Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland
Meltwater runoff is an important component of the mass balance of the Greenland ice sheet (GrIS) and contributes to eustatic sea-level rise. In situ measurements of river runoff at the ∼325 outlets are nonexistent due to logistical difficulties. We develop a novel methodology using satellite observa...
Main Authors: | , , , , , |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | https://dspace.library.uu.nl/handle/1874/200554 |
id |
ftunivutrecht:oai:dspace.library.uu.nl:1874/200554 |
---|---|
record_format |
openpolar |
spelling |
ftunivutrecht:oai:dspace.library.uu.nl:1874/200554 2023-07-23T04:19:29+02:00 Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland McGRATH, D. Steffen, K. Overeem, I. Mernild, S. H. Hasholt, B. van den Broeke, M.R. Marine and Atmospheric Research Sub Dynamics Meteorology Dep Natuurkunde 2010 text/plain https://dspace.library.uu.nl/handle/1874/200554 en eng 0022-1430 https://dspace.library.uu.nl/handle/1874/200554 info:eu-repo/semantics/OpenAccess Article 2010 ftunivutrecht 2023-07-01T23:48:29Z Meltwater runoff is an important component of the mass balance of the Greenland ice sheet (GrIS) and contributes to eustatic sea-level rise. In situ measurements of river runoff at the ∼325 outlets are nonexistent due to logistical difficulties. We develop a novel methodology using satellite observations of sediment plumes as a proxy for the onset, duration and volume of meltwater runoff from a basin of the GrIS. Sediment plumes integrate numerous poorly constrained processes, including meltwater refreezing and supra- and englacial water storage, and are formed by meltwater that exits the GrIS and enters the ocean. Plume characteristics are measured in Moderate Resolution Imaging Spectroradiometer (MODIS, band 1, 250 m) satellite imagery during the 2001-08 melt seasons. Plume formation and cessation in Kangerlussuaq Fjord, West Greenland, are positively correlated (r2=0.88, n=5, p Article in Journal/Newspaper Greenland Ice Sheet Kangerlussuaq Utrecht University Repository Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
Meltwater runoff is an important component of the mass balance of the Greenland ice sheet (GrIS) and contributes to eustatic sea-level rise. In situ measurements of river runoff at the ∼325 outlets are nonexistent due to logistical difficulties. We develop a novel methodology using satellite observations of sediment plumes as a proxy for the onset, duration and volume of meltwater runoff from a basin of the GrIS. Sediment plumes integrate numerous poorly constrained processes, including meltwater refreezing and supra- and englacial water storage, and are formed by meltwater that exits the GrIS and enters the ocean. Plume characteristics are measured in Moderate Resolution Imaging Spectroradiometer (MODIS, band 1, 250 m) satellite imagery during the 2001-08 melt seasons. Plume formation and cessation in Kangerlussuaq Fjord, West Greenland, are positively correlated (r2=0.88, n=5, p |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology Dep Natuurkunde |
format |
Article in Journal/Newspaper |
author |
McGRATH, D. Steffen, K. Overeem, I. Mernild, S. H. Hasholt, B. van den Broeke, M.R. |
spellingShingle |
McGRATH, D. Steffen, K. Overeem, I. Mernild, S. H. Hasholt, B. van den Broeke, M.R. Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
author_facet |
McGRATH, D. Steffen, K. Overeem, I. Mernild, S. H. Hasholt, B. van den Broeke, M.R. |
author_sort |
McGRATH, D. |
title |
Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
title_short |
Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
title_full |
Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
title_fullStr |
Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
title_full_unstemmed |
Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland |
title_sort |
sediment plumes as a proxy for local ice-sheet runoff in kangerlussuaq fjord, west greenland |
publishDate |
2010 |
url |
https://dspace.library.uu.nl/handle/1874/200554 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Greenland Ice Sheet Kangerlussuaq |
genre_facet |
Greenland Ice Sheet Kangerlussuaq |
op_relation |
0022-1430 https://dspace.library.uu.nl/handle/1874/200554 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772182609356390400 |