Direct measurements of ice-shelf bottom melting rates by phase sensitive radar
This paper describes the novel technique of using a phase-sensitive radio-echo system to determine the basal melt rate along a short profile near Halley Station on the Brunt Ice Shelf. After an interval of nine days the change in the thickness of ice, between a near surface reflecting horizon and th...
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ftnerc:oai:nora.nerc.ac.uk:16583 2023-05-15T15:47:03+02:00 Direct measurements of ice-shelf bottom melting rates by phase sensitive radar Corr, H. Doake, C.S.M. Jenkins, A. Nicholls, K.W. 2006 http://nora.nerc.ac.uk/id/eprint/16583/ http://folk.uib.no/ngfso/FRISP/Rep14/corr_2000.pdf unknown Corr, H.; Doake, C.S.M.; Jenkins, A. orcid:0000-0002-9117-0616 Nicholls, K.W. orcid:0000-0002-2188-4509 . 2006 Direct measurements of ice-shelf bottom melting rates by phase sensitive radar. Forum for Research into Ice Shelf Processes (FRISP) Report, 14. 7-9. Publication - Article NonPeerReviewed 2006 ftnerc 2023-02-04T19:30:35Z This paper describes the novel technique of using a phase-sensitive radio-echo system to determine the basal melt rate along a short profile near Halley Station on the Brunt Ice Shelf. After an interval of nine days the change in the thickness of ice, between a near surface reflecting horizon and the ice-shelf base, was measured. The utilization of internal reflectors as a reference horizon corrects for the effects of accumulation and densification that might occur over the measurement interval. During the nine-day interval the ice shelf thinned by 0.032 + or - 0.004 m, the strain rate contribution to this thinning was 0.003 + or - 0.001 m, giving a localized melt rate of 1.17 + or - 0.17 m/yr. Our measured value agrees well with a traditional continuitymethod. The accuracy of the phase sensitive radar system allows the spatial variation in basal melt-rate to be measured over a short time interval, permitting for the first time a measurement of the seasonal variation in melt rateThis paper describes the novel technique of using a phase-sensitive radio-echo system to determine the basal melt rate along a short profile near Halley Station on the Brunt Ice Shelf. After an interval of nine days the change in the thickness of ice, between a near surface reflecting horizon and the ice-shelf base, was measured. The utilization of internal reflectors as a reference horizon corrects for the effects of accumulation and densification that might occur over the measurement interval. During the nine-day interval the ice shelf thinned by 0.032 + or - 0.004 m, the strain rate contribution to this thinning was 0.003 + or - 0.001 m, giving a localized melt rate of 1.17 + or - 0.17 m/yr. Our measured value agrees well with a traditional continuity method. The accuracy of the phase sensitive radar system allows the spatial variation in basal melt-rate to be measured over a short time interval, permitting for the first time a measurement of the seasonal variation in melt rate Article in Journal/Newspaper Brunt Ice Shelf Ice Shelf Natural Environment Research Council: NERC Open Research Archive Halley Station ENVELOPE(-26.541,-26.541,-75.581,-75.581) Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
This paper describes the novel technique of using a phase-sensitive radio-echo system to determine the basal melt rate along a short profile near Halley Station on the Brunt Ice Shelf. After an interval of nine days the change in the thickness of ice, between a near surface reflecting horizon and the ice-shelf base, was measured. The utilization of internal reflectors as a reference horizon corrects for the effects of accumulation and densification that might occur over the measurement interval. During the nine-day interval the ice shelf thinned by 0.032 + or - 0.004 m, the strain rate contribution to this thinning was 0.003 + or - 0.001 m, giving a localized melt rate of 1.17 + or - 0.17 m/yr. Our measured value agrees well with a traditional continuitymethod. The accuracy of the phase sensitive radar system allows the spatial variation in basal melt-rate to be measured over a short time interval, permitting for the first time a measurement of the seasonal variation in melt rateThis paper describes the novel technique of using a phase-sensitive radio-echo system to determine the basal melt rate along a short profile near Halley Station on the Brunt Ice Shelf. After an interval of nine days the change in the thickness of ice, between a near surface reflecting horizon and the ice-shelf base, was measured. The utilization of internal reflectors as a reference horizon corrects for the effects of accumulation and densification that might occur over the measurement interval. During the nine-day interval the ice shelf thinned by 0.032 + or - 0.004 m, the strain rate contribution to this thinning was 0.003 + or - 0.001 m, giving a localized melt rate of 1.17 + or - 0.17 m/yr. Our measured value agrees well with a traditional continuity method. The accuracy of the phase sensitive radar system allows the spatial variation in basal melt-rate to be measured over a short time interval, permitting for the first time a measurement of the seasonal variation in melt rate |
format |
Article in Journal/Newspaper |
author |
Corr, H. Doake, C.S.M. Jenkins, A. Nicholls, K.W. |
spellingShingle |
Corr, H. Doake, C.S.M. Jenkins, A. Nicholls, K.W. Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
author_facet |
Corr, H. Doake, C.S.M. Jenkins, A. Nicholls, K.W. |
author_sort |
Corr, H. |
title |
Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
title_short |
Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
title_full |
Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
title_fullStr |
Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
title_full_unstemmed |
Direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
title_sort |
direct measurements of ice-shelf bottom melting rates by phase sensitive radar |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/16583/ http://folk.uib.no/ngfso/FRISP/Rep14/corr_2000.pdf |
long_lat |
ENVELOPE(-26.541,-26.541,-75.581,-75.581) ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
geographic |
Halley Station Brunt Ice Shelf |
geographic_facet |
Halley Station Brunt Ice Shelf |
genre |
Brunt Ice Shelf Ice Shelf |
genre_facet |
Brunt Ice Shelf Ice Shelf |
op_relation |
Corr, H.; Doake, C.S.M.; Jenkins, A. orcid:0000-0002-9117-0616 Nicholls, K.W. orcid:0000-0002-2188-4509 . 2006 Direct measurements of ice-shelf bottom melting rates by phase sensitive radar. Forum for Research into Ice Shelf Processes (FRISP) Report, 14. 7-9. |
_version_ |
1766381852452454400 |