Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland
Suspended sediment concentration and transport is modeled for the Mittivakkat Glacier located on Ammassalik Island, South-East Greenland, using a numerical sediment model based on lumped-elements. Empirical equations calculate sediment erosion and deposition within a constant idealized glacier drain...
Published in: | Arctic, Antarctic, and Alpine Research |
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2012
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/4775101d-8f88-466c-83ae-991d62449d14 https://doi.org/10.1657/1938-4246-44.3.306 http://www.scopus.com/inward/record.url?scp=84870674500&partnerID=8YFLogxK |
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ftsydanskunivpub:oai:sdu.dk:publications/4775101d-8f88-466c-83ae-991d62449d14 2024-09-09T18:59:28+00:00 Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland Fausto, Robert Mernild, Sebastian Hasholt, Bent Ahlstrøm, Andreas Knudsen, Niels 2012-08-01 https://portal.findresearcher.sdu.dk/da/publications/4775101d-8f88-466c-83ae-991d62449d14 https://doi.org/10.1657/1938-4246-44.3.306 http://www.scopus.com/inward/record.url?scp=84870674500&partnerID=8YFLogxK eng eng https://portal.findresearcher.sdu.dk/da/publications/4775101d-8f88-466c-83ae-991d62449d14 info:eu-repo/semantics/openAccess Fausto , R , Mernild , S , Hasholt , B , Ahlstrøm , A & Knudsen , N 2012 , ' Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland ' , Arctic, Antarctic, and Alpine Research , vol. 44 , no. 3 , pp. 306-318 . https://doi.org/10.1657/1938-4246-44.3.306 article 2012 ftsydanskunivpub https://doi.org/10.1657/1938-4246-44.3.306 2024-06-18T14:45:59Z Suspended sediment concentration and transport is modeled for the Mittivakkat Glacier located on Ammassalik Island, South-East Greenland, using a numerical sediment model based on lumped-elements. Empirical equations calculate sediment erosion and deposition within a constant idealized glacier drainage system. The sediment model is forced by observations and an energy balance model based on meteorological observations that provide a simulated Surface Melt and liquid Precipitation available for supra-, en-, sub-, and proglacial flow processes after vertical percolation and potential storage within the snowpack (henceforth SMP) from the glacier surface which is available for subglacial erosion, glaciofluvial transport, and deposition within the drainage system. The idealized drainage system is constrained following the descriptions and conclusions from previous work. A model simulation run for summer 2005 shows that the cumulative modeled suspended sediment transport lies within 3% when compared with observations. Model results show that the temporal changes in the calculated suspended sediment concentrations vary over the melt season in some agreement with measured field data for the summer of 2005. Forcing the sediment model gives a correlation coefficient of 0.89 using observed proglacial meltwater discharge values and the correlation coefficient is 0.63 using modeled supraglacial meltwater runoff. The sediment model successfully captures the observed concentration and transport of suspended sediment which indicates a sufficient sediment reservoir available for transport through the idealized drainage system. Article in Journal/Newspaper Ammassalik Antarctic and Alpine Research Arctic East Greenland glacier Greenland University of Southern Denmark Research Portal Greenland Arctic, Antarctic, and Alpine Research 44 3 306 318 |
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Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
description |
Suspended sediment concentration and transport is modeled for the Mittivakkat Glacier located on Ammassalik Island, South-East Greenland, using a numerical sediment model based on lumped-elements. Empirical equations calculate sediment erosion and deposition within a constant idealized glacier drainage system. The sediment model is forced by observations and an energy balance model based on meteorological observations that provide a simulated Surface Melt and liquid Precipitation available for supra-, en-, sub-, and proglacial flow processes after vertical percolation and potential storage within the snowpack (henceforth SMP) from the glacier surface which is available for subglacial erosion, glaciofluvial transport, and deposition within the drainage system. The idealized drainage system is constrained following the descriptions and conclusions from previous work. A model simulation run for summer 2005 shows that the cumulative modeled suspended sediment transport lies within 3% when compared with observations. Model results show that the temporal changes in the calculated suspended sediment concentrations vary over the melt season in some agreement with measured field data for the summer of 2005. Forcing the sediment model gives a correlation coefficient of 0.89 using observed proglacial meltwater discharge values and the correlation coefficient is 0.63 using modeled supraglacial meltwater runoff. The sediment model successfully captures the observed concentration and transport of suspended sediment which indicates a sufficient sediment reservoir available for transport through the idealized drainage system. |
format |
Article in Journal/Newspaper |
author |
Fausto, Robert Mernild, Sebastian Hasholt, Bent Ahlstrøm, Andreas Knudsen, Niels |
spellingShingle |
Fausto, Robert Mernild, Sebastian Hasholt, Bent Ahlstrøm, Andreas Knudsen, Niels Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
author_facet |
Fausto, Robert Mernild, Sebastian Hasholt, Bent Ahlstrøm, Andreas Knudsen, Niels |
author_sort |
Fausto, Robert |
title |
Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
title_short |
Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
title_full |
Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
title_fullStr |
Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
title_full_unstemmed |
Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland |
title_sort |
modeling suspended sediment concentration and transport, mittivakkat glacier, southeast greenland |
publishDate |
2012 |
url |
https://portal.findresearcher.sdu.dk/da/publications/4775101d-8f88-466c-83ae-991d62449d14 https://doi.org/10.1657/1938-4246-44.3.306 http://www.scopus.com/inward/record.url?scp=84870674500&partnerID=8YFLogxK |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Ammassalik Antarctic and Alpine Research Arctic East Greenland glacier Greenland |
genre_facet |
Ammassalik Antarctic and Alpine Research Arctic East Greenland glacier Greenland |
op_source |
Fausto , R , Mernild , S , Hasholt , B , Ahlstrøm , A & Knudsen , N 2012 , ' Modeling suspended sediment concentration and transport, Mittivakkat glacier, southeast Greenland ' , Arctic, Antarctic, and Alpine Research , vol. 44 , no. 3 , pp. 306-318 . https://doi.org/10.1657/1938-4246-44.3.306 |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/4775101d-8f88-466c-83ae-991d62449d14 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1657/1938-4246-44.3.306 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
44 |
container_issue |
3 |
container_start_page |
306 |
op_container_end_page |
318 |
_version_ |
1809933938943066112 |