Observations of runoff and sediment and dissolved loads from the Greenland Ice Sheet at Kangerlussuaq, West Greenland, 2007 to 2010

Bent Hasholt; Andreas Peter Bech Mikkelsen; Morten Holtegaard Nielsen; Morten Andreas Dahl Larsen

doi:10.1127/0372-8854/2012/s-00121

Observations of runoff and sediment and dissolved loads from the Greenland Ice Sheet at Kangerlussuaq, West Greenland, 2007 to 2010

Bent Hasholt, Andreas Peter Bech Mikkelsen, Morten Holtegaard Nielsen, Morten Andreas Dahl Larsen

51 Citations (Scopus)

Abstract

Observations from 2007 to 2010 of runoff, sediment and solute delivery from a segment of the Greenland Ice Sheet (GrIS) and the proglacial landscape draining into the fjord at Kangerlussuaq are presented. The observations include at least three jökulhlaups and extreme recordings from 2010. The average runoff from the 9743 km2 catchment was 377 mm (min. 267 mm and max. 565 mm) and the sediment delivery was 744 t km–2 y–1 with (min. 493 and max. 1221t km–2 y–1). Solute transport was only 0.4 % of the total load (sediment load + dissolved load). These new values are a factor two higher than values previously published for 2007 and 2008. The average effective erosion from the catchment was 0.28 mm (min. 0.18 and max. 0.45 mm). The erosion is larger than indicated from most other locations along the GrIS, but in the same order of magnitude as erosion in other glaciated areas at the same latitude, e.g. Norway. The sandur in the proglacial area acts as a sediment sink for a lot of the sediments from the GrIS.

Original language	English
Journal	Zeitschrift für Geomorphologie
Volume	57
Issue number	2
Pages (from-to)	3-27
Number of pages	25
ISSN	0372-8854
DOIs	https://doi.org/10.1127/0372-8854/2012/s-00121
Publication status	Published - 2013

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10.1127/0372-8854/2012/s-00121

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Observations of runoff and sediment and dissolved loads from the Greenland Ice Sheet at Kangerlussuaq, West Greenland, 2007 to 2010. / Hasholt, Bent; Mikkelsen, Andreas Peter Bech; Nielsen, Morten Holtegaard et al.

In: Zeitschrift für Geomorphologie, Vol. 57, No. 2, 2013, p. 3-27.

Research output: Contribution to journal › Journal article › Research › peer-review

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title = "Observations of runoff and sediment and dissolved loads from the Greenland Ice Sheet at Kangerlussuaq, West Greenland, 2007 to 2010",

abstract = "Observations from 2007 to 2010 of runoff, sediment and solute delivery from a segment of the Greenland Ice Sheet (GrIS) and the proglacial landscape draining into the fjord at Kangerlussuaq are presented. The observations include at least three j{\"o}kulhlaups and extreme recordings from 2010. The average runoff from the 9743 km2 catchment was 377 mm (min. 267 mm and max. 565 mm) and the sediment delivery was 744 t km–2 y–1 with (min. 493 and max. 1221t km–2 y–1). Solute transport was only 0.4 % of the total load (sediment load + dissolved load). These new values are a factor two higher than values previously published for 2007 and 2008. The average effective erosion from the catchment was 0.28 mm (min. 0.18 and max. 0.45 mm). The erosion is larger than indicated from most other locations along the GrIS, but in the same order of magnitude as erosion in other glaciated areas at the same latitude, e.g. Norway. The sandur in the proglacial area acts as a sediment sink for a lot of the sediments from the GrIS. ",

author = "Bent Hasholt and Mikkelsen, {Andreas Peter Bech} and Nielsen, {Morten Holtegaard} and Larsen, {Morten Andreas Dahl}",

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T1 - Observations of runoff and sediment and dissolved loads from the Greenland Ice Sheet at Kangerlussuaq, West Greenland, 2007 to 2010

AU - Hasholt, Bent

AU - Mikkelsen, Andreas Peter Bech

AU - Nielsen, Morten Holtegaard

AU - Larsen, Morten Andreas Dahl

PY - 2013

Y1 - 2013

N2 - Observations from 2007 to 2010 of runoff, sediment and solute delivery from a segment of the Greenland Ice Sheet (GrIS) and the proglacial landscape draining into the fjord at Kangerlussuaq are presented. The observations include at least three jökulhlaups and extreme recordings from 2010. The average runoff from the 9743 km2 catchment was 377 mm (min. 267 mm and max. 565 mm) and the sediment delivery was 744 t km–2 y–1 with (min. 493 and max. 1221t km–2 y–1). Solute transport was only 0.4 % of the total load (sediment load + dissolved load). These new values are a factor two higher than values previously published for 2007 and 2008. The average effective erosion from the catchment was 0.28 mm (min. 0.18 and max. 0.45 mm). The erosion is larger than indicated from most other locations along the GrIS, but in the same order of magnitude as erosion in other glaciated areas at the same latitude, e.g. Norway. The sandur in the proglacial area acts as a sediment sink for a lot of the sediments from the GrIS.

AB - Observations from 2007 to 2010 of runoff, sediment and solute delivery from a segment of the Greenland Ice Sheet (GrIS) and the proglacial landscape draining into the fjord at Kangerlussuaq are presented. The observations include at least three jökulhlaups and extreme recordings from 2010. The average runoff from the 9743 km2 catchment was 377 mm (min. 267 mm and max. 565 mm) and the sediment delivery was 744 t km–2 y–1 with (min. 493 and max. 1221t km–2 y–1). Solute transport was only 0.4 % of the total load (sediment load + dissolved load). These new values are a factor two higher than values previously published for 2007 and 2008. The average effective erosion from the catchment was 0.28 mm (min. 0.18 and max. 0.45 mm). The erosion is larger than indicated from most other locations along the GrIS, but in the same order of magnitude as erosion in other glaciated areas at the same latitude, e.g. Norway. The sandur in the proglacial area acts as a sediment sink for a lot of the sediments from the GrIS.

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DO - 10.1127/0372-8854/2012/s-00121

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JO - Zeitschrift für Geomorphologie

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