Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula
Arrays of hydrophones were deployed within the Bransfield Strait and Scotia Sea (Antarctic Peninsula region) from 2005 to 2009 to record ambient ocean sound at frequencies of up to 125 and 500 Hz. Icequakes, which are broadband, short duration signals derived from fracturing of large free-floating i...
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ftoregonstate:ir.library.oregonstate.edu:ng451k32p 2024-04-14T08:04:25+00:00 Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula Dziak, Robert P. Bohnenstiehl, DelWayne R. Stafford, Kathleen M. Matsumoto, Haruyoshi Park, Minkyu Lee, Won Sang Fowler, Matt J. Lau, Tai-Kwan Haxel, Joseph H. Mellinger, David K. https://ir.library.oregonstate.edu/concern/articles/ng451k32p English [eng] eng unknown Public of Library Science https://ir.library.oregonstate.edu/concern/articles/ng451k32p In Copyright Article ftoregonstate 2024-03-21T15:49:07Z Arrays of hydrophones were deployed within the Bransfield Strait and Scotia Sea (Antarctic Peninsula region) from 2005 to 2009 to record ambient ocean sound at frequencies of up to 125 and 500 Hz. Icequakes, which are broadband, short duration signals derived from fracturing of large free-floating icebergs, are a prominent feature of the ocean soundscape. Ice quake activity peaks during austral summer and is minimum during winter, likely following freeze-thaw cycles. Iceberg grounding and rapid disintegration also releases significant acoustic energy, equivalent to large-scale geophysical events. Overall ambient sound levels can be as much as ≈10-20 dB higher in the open, deep ocean of the Scotia Sea compared to the relatively shallow Bransfield Strait. Noise levels become lowest during the austral winter, as sea-ice cover suppresses wind and wave noise. Ambient noise levels are highest during austral spring and summer, as surface noise, ice cracking and biological activity intensifies. Vocalizations of blue (Balaenoptera musculus) and fin (B. physalus) whales also dominate the long-term spectra records in the 15-28 and 89 Hz bands. Blue whale call energy is a maximum during austral summer-fall in the Drake Passage and Bransfield Strait when ambient noise levels are a maximum and sea-ice cover is a minimum. Fin whale vocalizations were also most common during austral summer-early fall months in both the Bransfield Strait and Scotia Sea. The hydrophone data overall do not show sustained anthropogenic sources (ships and airguns), likely due to low coastal traffic and the typically rough weather and sea conditions of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Bransfield Strait Drake Passage Fin whale Iceberg* Scotia Sea Sea ice Southern Ocean ScholarsArchive@OSU (Oregon State University) Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Drake Passage Scotia Sea Bransfield Strait |
institution |
Open Polar |
collection |
ScholarsArchive@OSU (Oregon State University) |
op_collection_id |
ftoregonstate |
language |
English unknown |
description |
Arrays of hydrophones were deployed within the Bransfield Strait and Scotia Sea (Antarctic Peninsula region) from 2005 to 2009 to record ambient ocean sound at frequencies of up to 125 and 500 Hz. Icequakes, which are broadband, short duration signals derived from fracturing of large free-floating icebergs, are a prominent feature of the ocean soundscape. Ice quake activity peaks during austral summer and is minimum during winter, likely following freeze-thaw cycles. Iceberg grounding and rapid disintegration also releases significant acoustic energy, equivalent to large-scale geophysical events. Overall ambient sound levels can be as much as ≈10-20 dB higher in the open, deep ocean of the Scotia Sea compared to the relatively shallow Bransfield Strait. Noise levels become lowest during the austral winter, as sea-ice cover suppresses wind and wave noise. Ambient noise levels are highest during austral spring and summer, as surface noise, ice cracking and biological activity intensifies. Vocalizations of blue (Balaenoptera musculus) and fin (B. physalus) whales also dominate the long-term spectra records in the 15-28 and 89 Hz bands. Blue whale call energy is a maximum during austral summer-fall in the Drake Passage and Bransfield Strait when ambient noise levels are a maximum and sea-ice cover is a minimum. Fin whale vocalizations were also most common during austral summer-early fall months in both the Bransfield Strait and Scotia Sea. The hydrophone data overall do not show sustained anthropogenic sources (ships and airguns), likely due to low coastal traffic and the typically rough weather and sea conditions of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Dziak, Robert P. Bohnenstiehl, DelWayne R. Stafford, Kathleen M. Matsumoto, Haruyoshi Park, Minkyu Lee, Won Sang Fowler, Matt J. Lau, Tai-Kwan Haxel, Joseph H. Mellinger, David K. |
spellingShingle |
Dziak, Robert P. Bohnenstiehl, DelWayne R. Stafford, Kathleen M. Matsumoto, Haruyoshi Park, Minkyu Lee, Won Sang Fowler, Matt J. Lau, Tai-Kwan Haxel, Joseph H. Mellinger, David K. Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
author_facet |
Dziak, Robert P. Bohnenstiehl, DelWayne R. Stafford, Kathleen M. Matsumoto, Haruyoshi Park, Minkyu Lee, Won Sang Fowler, Matt J. Lau, Tai-Kwan Haxel, Joseph H. Mellinger, David K. |
author_sort |
Dziak, Robert P. |
title |
Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
title_short |
Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
title_full |
Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
title_fullStr |
Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
title_full_unstemmed |
Sources and Levels of Ambient Ocean Sound near the Antarctic Peninsula |
title_sort |
sources and levels of ambient ocean sound near the antarctic peninsula |
publisher |
Public of Library Science |
url |
https://ir.library.oregonstate.edu/concern/articles/ng451k32p |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Drake Passage Scotia Sea Bransfield Strait |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Drake Passage Scotia Sea Bransfield Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Bransfield Strait Drake Passage Fin whale Iceberg* Scotia Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Bransfield Strait Drake Passage Fin whale Iceberg* Scotia Sea Sea ice Southern Ocean |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/ng451k32p |
op_rights |
In Copyright |
_version_ |
1796300920621891584 |