Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger
We report on a depth-dependent observation of a directional anisotropy in the recorded intensity of backscattered light as measured by an oriented laser dust logger. The measurement was performed in a drill hole at the geographic South Pole about a kilometer away from the IceCube Neutrino Observator...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-14-2537-2020 https://tc.copernicus.org/articles/14/2537/2020/ |
id |
ftcopernicus:oai:publications.copernicus.org:tc83208 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:tc83208 2023-05-15T16:39:15+02:00 Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger Rongen, Martin Bay, Ryan Carlton Blot, Summer 2020-08-03 application/pdf https://doi.org/10.5194/tc-14-2537-2020 https://tc.copernicus.org/articles/14/2537/2020/ eng eng doi:10.5194/tc-14-2537-2020 https://tc.copernicus.org/articles/14/2537/2020/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-14-2537-2020 2020-08-10T16:22:01Z We report on a depth-dependent observation of a directional anisotropy in the recorded intensity of backscattered light as measured by an oriented laser dust logger. The measurement was performed in a drill hole at the geographic South Pole about a kilometer away from the IceCube Neutrino Observatory. The drill hole has remained open for access since the SPICEcore collaboration retrieved a 1751 m ice core. We find the anisotropy axis of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">126</mn><mo>±</mo><mn mathvariant="normal">3</mn><msup><mi/><mo>∘</mo></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="42pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="cbdeda3b0f145ddea282300b6ef44b6d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-14-2537-2020-ie00001.svg" width="42pt" height="11pt" src="tc-14-2537-2020-ie00001.png"/></svg:svg> as measured below 1100 m to be compatible with the local flow direction. The observation is discussed in comparison to a similar anisotropy observed in data from the IceCube Neutrino Observatory and favors a birefringence-based scenario over previously suggested Mie-scattering-based explanations. In the future, the measurement principle, when combined with a full-chain simulation, may have the potential to provide a continuous record of fabric properties along the entire depth of a drill hole. Text ice core South pole Copernicus Publications: E-Journals South Pole The Cryosphere 14 8 2537 2543 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We report on a depth-dependent observation of a directional anisotropy in the recorded intensity of backscattered light as measured by an oriented laser dust logger. The measurement was performed in a drill hole at the geographic South Pole about a kilometer away from the IceCube Neutrino Observatory. The drill hole has remained open for access since the SPICEcore collaboration retrieved a 1751 m ice core. We find the anisotropy axis of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">126</mn><mo>±</mo><mn mathvariant="normal">3</mn><msup><mi/><mo>∘</mo></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="42pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="cbdeda3b0f145ddea282300b6ef44b6d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-14-2537-2020-ie00001.svg" width="42pt" height="11pt" src="tc-14-2537-2020-ie00001.png"/></svg:svg> as measured below 1100 m to be compatible with the local flow direction. The observation is discussed in comparison to a similar anisotropy observed in data from the IceCube Neutrino Observatory and favors a birefringence-based scenario over previously suggested Mie-scattering-based explanations. In the future, the measurement principle, when combined with a full-chain simulation, may have the potential to provide a continuous record of fabric properties along the entire depth of a drill hole. |
format |
Text |
author |
Rongen, Martin Bay, Ryan Carlton Blot, Summer |
spellingShingle |
Rongen, Martin Bay, Ryan Carlton Blot, Summer Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
author_facet |
Rongen, Martin Bay, Ryan Carlton Blot, Summer |
author_sort |
Rongen, Martin |
title |
Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
title_short |
Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
title_full |
Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
title_fullStr |
Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
title_full_unstemmed |
Observation of an optical anisotropy in the deep glacial ice at the geographic South Pole using a laser dust logger |
title_sort |
observation of an optical anisotropy in the deep glacial ice at the geographic south pole using a laser dust logger |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-2537-2020 https://tc.copernicus.org/articles/14/2537/2020/ |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
ice core South pole |
genre_facet |
ice core South pole |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-14-2537-2020 https://tc.copernicus.org/articles/14/2537/2020/ |
op_doi |
https://doi.org/10.5194/tc-14-2537-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
8 |
container_start_page |
2537 |
op_container_end_page |
2543 |
_version_ |
1766029582850326528 |