Distinguishing subaerial and submarine calving with underwater noise
Iceberg calving is one of the major mechanisms of ice loss from tidewater glaciers and ice sheets, but obtaining accurate estimates of ice discharge that are both continuous and accurate is a challenging task. Recent results have demonstrated the effective application of passive cryoacoustics – the...
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Cambridge University Press
2022
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ftdoajarticles:oai:doaj.org/article:d9f39f2f1fae41f7b895c555e343e68c 2023-05-15T15:07:59+02:00 Distinguishing subaerial and submarine calving with underwater noise Oskar Glowacki 2022-12-01T00:00:00Z https://doi.org/10.1017/jog.2022.32 https://doaj.org/article/d9f39f2f1fae41f7b895c555e343e68c EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000326/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.32 0022-1430 1727-5652 https://doaj.org/article/d9f39f2f1fae41f7b895c555e343e68c Journal of Glaciology, Vol 68, Pp 1185-1196 (2022) Arctic glaciology calving glacier calving iceberg calving ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2022 ftdoajarticles https://doi.org/10.1017/jog.2022.32 2023-03-12T01:30:54Z Iceberg calving is one of the major mechanisms of ice loss from tidewater glaciers and ice sheets, but obtaining accurate estimates of ice discharge that are both continuous and accurate is a challenging task. Recent results have demonstrated the effective application of passive cryoacoustics – the use of naturally generated sounds to study the cryosphere – to quantify subaerial calving fluxes. However, little is known about the acoustic signatures of submarine calving. This study investigates the underwater noise from 656 subaerial and 162 submarine calving events observed at Hansbreen, Svalbard in the summers of 2016 and 2017. Statistical analysis of the acoustic signal shows that the normalized power of the calving noise is log-normally distributed regardless of the calving mode. However, submarine events can be distinguished from subaerial events by using the shape parameter of the log-normal distribution paired with the calving signal duration. The newly developed classification model may potentially be used for two purposes: (1) to study potential causal relationships between these two calving modes and (2) to separate calving fluxes into subaerial and submarine components. The latter will also require knowledge of the relationship between ice mass and sound spectral level for submarine calving events. Article in Journal/Newspaper Arctic glacier Iceberg* Journal of Glaciology Svalbard Tidewater Directory of Open Access Journals: DOAJ Articles Arctic Hansbreen ENVELOPE(15.650,15.650,77.075,77.075) Svalbard Journal of Glaciology 68 272 1185 1196 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology calving glacier calving iceberg calving ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology calving glacier calving iceberg calving ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Oskar Glowacki Distinguishing subaerial and submarine calving with underwater noise |
topic_facet |
Arctic glaciology calving glacier calving iceberg calving ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Iceberg calving is one of the major mechanisms of ice loss from tidewater glaciers and ice sheets, but obtaining accurate estimates of ice discharge that are both continuous and accurate is a challenging task. Recent results have demonstrated the effective application of passive cryoacoustics – the use of naturally generated sounds to study the cryosphere – to quantify subaerial calving fluxes. However, little is known about the acoustic signatures of submarine calving. This study investigates the underwater noise from 656 subaerial and 162 submarine calving events observed at Hansbreen, Svalbard in the summers of 2016 and 2017. Statistical analysis of the acoustic signal shows that the normalized power of the calving noise is log-normally distributed regardless of the calving mode. However, submarine events can be distinguished from subaerial events by using the shape parameter of the log-normal distribution paired with the calving signal duration. The newly developed classification model may potentially be used for two purposes: (1) to study potential causal relationships between these two calving modes and (2) to separate calving fluxes into subaerial and submarine components. The latter will also require knowledge of the relationship between ice mass and sound spectral level for submarine calving events. |
format |
Article in Journal/Newspaper |
author |
Oskar Glowacki |
author_facet |
Oskar Glowacki |
author_sort |
Oskar Glowacki |
title |
Distinguishing subaerial and submarine calving with underwater noise |
title_short |
Distinguishing subaerial and submarine calving with underwater noise |
title_full |
Distinguishing subaerial and submarine calving with underwater noise |
title_fullStr |
Distinguishing subaerial and submarine calving with underwater noise |
title_full_unstemmed |
Distinguishing subaerial and submarine calving with underwater noise |
title_sort |
distinguishing subaerial and submarine calving with underwater noise |
publisher |
Cambridge University Press |
publishDate |
2022 |
url |
https://doi.org/10.1017/jog.2022.32 https://doaj.org/article/d9f39f2f1fae41f7b895c555e343e68c |
long_lat |
ENVELOPE(15.650,15.650,77.075,77.075) |
geographic |
Arctic Hansbreen Svalbard |
geographic_facet |
Arctic Hansbreen Svalbard |
genre |
Arctic glacier Iceberg* Journal of Glaciology Svalbard Tidewater |
genre_facet |
Arctic glacier Iceberg* Journal of Glaciology Svalbard Tidewater |
op_source |
Journal of Glaciology, Vol 68, Pp 1185-1196 (2022) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000326/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.32 0022-1430 1727-5652 https://doaj.org/article/d9f39f2f1fae41f7b895c555e343e68c |
op_doi |
https://doi.org/10.1017/jog.2022.32 |
container_title |
Journal of Glaciology |
container_volume |
68 |
container_issue |
272 |
container_start_page |
1185 |
op_container_end_page |
1196 |
_version_ |
1766339421903257600 |