Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic?
Measurements of underwater sound are still scarce in the rapidly changing Arctic. Tele-seismically detectable glacial earthquakes caused by iceberg calving have been known for nearly two decades but their underwater sound levels remain undocumented. Here, we present near-source underwater sound reco...
Published in: | The Journal of the Acoustical Society of America |
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Online Access: | http://hdl.handle.net/2115/86725 https://doi.org/10.1121/10.0009166 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/86725 2023-05-15T14:48:14+02:00 Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin http://hdl.handle.net/2115/86725 https://doi.org/10.1121/10.0009166 eng eng Acoustical Society of America http://hdl.handle.net/2115/86725 Journal of the acoustical society of America, 151(1): 6-16 http://dx.doi.org/10.1121/10.0009166 450 article fthokunivhus https://doi.org/10.1121/10.0009166 2022-11-18T01:07:06Z Measurements of underwater sound are still scarce in the rapidly changing Arctic. Tele-seismically detectable glacial earthquakes caused by iceberg calving have been known for nearly two decades but their underwater sound levels remain undocumented. Here, we present near-source underwater sound records from a kilometer-scale iceberg calving associated with a glacial earthquake. Records were obtained using an ocean-bottom lander deployed near the calving front of a Greenlandic tidewater Bowdoin Glacier in July 2019. An underwater-detonation-like signal with an overall duration of 30 min and two major phases owing to iceberg detachment and disintegration corresponded to extreme source sound levels (225 +/- 10 dB(p2p)( )re 1 mu Pa) and acoustic energy on the order of 10(8-)(10) J or 0.1-7.6 tonnes TNT-equivalent. Our estimates and comparison with other anthropogenic and natural sources suggest that this type of geophysical event is among the loudest sounds in the Arctic. Such high sound levels are important for estimating the noise budget of the ocean and possible impacts on endemic Arctic species exposed to such sounds. The sound of calving may cause direct mechanical damage to the hearing of marine mammals such as narwhals and seals present in the glacial fjord. (C) 2022 Author(s). Article in Journal/Newspaper Arctic greenlandic Iceberg* narwhal* Tidewater Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Bowdoin ENVELOPE(-69.317,-69.317,77.683,77.683) The Journal of the Acoustical Society of America 151 1 6 16 |
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Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
450 |
spellingShingle |
450 Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
topic_facet |
450 |
description |
Measurements of underwater sound are still scarce in the rapidly changing Arctic. Tele-seismically detectable glacial earthquakes caused by iceberg calving have been known for nearly two decades but their underwater sound levels remain undocumented. Here, we present near-source underwater sound records from a kilometer-scale iceberg calving associated with a glacial earthquake. Records were obtained using an ocean-bottom lander deployed near the calving front of a Greenlandic tidewater Bowdoin Glacier in July 2019. An underwater-detonation-like signal with an overall duration of 30 min and two major phases owing to iceberg detachment and disintegration corresponded to extreme source sound levels (225 +/- 10 dB(p2p)( )re 1 mu Pa) and acoustic energy on the order of 10(8-)(10) J or 0.1-7.6 tonnes TNT-equivalent. Our estimates and comparison with other anthropogenic and natural sources suggest that this type of geophysical event is among the loudest sounds in the Arctic. Such high sound levels are important for estimating the noise budget of the ocean and possible impacts on endemic Arctic species exposed to such sounds. The sound of calving may cause direct mechanical damage to the hearing of marine mammals such as narwhals and seals present in the glacial fjord. (C) 2022 Author(s). |
format |
Article in Journal/Newspaper |
author |
Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin |
author_facet |
Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin |
author_sort |
Podolskiy, Evgeny A. |
title |
Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
title_short |
Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
title_full |
Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
title_fullStr |
Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
title_full_unstemmed |
Glacial earthquake-generating iceberg calving in a narwhal summering ground : The loudest underwater sound in the Arctic? |
title_sort |
glacial earthquake-generating iceberg calving in a narwhal summering ground : the loudest underwater sound in the arctic? |
publisher |
Acoustical Society of America |
url |
http://hdl.handle.net/2115/86725 https://doi.org/10.1121/10.0009166 |
long_lat |
ENVELOPE(-69.317,-69.317,77.683,77.683) |
geographic |
Arctic Bowdoin |
geographic_facet |
Arctic Bowdoin |
genre |
Arctic greenlandic Iceberg* narwhal* Tidewater |
genre_facet |
Arctic greenlandic Iceberg* narwhal* Tidewater |
op_relation |
http://hdl.handle.net/2115/86725 Journal of the acoustical society of America, 151(1): 6-16 http://dx.doi.org/10.1121/10.0009166 |
op_doi |
https://doi.org/10.1121/10.0009166 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
151 |
container_issue |
1 |
container_start_page |
6 |
op_container_end_page |
16 |
_version_ |
1766319322953678848 |