Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR
Abstract The production of meltwater from glacier ice, which is exposed at the margins of land ice during the summer, is responsible for a large proportion of glacier mass loss. The rate of meltwater production from glacier ice is especially sensitive to its physical structure and chemical compositi...
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Online Access: | http://dx.doi.org/10.1017/jog.2022.34 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200034X |
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crcambridgeupr:10.1017/jog.2022.34 2024-03-03T08:46:08+00:00 Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR Allgaier, Markus Cooper, Matthew G. Carlson, Anders E. Cooley, Sarah W. Ryan, Jonathan C. Smith, Brian J. University of Oregon 2022 http://dx.doi.org/10.1017/jog.2022.34 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200034X en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 68, issue 272, page 1210-1220 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2022 crcambridgeupr https://doi.org/10.1017/jog.2022.34 2024-02-08T08:28:33Z Abstract The production of meltwater from glacier ice, which is exposed at the margins of land ice during the summer, is responsible for a large proportion of glacier mass loss. The rate of meltwater production from glacier ice is especially sensitive to its physical structure and chemical composition which combine to determine the albedo of glacier ice. However, the optical properties of near-surface glacier ice are not well known since most prior work has focused on laboratory-grown ice or deep cores. Here, we demonstrate a measurement technique based on diffuse propagation of nanosecond-duration laser pulses in near-surface glacier ice that enables the independent measurement of the scattering and absorption coefficients, allowing for a complete description of the processes governing radiative transfer. We employ a photon-counting detector to overcome the high losses associated with diffuse optics. The instrument is highly portable and rugged, making it optimally suited for deployment in remote regions. A set of measurements taken on Crook and Collier Glaciers, Oregon, serves as a demonstration of the technique. These measurements provide insight into both physical structure and composition of near-surface glacier ice and open new avenues for the analysis of light-absorbing impurities and remote sensing of the cryosphere. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Collier ENVELOPE(-61.864,-61.864,-70.221,-70.221) Journal of Glaciology 1 11 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Allgaier, Markus Cooper, Matthew G. Carlson, Anders E. Cooley, Sarah W. Ryan, Jonathan C. Smith, Brian J. Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
topic_facet |
Earth-Surface Processes |
description |
Abstract The production of meltwater from glacier ice, which is exposed at the margins of land ice during the summer, is responsible for a large proportion of glacier mass loss. The rate of meltwater production from glacier ice is especially sensitive to its physical structure and chemical composition which combine to determine the albedo of glacier ice. However, the optical properties of near-surface glacier ice are not well known since most prior work has focused on laboratory-grown ice or deep cores. Here, we demonstrate a measurement technique based on diffuse propagation of nanosecond-duration laser pulses in near-surface glacier ice that enables the independent measurement of the scattering and absorption coefficients, allowing for a complete description of the processes governing radiative transfer. We employ a photon-counting detector to overcome the high losses associated with diffuse optics. The instrument is highly portable and rugged, making it optimally suited for deployment in remote regions. A set of measurements taken on Crook and Collier Glaciers, Oregon, serves as a demonstration of the technique. These measurements provide insight into both physical structure and composition of near-surface glacier ice and open new avenues for the analysis of light-absorbing impurities and remote sensing of the cryosphere. |
author2 |
University of Oregon |
format |
Article in Journal/Newspaper |
author |
Allgaier, Markus Cooper, Matthew G. Carlson, Anders E. Cooley, Sarah W. Ryan, Jonathan C. Smith, Brian J. |
author_facet |
Allgaier, Markus Cooper, Matthew G. Carlson, Anders E. Cooley, Sarah W. Ryan, Jonathan C. Smith, Brian J. |
author_sort |
Allgaier, Markus |
title |
Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
title_short |
Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
title_full |
Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
title_fullStr |
Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
title_full_unstemmed |
Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR |
title_sort |
direct measurement of optical properties of glacier ice using a photon-counting diffuse lidar |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/jog.2022.34 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200034X |
long_lat |
ENVELOPE(-61.864,-61.864,-70.221,-70.221) |
geographic |
Collier |
geographic_facet |
Collier |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 68, issue 272, page 1210-1220 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.34 |
container_title |
Journal of Glaciology |
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1 |
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11 |
_version_ |
1792502084182999040 |