Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps
The main ice caps on Devon Island, central and northeast Ellesmere Island, and Axel Heiberg Island were sounded using a 620 MHz radar. Ice depths were found to be generally between 300 and 800 m. The bedrock topography is everywhere very irregular. There is a pronounced difference between the thickn...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1977
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e77-237 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-237 |
id |
crcansciencepubl:10.1139/e77-237 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e77-237 2023-12-17T10:25:29+01:00 Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps Koerner, R. M. 1977 http://dx.doi.org/10.1139/e77-237 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-237 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 14, issue 12, page 2697-2705 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1977 crcansciencepubl https://doi.org/10.1139/e77-237 2023-11-19T13:39:39Z The main ice caps on Devon Island, central and northeast Ellesmere Island, and Axel Heiberg Island were sounded using a 620 MHz radar. Ice depths were found to be generally between 300 and 800 m. The bedrock topography is everywhere very irregular. There is a pronounced difference between the thickness, and hence volume, of ice on the east and west sides of the Central Ellesmere and Devon ice caps. The greater thickness on the east sides is attributed to much higher snow accumulation rates there and it is calculated that the asymmetry between the east and west sides began to develop some 8000 years ago. The greater thickness of ice on the ice caps facing Baffin Bay must be considered in any derivation of the dimensions of the Wisconsin ice sheet from maps of isostatic rebound in the Queen Elizabeth Islands. Some of the northwest–southeast tilt of strandlines on Devon and Southern Ellesmere islands can be attributed to the suppression of rebound by these thick ice masses. It is inferred, from the greater symmetry of ice caps in Northern Ellesmere and to a lesser extent Axel Heiberg Island, that the Arctic Ocean is a much less effective moisture source than Baffin Bay. Article in Journal/Newspaper Arctic Arctic Ocean Axel Heiberg Island Baffin Bay Baffin Bay Baffin Devon Island Ellesmere Island Ice Sheet Queen Elizabeth Islands Canadian Science Publishing (via Crossref) Arctic Arctic Ocean Baffin Bay Ellesmere Island Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canadian Journal of Earth Sciences 14 12 2697 2705 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Koerner, R. M. Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
topic_facet |
General Earth and Planetary Sciences |
description |
The main ice caps on Devon Island, central and northeast Ellesmere Island, and Axel Heiberg Island were sounded using a 620 MHz radar. Ice depths were found to be generally between 300 and 800 m. The bedrock topography is everywhere very irregular. There is a pronounced difference between the thickness, and hence volume, of ice on the east and west sides of the Central Ellesmere and Devon ice caps. The greater thickness on the east sides is attributed to much higher snow accumulation rates there and it is calculated that the asymmetry between the east and west sides began to develop some 8000 years ago. The greater thickness of ice on the ice caps facing Baffin Bay must be considered in any derivation of the dimensions of the Wisconsin ice sheet from maps of isostatic rebound in the Queen Elizabeth Islands. Some of the northwest–southeast tilt of strandlines on Devon and Southern Ellesmere islands can be attributed to the suppression of rebound by these thick ice masses. It is inferred, from the greater symmetry of ice caps in Northern Ellesmere and to a lesser extent Axel Heiberg Island, that the Arctic Ocean is a much less effective moisture source than Baffin Bay. |
format |
Article in Journal/Newspaper |
author |
Koerner, R. M. |
author_facet |
Koerner, R. M. |
author_sort |
Koerner, R. M. |
title |
Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
title_short |
Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
title_full |
Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
title_fullStr |
Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
title_full_unstemmed |
Ice thickness measurements and their implications with respect to past and present ice volumes in the Canadian High Arctic ice caps |
title_sort |
ice thickness measurements and their implications with respect to past and present ice volumes in the canadian high arctic ice caps |
publisher |
Canadian Science Publishing |
publishDate |
1977 |
url |
http://dx.doi.org/10.1139/e77-237 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-237 |
long_lat |
ENVELOPE(-88.000,-88.000,75.252,75.252) ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-91.001,-91.001,79.752,79.752) |
geographic |
Arctic Arctic Ocean Baffin Bay Ellesmere Island Devon Island Heiberg Axel Heiberg Island |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Ellesmere Island Devon Island Heiberg Axel Heiberg Island |
genre |
Arctic Arctic Ocean Axel Heiberg Island Baffin Bay Baffin Bay Baffin Devon Island Ellesmere Island Ice Sheet Queen Elizabeth Islands |
genre_facet |
Arctic Arctic Ocean Axel Heiberg Island Baffin Bay Baffin Bay Baffin Devon Island Ellesmere Island Ice Sheet Queen Elizabeth Islands |
op_source |
Canadian Journal of Earth Sciences volume 14, issue 12, page 2697-2705 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e77-237 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
14 |
container_issue |
12 |
container_start_page |
2697 |
op_container_end_page |
2705 |
_version_ |
1785577116297854976 |