerS1
Sider (fra-til)132-145
Antal sider14
ISSN0044-7447
DOI
StatusUdgivet - feb. 2017

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