A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica
Abstract The identification of a small region of grounded ice in the north-western sector of the Ross Ice Shelf has forced a re-evaluation of the mass-balance calculations carried out by Thomas and Bentley (1978). Those authors concluded that the Ross Ice Shelf up-stream of Crary Ice Rise was thicke...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1984
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000006274 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006274 |
id |
crcambridgeupr:10.1017/s0022143000006274 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000006274 2023-06-11T04:05:23+02:00 A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica Jezek, Kenneth C. Bentley, Charles R. 1984 http://dx.doi.org/10.1017/s0022143000006274 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006274 en eng Cambridge University Press (CUP) Journal of Glaciology volume 30, issue 106, page 381-384 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1984 crcambridgeupr https://doi.org/10.1017/s0022143000006274 2023-05-01T18:20:27Z Abstract The identification of a small region of grounded ice in the north-western sector of the Ross Ice Shelf has forced a re-evaluation of the mass-balance calculations carried out by Thomas and Bentley (1978). Those authors concluded that the Ross Ice Shelf up-stream of Crary Ice Rise was thickening, but they did not take into account the effects on the velocity field of grounded ice (of which they were unaware), which is located near the input gate to their volume element. Reasonable estimates of the degree to which the ice velocity just up-stream of the grounded ice is diminished indicate that it is no longer possible to conclude that the ice shelf is thickening using Thomas and Bentley’s original flow band. Therefore, a new flow band was chosen which was grid east of Thomas and Bentley’s band and unaffected by any nearby grounded areas. The mass balance in this flow band was found to be zero within experimental error; a difference exceeding about 0.2 m a −1 in magnitude between the thickening and bottom freeze-on rates is unlikely. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf Cambridge University Press (via Crossref) Crary Ice Rise ENVELOPE(-172.500,-172.500,-82.933,-82.933) Ross Ice Shelf Journal of Glaciology 30 106 381 384 |
institution |
Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Jezek, Kenneth C. Bentley, Charles R. A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
topic_facet |
Earth-Surface Processes |
description |
Abstract The identification of a small region of grounded ice in the north-western sector of the Ross Ice Shelf has forced a re-evaluation of the mass-balance calculations carried out by Thomas and Bentley (1978). Those authors concluded that the Ross Ice Shelf up-stream of Crary Ice Rise was thickening, but they did not take into account the effects on the velocity field of grounded ice (of which they were unaware), which is located near the input gate to their volume element. Reasonable estimates of the degree to which the ice velocity just up-stream of the grounded ice is diminished indicate that it is no longer possible to conclude that the ice shelf is thickening using Thomas and Bentley’s original flow band. Therefore, a new flow band was chosen which was grid east of Thomas and Bentley’s band and unaffected by any nearby grounded areas. The mass balance in this flow band was found to be zero within experimental error; a difference exceeding about 0.2 m a −1 in magnitude between the thickening and bottom freeze-on rates is unlikely. |
format |
Article in Journal/Newspaper |
author |
Jezek, Kenneth C. Bentley, Charles R. |
author_facet |
Jezek, Kenneth C. Bentley, Charles R. |
author_sort |
Jezek, Kenneth C. |
title |
A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
title_short |
A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
title_full |
A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
title_fullStr |
A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
title_full_unstemmed |
A Reconsideration of the Mass Balance of a Portion of the Ross Ice Shelf, Antarctica |
title_sort |
reconsideration of the mass balance of a portion of the ross ice shelf, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1984 |
url |
http://dx.doi.org/10.1017/s0022143000006274 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006274 |
long_lat |
ENVELOPE(-172.500,-172.500,-82.933,-82.933) |
geographic |
Crary Ice Rise Ross Ice Shelf |
geographic_facet |
Crary Ice Rise Ross Ice Shelf |
genre |
Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf |
genre_facet |
Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf |
op_source |
Journal of Glaciology volume 30, issue 106, page 381-384 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000006274 |
container_title |
Journal of Glaciology |
container_volume |
30 |
container_issue |
106 |
container_start_page |
381 |
op_container_end_page |
384 |
_version_ |
1768374990307065856 |