Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation
Air bubble penetration depths are investigated with a bottom‐mounted echosounder at a seabed observatory in northern Norway. We compare a 1‐year time series of observed bubble depth against modeled and estimated turbulent kinetic energy flux from breaking waves as well as wind speed and sea state. W...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hdl.handle.net/11250/2683098 https://doi.org/10.1029/2019JC015906 |
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ftimr:oai:imr.brage.unit.no:11250/2683098 2024-09-09T19:59:28+00:00 Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation Strand, Kjersti Opstad Breivik, Øyvind Pedersen, Geir Vikebø, Frode Bendiksen Sundby, Svein Christensen, Kai Håkon 2020 application/pdf https://hdl.handle.net/11250/2683098 https://doi.org/10.1029/2019JC015906 eng eng SIVA: 237906 Norges forskningsråd: 244262 Journal of Geophysical Research (JGR): Space Physics. 2020, 125 (2), . urn:issn:2169-9380 https://hdl.handle.net/11250/2683098 https://doi.org/10.1029/2019JC015906 cristin:1819881 14 125 Journal of Geophysical Research (JGR): Space Physics 2 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1029/2019JC015906 2024-07-31T03:37:25Z Air bubble penetration depths are investigated with a bottom‐mounted echosounder at a seabed observatory in northern Norway. We compare a 1‐year time series of observed bubble depth against modeled and estimated turbulent kinetic energy flux from breaking waves as well as wind speed and sea state. We find that the hourly mean and maximum bubble depths are highly variable, reaching 18 and 38 m, respectively, and strongly correlated with wind and sea state. The bubble depth is shallowest during summer following the seasonal variations in wind speed and wave height. Summertime shallowing of the mixed layer depth is not limiting the penetration depth. A strong relationship between bubble depth and modeled turbulent kinetic energy flux from breaking waves is found, similar in strength to the relationship between bubble depth and wind speed. The wind sea is more strongly correlated with bubble depth than the total significant wave height, and the swell is only weakly correlated, suggesting that the wave model does a reasonable separation of swell and wind sea. publishedVersion Article in Journal/Newspaper Northern Norway Institute for Marine Research: Brage IMR Norway Journal of Geophysical Research: Oceans 125 2 |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Air bubble penetration depths are investigated with a bottom‐mounted echosounder at a seabed observatory in northern Norway. We compare a 1‐year time series of observed bubble depth against modeled and estimated turbulent kinetic energy flux from breaking waves as well as wind speed and sea state. We find that the hourly mean and maximum bubble depths are highly variable, reaching 18 and 38 m, respectively, and strongly correlated with wind and sea state. The bubble depth is shallowest during summer following the seasonal variations in wind speed and wave height. Summertime shallowing of the mixed layer depth is not limiting the penetration depth. A strong relationship between bubble depth and modeled turbulent kinetic energy flux from breaking waves is found, similar in strength to the relationship between bubble depth and wind speed. The wind sea is more strongly correlated with bubble depth than the total significant wave height, and the swell is only weakly correlated, suggesting that the wave model does a reasonable separation of swell and wind sea. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Strand, Kjersti Opstad Breivik, Øyvind Pedersen, Geir Vikebø, Frode Bendiksen Sundby, Svein Christensen, Kai Håkon |
spellingShingle |
Strand, Kjersti Opstad Breivik, Øyvind Pedersen, Geir Vikebø, Frode Bendiksen Sundby, Svein Christensen, Kai Håkon Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
author_facet |
Strand, Kjersti Opstad Breivik, Øyvind Pedersen, Geir Vikebø, Frode Bendiksen Sundby, Svein Christensen, Kai Håkon |
author_sort |
Strand, Kjersti Opstad |
title |
Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
title_short |
Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
title_full |
Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
title_fullStr |
Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
title_full_unstemmed |
Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation |
title_sort |
long-term statistics of observed bubble depth versus modeled wave dissipation |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2683098 https://doi.org/10.1029/2019JC015906 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
14 125 Journal of Geophysical Research (JGR): Space Physics 2 |
op_relation |
SIVA: 237906 Norges forskningsråd: 244262 Journal of Geophysical Research (JGR): Space Physics. 2020, 125 (2), . urn:issn:2169-9380 https://hdl.handle.net/11250/2683098 https://doi.org/10.1029/2019JC015906 cristin:1819881 |
op_doi |
https://doi.org/10.1029/2019JC015906 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
2 |
_version_ |
1809930590396350464 |