The Use of the Rammsonde as an Instrument for Determining the Density of Firn
Abstract It has been found that in the cold firn of the Greenland Ice Sheet a direct relationship exists between the specific gravity of a layer and its “resistance to penetration” as measured with a Rammsonde. Corrections which should be applied to the measured “resistance” to allow for the frictio...
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Language: | English |
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Cambridge University Press (CUP)
1956
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Online Access: | http://dx.doi.org/10.1017/s0022143000024941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000024941 |
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crcambridgeupr:10.1017/s0022143000024941 2024-03-03T08:45:01+00:00 The Use of the Rammsonde as an Instrument for Determining the Density of Firn Bull, C. 1956 http://dx.doi.org/10.1017/s0022143000024941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000024941 en eng Cambridge University Press (CUP) Journal of Glaciology volume 2, issue 20, page 714-718 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1956 crcambridgeupr https://doi.org/10.1017/s0022143000024941 2024-02-08T08:32:56Z Abstract It has been found that in the cold firn of the Greenland Ice Sheet a direct relationship exists between the specific gravity of a layer and its “resistance to penetration” as measured with a Rammsonde. Corrections which should be applied to the measured “resistance” to allow for the frictional resistance of the walls of the hole on the Rammsonde tube are discussed. In certain circumstances these corrections can be estimated with reasonable accuracy for tube lengths up to three metres. The statistical method of obtaining the relationships between “resistance” and specific gravity is briefly outlined, and the effect of the size of the snow grains is also considered. It is shown that under these particular conditions it is possible, from measurements of “resistance”, to estimate the specific gravity of a firn layer with a standard error of 0.04, when the specific gravity of the sample is in the range 0.3 to 0.57. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Greenland Journal of Glaciology 2 20 714 718 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Bull, C. The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
topic_facet |
Earth-Surface Processes |
description |
Abstract It has been found that in the cold firn of the Greenland Ice Sheet a direct relationship exists between the specific gravity of a layer and its “resistance to penetration” as measured with a Rammsonde. Corrections which should be applied to the measured “resistance” to allow for the frictional resistance of the walls of the hole on the Rammsonde tube are discussed. In certain circumstances these corrections can be estimated with reasonable accuracy for tube lengths up to three metres. The statistical method of obtaining the relationships between “resistance” and specific gravity is briefly outlined, and the effect of the size of the snow grains is also considered. It is shown that under these particular conditions it is possible, from measurements of “resistance”, to estimate the specific gravity of a firn layer with a standard error of 0.04, when the specific gravity of the sample is in the range 0.3 to 0.57. |
format |
Article in Journal/Newspaper |
author |
Bull, C. |
author_facet |
Bull, C. |
author_sort |
Bull, C. |
title |
The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
title_short |
The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
title_full |
The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
title_fullStr |
The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
title_full_unstemmed |
The Use of the Rammsonde as an Instrument for Determining the Density of Firn |
title_sort |
use of the rammsonde as an instrument for determining the density of firn |
publisher |
Cambridge University Press (CUP) |
publishDate |
1956 |
url |
http://dx.doi.org/10.1017/s0022143000024941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000024941 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 2, issue 20, page 714-718 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000024941 |
container_title |
Journal of Glaciology |
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2 |
container_issue |
20 |
container_start_page |
714 |
op_container_end_page |
718 |
_version_ |
1792500536846581760 |