Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland
The technical properties and general state of permafrost in Greenland is not well documented. A new coordinated investigation has been initiated, for ground temperature measurements and permafrost mapping in Greenlandic towns in sporadic, discontinuous and continuous permafrost zones. We present inv...
Main Authors: | , , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | English |
Published: |
Institute of Northern Engineering, University of Alaska Fairbanks
2008
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/7d806d0d-0d42-4480-a3e6-16e77754a421 |
id |
ftdtupubl:oai:pure.atira.dk:publications/7d806d0d-0d42-4480-a3e6-16e77754a421 |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/7d806d0d-0d42-4480-a3e6-16e77754a421 2023-05-15T13:02:58+02:00 Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland Ingeman-Nielsen, Thomas Foged, Niels Nielsen Butzbach, Rune Jørgensen, Anders Stuhr 2008 https://orbit.dtu.dk/en/publications/7d806d0d-0d42-4480-a3e6-16e77754a421 eng eng Institute of Northern Engineering, University of Alaska Fairbanks info:eu-repo/semantics/closedAccess Ingeman-Nielsen , T , Foged , N N , Butzbach , R & Jørgensen , A S 2008 , Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland . in Ninth International Conference on Permafrost . vol. 1 , Institute of Northern Engineering, University of Alaska Fairbanks , Fairbanks , pp. 773-778 , 9th International Conference on Permafrost , Fairbanks, AK , United States , 29/06/2008 . Ice content resistivity survey saline permafrost temperature measurements contributionToPeriodical 2008 ftdtupubl 2022-08-14T07:41:23Z The technical properties and general state of permafrost in Greenland is not well documented. A new coordinated investigation has been initiated, for ground temperature measurements and permafrost mapping in Greenlandic towns in sporadic, discontinuous and continuous permafrost zones. We present investigation results from one of the sites, located at Ilulissat, in an area of discontinuous saline permafrost. We have established ground temperature measurement stations and conducted a shallow geoelectrical study. Our results show that the sediments in the studied area mainly consist of very frost susceptible silty clays. The area has permafrost with a maximum active layer thickness between 0.9 and 1 m. In spite of low permafrost temperatures a considerable part of the pore water is unfrozen, due to high residual salt concentrations. Consequently, the unfrozen water content dominates the technical properties, and the sediments have a limited heat capacity available, should the temperature conditions change. Other Non-Article Part of Journal/Newspaper Active layer thickness Greenland greenlandic Ice Ilulissat permafrost Technical University of Denmark: DTU Orbit Greenland Ilulissat ENVELOPE(-51.099,-51.099,69.220,69.220) |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Ice content resistivity survey saline permafrost temperature measurements |
spellingShingle |
Ice content resistivity survey saline permafrost temperature measurements Ingeman-Nielsen, Thomas Foged, Niels Nielsen Butzbach, Rune Jørgensen, Anders Stuhr Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
topic_facet |
Ice content resistivity survey saline permafrost temperature measurements |
description |
The technical properties and general state of permafrost in Greenland is not well documented. A new coordinated investigation has been initiated, for ground temperature measurements and permafrost mapping in Greenlandic towns in sporadic, discontinuous and continuous permafrost zones. We present investigation results from one of the sites, located at Ilulissat, in an area of discontinuous saline permafrost. We have established ground temperature measurement stations and conducted a shallow geoelectrical study. Our results show that the sediments in the studied area mainly consist of very frost susceptible silty clays. The area has permafrost with a maximum active layer thickness between 0.9 and 1 m. In spite of low permafrost temperatures a considerable part of the pore water is unfrozen, due to high residual salt concentrations. Consequently, the unfrozen water content dominates the technical properties, and the sediments have a limited heat capacity available, should the temperature conditions change. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Ingeman-Nielsen, Thomas Foged, Niels Nielsen Butzbach, Rune Jørgensen, Anders Stuhr |
author_facet |
Ingeman-Nielsen, Thomas Foged, Niels Nielsen Butzbach, Rune Jørgensen, Anders Stuhr |
author_sort |
Ingeman-Nielsen, Thomas |
title |
Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
title_short |
Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
title_full |
Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
title_fullStr |
Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
title_full_unstemmed |
Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland |
title_sort |
geophysical investigations of saline permafrost at ilulissat, greenland |
publisher |
Institute of Northern Engineering, University of Alaska Fairbanks |
publishDate |
2008 |
url |
https://orbit.dtu.dk/en/publications/7d806d0d-0d42-4480-a3e6-16e77754a421 |
long_lat |
ENVELOPE(-51.099,-51.099,69.220,69.220) |
geographic |
Greenland Ilulissat |
geographic_facet |
Greenland Ilulissat |
genre |
Active layer thickness Greenland greenlandic Ice Ilulissat permafrost |
genre_facet |
Active layer thickness Greenland greenlandic Ice Ilulissat permafrost |
op_source |
Ingeman-Nielsen , T , Foged , N N , Butzbach , R & Jørgensen , A S 2008 , Geophysical Investigations of Saline Permafrost at Ilulissat, Greenland . in Ninth International Conference on Permafrost . vol. 1 , Institute of Northern Engineering, University of Alaska Fairbanks , Fairbanks , pp. 773-778 , 9th International Conference on Permafrost , Fairbanks, AK , United States , 29/06/2008 . |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1766325362417991680 |