Vertical-strain measurements in firn at Siple Dome, Antarctica
ABSTRACT. We measured vertical strain in the firn at Siple Dome, Antarctica, using two systems, both of which measure relative displacements over time of metal markers placed in an air-filled borehole. One system uses a metal-detecting tuned coil, and the other uses a video camera to locate themarke...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.548.1480 2023-05-15T13:39:15+02:00 Vertical-strain measurements in firn at Siple Dome, Antarctica Robert L. Hawley Edwin D. Waddington Greggw Lamorey The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.1480 http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.1480 http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf text 2005 ftciteseerx 2016-01-08T11:23:11Z ABSTRACT. We measured vertical strain in the firn at Siple Dome, Antarctica, using two systems, both of which measure relative displacements over time of metal markers placed in an air-filled borehole. One system uses a metal-detecting tuned coil, and the other uses a video camera to locate themarkers.We compare themerits of the two systems. We combine steady-state calculations and a measured density profile to estimate the true vertical-velocity profile.This allows us to calculate a depth^age scale for the firn at Siple Dome. Our steady-state depth^age scale has ages 10^15 % younger at any given depth when compared to depth^age scales derived by layer counting in a core 40m away. The age of a visible ash layer at 97m in the core is 66530 years, in agreement with a similar analysis conducted atTaylor Dome, Antarctica, where the same ash is also seen, providing an additional dated tie point between the two cores. Text Antarc* Antarctica Unknown Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
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Open Polar |
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ftciteseerx |
language |
English |
description |
ABSTRACT. We measured vertical strain in the firn at Siple Dome, Antarctica, using two systems, both of which measure relative displacements over time of metal markers placed in an air-filled borehole. One system uses a metal-detecting tuned coil, and the other uses a video camera to locate themarkers.We compare themerits of the two systems. We combine steady-state calculations and a measured density profile to estimate the true vertical-velocity profile.This allows us to calculate a depth^age scale for the firn at Siple Dome. Our steady-state depth^age scale has ages 10^15 % younger at any given depth when compared to depth^age scales derived by layer counting in a core 40m away. The age of a visible ash layer at 97m in the core is 66530 years, in agreement with a similar analysis conducted atTaylor Dome, Antarctica, where the same ash is also seen, providing an additional dated tie point between the two cores. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Robert L. Hawley Edwin D. Waddington Greggw Lamorey |
spellingShingle |
Robert L. Hawley Edwin D. Waddington Greggw Lamorey Vertical-strain measurements in firn at Siple Dome, Antarctica |
author_facet |
Robert L. Hawley Edwin D. Waddington Greggw Lamorey |
author_sort |
Robert L. Hawley |
title |
Vertical-strain measurements in firn at Siple Dome, Antarctica |
title_short |
Vertical-strain measurements in firn at Siple Dome, Antarctica |
title_full |
Vertical-strain measurements in firn at Siple Dome, Antarctica |
title_fullStr |
Vertical-strain measurements in firn at Siple Dome, Antarctica |
title_full_unstemmed |
Vertical-strain measurements in firn at Siple Dome, Antarctica |
title_sort |
vertical-strain measurements in firn at siple dome, antarctica |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.1480 http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Siple Siple Dome |
geographic_facet |
Siple Siple Dome |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.1480 http://earthweb.ess.washington.edu/~bo/papers/vstrain/hawley_et_al2004.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766116413174448128 |