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 back-scattered 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 Observat...

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Bibliographic Details
Main Authors: Rongen, Martin, Bay, Ryan Carlton, Blot, Summer
Format: Text
Language:English
Published: 2020
Subjects:
South Pole
ice core
South pole
Online Access:https://doi.org/10.5194/tc-2020-34
https://tc.copernicus.org/preprints/tc-2020-34/
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spelling ftcopernicus:oai:publications.copernicus.org:tcd83208 2023-05-15T16:39:07+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 2020-03-11 application/pdf https://doi.org/10.5194/tc-2020-34 https://tc.copernicus.org/preprints/tc-2020-34/ eng eng doi:10.5194/tc-2020-34 https://tc.copernicus.org/preprints/tc-2020-34/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-2020-34 2020-07-20T16:22:21Z We report on a depth-dependent observation of a directional anisotropy in the recorded intensity of back-scattered 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 remains open for access, after the SPICEcore collaboration had retrieved a 1751 m ice core. We find the measured anisotropy axis of 126 ± 3° 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 is able to dismiss Mie scattering based explanations in favor of a birefringence based scenario. In the future, the measurement principle, when combined with a full-chain simulation, may be used 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
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 back-scattered 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 remains open for access, after the SPICEcore collaboration had retrieved a 1751 m ice core. We find the measured anisotropy axis of 126 ± 3° 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 is able to dismiss Mie scattering based explanations in favor of a birefringence based scenario. In the future, the measurement principle, when combined with a full-chain simulation, may be used 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-2020-34
https://tc.copernicus.org/preprints/tc-2020-34/
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-2020-34
https://tc.copernicus.org/preprints/tc-2020-34/
op_doi https://doi.org/10.5194/tc-2020-34
_version_ 1766029444997185536

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