Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016)
New measurements of Watson River sediment and solute concentrations and an extended river discharge record improved by acoustic Doppler current profiler (ADCP) measurements are used to calculate the total sediment and solute transport from a large ice-sheet sector in southern west Greenland. For the...
Published in: | Arctic, Antarctic, and Alpine Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Taylor & Francis
2018
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Online Access: | http://hdl.handle.net/11250/2581750 https://doi.org/10.1080/15230430.2018.1433789 |
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2581750 2024-03-03T08:39:23+00:00 Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) Hasholt, B. van As, Dirk Mikkelsen, Andreas B. Mernild, Jacob Sebastian Haugaard Yde, Jacob C. Greenland 2018 application/pdf http://hdl.handle.net/11250/2581750 https://doi.org/10.1080/15230430.2018.1433789 eng eng Taylor & Francis Hasholt, B., van As, D., Mikkelsen, A. B., Mernild, S. H., & Yde, J. C. (2018). Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016). Arctic, Antarctic, and Alpine Research, 50(1) urn:issn:1523-0430 http://hdl.handle.net/11250/2581750 https://doi.org/10.1080/15230430.2018.1433789. cristin:1590881 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The authors. 1-13 50 Arctic, Antarctic and Alpine research 1 Greenland ice sheet Kangerlussuaq sediment transport glacial erosion solute transport Watson river VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Journal article Peer reviewed 2018 fthsvestlandet https://doi.org/10.1080/15230430.2018.1433789 2024-02-02T12:41:04Z New measurements of Watson River sediment and solute concentrations and an extended river discharge record improved by acoustic Doppler current profiler (ADCP) measurements are used to calculate the total sediment and solute transport from a large ice-sheet sector in southern west Greenland. For the 2006–2016 period, the mean annual sediment and solute transport was 17.5 ± 7.2 × 106 t and 85 ± 30 × 103 t, respectively (standard deviation given). The highest annual transport occurred in 2010, attaining values of 29.6 × 106 t and 138 × 103 t, respectively. The corresponding annual average values of specific transport are 1.39 × 103 t km−2 a−1 for sediment and 6.7 t km−2 a−1 for solutes from the approximately 12,600 km2 (95% ice covered) catchment, yielding an area-average erosion rate of 0.5 mm a−1. The specific transport is likely several times higher under the ice sheet near the margin where all meltwater passes than it is in the interior where the ice sheet is frozen to the bed. We conclude that the Greenland Ice Sheet is a large supplier of sediment and solutes to the surrounding fjords and seas. We find that the proglacial area can be a net source of sediments during high floods and we confirm that an increased amount of meltwater-transported sediments can explain the expansion of deltas around Greenland, contradictory to delta erosion observed elsewhere in the Arctic in recent years. publishedVersion Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Greenland Ice Sheet Kangerlussuaq Høgskulen på Vestlandet: HVL Open Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Arctic, Antarctic, and Alpine Research 50 1 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
topic |
Greenland ice sheet Kangerlussuaq sediment transport glacial erosion solute transport Watson river VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
spellingShingle |
Greenland ice sheet Kangerlussuaq sediment transport glacial erosion solute transport Watson river VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Hasholt, B. van As, Dirk Mikkelsen, Andreas B. Mernild, Jacob Sebastian Haugaard Yde, Jacob C. Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
topic_facet |
Greenland ice sheet Kangerlussuaq sediment transport glacial erosion solute transport Watson river VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
description |
New measurements of Watson River sediment and solute concentrations and an extended river discharge record improved by acoustic Doppler current profiler (ADCP) measurements are used to calculate the total sediment and solute transport from a large ice-sheet sector in southern west Greenland. For the 2006–2016 period, the mean annual sediment and solute transport was 17.5 ± 7.2 × 106 t and 85 ± 30 × 103 t, respectively (standard deviation given). The highest annual transport occurred in 2010, attaining values of 29.6 × 106 t and 138 × 103 t, respectively. The corresponding annual average values of specific transport are 1.39 × 103 t km−2 a−1 for sediment and 6.7 t km−2 a−1 for solutes from the approximately 12,600 km2 (95% ice covered) catchment, yielding an area-average erosion rate of 0.5 mm a−1. The specific transport is likely several times higher under the ice sheet near the margin where all meltwater passes than it is in the interior where the ice sheet is frozen to the bed. We conclude that the Greenland Ice Sheet is a large supplier of sediment and solutes to the surrounding fjords and seas. We find that the proglacial area can be a net source of sediments during high floods and we confirm that an increased amount of meltwater-transported sediments can explain the expansion of deltas around Greenland, contradictory to delta erosion observed elsewhere in the Arctic in recent years. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hasholt, B. van As, Dirk Mikkelsen, Andreas B. Mernild, Jacob Sebastian Haugaard Yde, Jacob C. |
author_facet |
Hasholt, B. van As, Dirk Mikkelsen, Andreas B. Mernild, Jacob Sebastian Haugaard Yde, Jacob C. |
author_sort |
Hasholt, B. |
title |
Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
title_short |
Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
title_full |
Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
title_fullStr |
Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
title_full_unstemmed |
Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016) |
title_sort |
observed sediment and solute transport from the kangerlussuaq sector of the greenland ice sheet (2006–2016) |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2581750 https://doi.org/10.1080/15230430.2018.1433789 |
op_coverage |
Greenland |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Greenland Kangerlussuaq |
geographic_facet |
Arctic Greenland Kangerlussuaq |
genre |
Antarctic and Alpine Research Arctic Arctic Greenland Ice Sheet Kangerlussuaq |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Greenland Ice Sheet Kangerlussuaq |
op_source |
1-13 50 Arctic, Antarctic and Alpine research 1 |
op_relation |
Hasholt, B., van As, D., Mikkelsen, A. B., Mernild, S. H., & Yde, J. C. (2018). Observed sediment and solute transport from the Kangerlussuaq sector of the Greenland Ice Sheet (2006–2016). Arctic, Antarctic, and Alpine Research, 50(1) urn:issn:1523-0430 http://hdl.handle.net/11250/2581750 https://doi.org/10.1080/15230430.2018.1433789. cristin:1590881 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The authors. |
op_doi |
https://doi.org/10.1080/15230430.2018.1433789 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
_version_ |
1792494903909941248 |