Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements
Frontal ablation contributes significantly to the mass balance of tidewater glaciers in Svalbard and can be recovered with high temporal resolution using continuous seismic records. Determination of the relative contribution of dynamic ice loss through calving to frontal ablation requires precise es...
Published in: | The Cryosphere |
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Copernicus Publications
2019
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00049565 2023-05-15T16:22:11+02:00 Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements Köhler, Andreas Pętlicki, Michał Lefeuvre, Pierre-Marie Buscaino, Giuseppa Nuth, Christopher Weidle, Christian 2019-11 electronic https://doi.org/10.5194/tc-13-3117-2019 https://noa.gwlb.de/receive/cop_mods_00049565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049184/tc-13-3117-2019.pdf https://tc.copernicus.org/articles/13/3117/2019/tc-13-3117-2019.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-13-3117-2019 https://noa.gwlb.de/receive/cop_mods_00049565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049184/tc-13-3117-2019.pdf https://tc.copernicus.org/articles/13/3117/2019/tc-13-3117-2019.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2019 ftnonlinearchiv https://doi.org/10.5194/tc-13-3117-2019 2022-02-08T22:37:16Z Frontal ablation contributes significantly to the mass balance of tidewater glaciers in Svalbard and can be recovered with high temporal resolution using continuous seismic records. Determination of the relative contribution of dynamic ice loss through calving to frontal ablation requires precise estimates of calving volumes at the same temporal resolution. We combine seismic and hydroacoustic observations close to the calving front of Kronebreen, a marine-terminating glacier in Svalbard, with repeat lidar scanning of the glacier front. Simultaneous time-lapse photography is used to assign volumes measured from lidar scans to seismically detected calving events. Empirical models derived from signal properties such as integrated amplitude are able to replicate volumes of individual calving events and cumulative subaerial ice loss over different lidar scan intervals from seismic and hydroacoustic data alone. This enables quantification of the contribution of calving to frontal ablation, which we estimate for Kronebreen to be about 18 %–30 %, slightly below the subaerially exposed area of the glacier front. We further develop a model calibrated for the permanent seismic Kings Bay station (KBS) at about 15 km distance from the glacier front, where 15 %–60 % of calving events can be detected under variable noise conditions due to reduced signal amplitudes at distance. Between 2007 and 2017, we find a 5 %–30 % contribution of calving ice blocks to frontal ablation, which emphasizes the importance of underwater melting (roughly 4–9 m d−1). This study shows the feasibility to seismically monitor not only frontal ablation rates but also the dynamic ice loss contribution continuously and at high temporal resolution. Article in Journal/Newspaper glacier Svalbard The Cryosphere Tidewater Niedersächsisches Online-Archiv NOA Svalbard Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Kings Bay ENVELOPE(-117.760,-117.760,70.731,70.731) The Cryosphere 13 11 3117 3137 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Köhler, Andreas Pętlicki, Michał Lefeuvre, Pierre-Marie Buscaino, Giuseppa Nuth, Christopher Weidle, Christian Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
Frontal ablation contributes significantly to the mass balance of tidewater glaciers in Svalbard and can be recovered with high temporal resolution using continuous seismic records. Determination of the relative contribution of dynamic ice loss through calving to frontal ablation requires precise estimates of calving volumes at the same temporal resolution. We combine seismic and hydroacoustic observations close to the calving front of Kronebreen, a marine-terminating glacier in Svalbard, with repeat lidar scanning of the glacier front. Simultaneous time-lapse photography is used to assign volumes measured from lidar scans to seismically detected calving events. Empirical models derived from signal properties such as integrated amplitude are able to replicate volumes of individual calving events and cumulative subaerial ice loss over different lidar scan intervals from seismic and hydroacoustic data alone. This enables quantification of the contribution of calving to frontal ablation, which we estimate for Kronebreen to be about 18 %–30 %, slightly below the subaerially exposed area of the glacier front. We further develop a model calibrated for the permanent seismic Kings Bay station (KBS) at about 15 km distance from the glacier front, where 15 %–60 % of calving events can be detected under variable noise conditions due to reduced signal amplitudes at distance. Between 2007 and 2017, we find a 5 %–30 % contribution of calving ice blocks to frontal ablation, which emphasizes the importance of underwater melting (roughly 4–9 m d−1). This study shows the feasibility to seismically monitor not only frontal ablation rates but also the dynamic ice loss contribution continuously and at high temporal resolution. |
format |
Article in Journal/Newspaper |
author |
Köhler, Andreas Pętlicki, Michał Lefeuvre, Pierre-Marie Buscaino, Giuseppa Nuth, Christopher Weidle, Christian |
author_facet |
Köhler, Andreas Pętlicki, Michał Lefeuvre, Pierre-Marie Buscaino, Giuseppa Nuth, Christopher Weidle, Christian |
author_sort |
Köhler, Andreas |
title |
Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
title_short |
Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
title_full |
Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
title_fullStr |
Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
title_full_unstemmed |
Contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
title_sort |
contribution of calving to frontal ablation quantified from seismic and hydroacoustic observations calibrated with lidar volume measurements |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-3117-2019 https://noa.gwlb.de/receive/cop_mods_00049565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049184/tc-13-3117-2019.pdf https://tc.copernicus.org/articles/13/3117/2019/tc-13-3117-2019.pdf |
long_lat |
ENVELOPE(13.333,13.333,78.833,78.833) ENVELOPE(-117.760,-117.760,70.731,70.731) |
geographic |
Svalbard Kronebreen Kings Bay |
geographic_facet |
Svalbard Kronebreen Kings Bay |
genre |
glacier Svalbard The Cryosphere Tidewater |
genre_facet |
glacier Svalbard The Cryosphere Tidewater |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-13-3117-2019 https://noa.gwlb.de/receive/cop_mods_00049565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049184/tc-13-3117-2019.pdf https://tc.copernicus.org/articles/13/3117/2019/tc-13-3117-2019.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-13-3117-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
11 |
container_start_page |
3117 |
op_container_end_page |
3137 |
_version_ |
1766010156531843072 |