Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada
Abstract The movement at a marginal location on the Ward Hunt Ice Shelf, northern Ellesmere Island, was determined by repeated survey measurements with theodolite and geodimeter. The purpose and duration of the field work, and reduction of the observational data are described, and the resulting mean...
Published in: | Journal of Glaciology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1971
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000013186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000013186 |
id |
crcambridgeupr:10.1017/s0022143000013186 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000013186 2024-03-03T08:44:05+00:00 Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada Dorrer, E. 1971 http://dx.doi.org/10.1017/s0022143000013186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000013186 en eng Cambridge University Press (CUP) Journal of Glaciology volume 10, issue 59, page 211-225 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1971 crcambridgeupr https://doi.org/10.1017/s0022143000013186 2024-02-08T08:36:10Z Abstract The movement at a marginal location on the Ward Hunt Ice Shelf, northern Ellesmere Island, was determined by repeated survey measurements with theodolite and geodimeter. The purpose and duration of the field work, and reduction of the observational data are described, and the resulting mean ice velocity of 0.53 m year -1 is discussed. Strain-rates of a 1 km by 1 km deformation figure are determined. The parameters n and B of Glen’s power flow law are determined by using the equations given by Nye and Weertman. The results are compared with experimental data. Computed ice stresses show that the “ridge-and-trough" structure on the ice shelf surface is not originated by internal ice forces. The elevations of all survey markers have been determined from vertical-angle measurements, and the peculiarities of atmospheric refraction in near-surface layers are discussed. Article in Journal/Newspaper Ellesmere Island Ice Shelf Journal of Glaciology Ward Hunt Ice Shelf Cambridge University Press Ellesmere Island Canada Ward Hunt Ice Shelf ENVELOPE(-73.499,-73.499,83.122,83.122) Weertman ENVELOPE(-67.753,-67.753,-66.972,-66.972) Journal of Glaciology 10 59 211 225 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Dorrer, E. Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
topic_facet |
Earth-Surface Processes |
description |
Abstract The movement at a marginal location on the Ward Hunt Ice Shelf, northern Ellesmere Island, was determined by repeated survey measurements with theodolite and geodimeter. The purpose and duration of the field work, and reduction of the observational data are described, and the resulting mean ice velocity of 0.53 m year -1 is discussed. Strain-rates of a 1 km by 1 km deformation figure are determined. The parameters n and B of Glen’s power flow law are determined by using the equations given by Nye and Weertman. The results are compared with experimental data. Computed ice stresses show that the “ridge-and-trough" structure on the ice shelf surface is not originated by internal ice forces. The elevations of all survey markers have been determined from vertical-angle measurements, and the peculiarities of atmospheric refraction in near-surface layers are discussed. |
format |
Article in Journal/Newspaper |
author |
Dorrer, E. |
author_facet |
Dorrer, E. |
author_sort |
Dorrer, E. |
title |
Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
title_short |
Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
title_full |
Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
title_fullStr |
Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
title_full_unstemmed |
Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada |
title_sort |
movement of the ward hunt ice shelf, ellesmere island, n.w.t., canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
1971 |
url |
http://dx.doi.org/10.1017/s0022143000013186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000013186 |
long_lat |
ENVELOPE(-73.499,-73.499,83.122,83.122) ENVELOPE(-67.753,-67.753,-66.972,-66.972) |
geographic |
Ellesmere Island Canada Ward Hunt Ice Shelf Weertman |
geographic_facet |
Ellesmere Island Canada Ward Hunt Ice Shelf Weertman |
genre |
Ellesmere Island Ice Shelf Journal of Glaciology Ward Hunt Ice Shelf |
genre_facet |
Ellesmere Island Ice Shelf Journal of Glaciology Ward Hunt Ice Shelf |
op_source |
Journal of Glaciology volume 10, issue 59, page 211-225 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000013186 |
container_title |
Journal of Glaciology |
container_volume |
10 |
container_issue |
59 |
container_start_page |
211 |
op_container_end_page |
225 |
_version_ |
1792499555238936576 |