Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula
Abstract Density-depth curves constructed from seismic travel-time data observed at 25 locations, show a large variation over an essentially isothermal area ( T = −22±2.6° C). This is correlated with the wide range of mean annual accumulation values. ( A = 20 to 50g./cm. 2 yr). Quantitative estimate...
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Cambridge University Press (CUP)
1965
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Online Access: | http://dx.doi.org/10.1017/s0022143000018426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018426 |
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crcambridgeupr:10.1017/s0022143000018426 2024-03-03T08:38:50+00:00 Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula Behrendt, John C. 1965 http://dx.doi.org/10.1017/s0022143000018426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018426 en eng Cambridge University Press (CUP) Journal of Glaciology volume 5, issue 40, page 451-460 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1965 crcambridgeupr https://doi.org/10.1017/s0022143000018426 2024-02-08T08:47:47Z Abstract Density-depth curves constructed from seismic travel-time data observed at 25 locations, show a large variation over an essentially isothermal area ( T = −22±2.6° C). This is correlated with the wide range of mean annual accumulation values. ( A = 20 to 50g./cm. 2 yr). Quantitative estimates of mean annual accumulation can be obtained from seismic refraction data in this area by the expression A = 23.5+0.049(3500− V 200 ) where V 200 is the compressional wave velocity (m./sec.) observed at 200 m. from the shot point. The density-depth curves can be used to give estimates of accumulation by the expression: where ρ 40 is the density (g./cm. 3 ) at 40 m. depth. The internal consistency of these methods is indicated by the standard deviation of ±2.9./cm. 2 yr. for comparisons of accumulation estimates. The theoretical basis for these results is discussed. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Journal of Glaciology Cambridge University Press Antarctic Antarctic Peninsula Ellsworth Land ENVELOPE(-85.000,-85.000,-75.000,-75.000) Journal of Glaciology 5 40 451 460 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Behrendt, John C. Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
topic_facet |
Earth-Surface Processes |
description |
Abstract Density-depth curves constructed from seismic travel-time data observed at 25 locations, show a large variation over an essentially isothermal area ( T = −22±2.6° C). This is correlated with the wide range of mean annual accumulation values. ( A = 20 to 50g./cm. 2 yr). Quantitative estimates of mean annual accumulation can be obtained from seismic refraction data in this area by the expression A = 23.5+0.049(3500− V 200 ) where V 200 is the compressional wave velocity (m./sec.) observed at 200 m. from the shot point. The density-depth curves can be used to give estimates of accumulation by the expression: where ρ 40 is the density (g./cm. 3 ) at 40 m. depth. The internal consistency of these methods is indicated by the standard deviation of ±2.9./cm. 2 yr. for comparisons of accumulation estimates. The theoretical basis for these results is discussed. |
format |
Article in Journal/Newspaper |
author |
Behrendt, John C. |
author_facet |
Behrendt, John C. |
author_sort |
Behrendt, John C. |
title |
Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
title_short |
Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
title_full |
Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
title_fullStr |
Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
title_full_unstemmed |
Densification of Snow on the Ice Sheet of Ellsworth Land and the Southern Antarctic Peninsula |
title_sort |
densification of snow on the ice sheet of ellsworth land and the southern antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
1965 |
url |
http://dx.doi.org/10.1017/s0022143000018426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018426 |
long_lat |
ENVELOPE(-85.000,-85.000,-75.000,-75.000) |
geographic |
Antarctic Antarctic Peninsula Ellsworth Land |
geographic_facet |
Antarctic Antarctic Peninsula Ellsworth Land |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 5, issue 40, page 451-460 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000018426 |
container_title |
Journal of Glaciology |
container_volume |
5 |
container_issue |
40 |
container_start_page |
451 |
op_container_end_page |
460 |
_version_ |
1792507309560168448 |