AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun
Manuscript. Published version available in ICES J Mar Sci 2016 fsw158. doi:10.1093/icesjms/fsw158 An autonomous underwater vehicle (AUV) carrying 614 kHz RDI acoustic doppler current profilers (ADCPs) was deployed at four locations over the West Spitsbergen outer shelf in July 2010. The backscatter...
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Online Access: | https://hdl.handle.net/10037/10599 https://doi.org/10.1093/icesjms/fsw158 |
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ftunivtroemsoe:oai:munin.uit.no:10037/10599 2023-05-15T14:27:59+02:00 AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun Geoffroy, Maxime Cottier, Finlo Robert Berge, Jørgen Inall, Mark E. 2016-09-28 https://hdl.handle.net/10037/10599 https://doi.org/10.1093/icesjms/fsw158 eng eng Oxford University Press ICES Journal of Marine Science info:eu-repo/grantAgreement/RCN/SFF/223254/Norway/Centre for Autonomous Marine Operations and Systems/AMOS info:eu-repo/grantAgreement/RCN/POLARPROG/244319/Norway/Arctic Ocean ecosystems - Applied technology, Biological interactions and Consequences in an era of abrupt climate change info:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night Maxime Geoffroy, Finlo R. Cottier, Jørgen Berge, Mark E. Inall; AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun. ICES J Mar Sci 2016 fsw158. doi:10.1093/icesjms/fsw158 FRIDAID 1395531 doi:10.1093/icesjms/fsw158 1054-3139 1095-9289 https://hdl.handle.net/10037/10599 openAccess VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Journal article Tidsskriftartikkel Peer reviewed 2016 ftunivtroemsoe https://doi.org/10.1093/icesjms/fsw158 2021-06-25T17:55:06Z Manuscript. Published version available in ICES J Mar Sci 2016 fsw158. doi:10.1093/icesjms/fsw158 An autonomous underwater vehicle (AUV) carrying 614 kHz RDI acoustic doppler current profilers (ADCPs) was deployed at four locations over the West Spitsbergen outer shelf in July 2010. The backscatter signal recorded by the ADCPs was extracted and analysed to investigate the vertical distribution and patchiness of pelagic organisms during midnight sun. At the northernmost locations (Norskebanken and Woodfjorden), fresher and colder water prevailed in the surface layer (0–20 m) and scatterers (interpreted as zooplankton and micronekton) were mainly distributed below the pycnocline. In contrast, more saline and warmer Atlantic Water dominated the surface layer at Kongsfjordbanken and Isfjordbanken and scatterers were concentrated in the top 20 m, above the pycnocline. Pelagic scatterers formed patchy aggregations at all locations, but patchiness generally increased with the density of organisms and decreased at depths >80 m. This study contributes to our understanding of the vertical distribution of pelagic organisms in the Arctic, and the spatial coverage of the AUV has extended early acoustic studies limited to Arctic fjords from 1D observations to a broader offshore coverage. Neither synchronized nor unsynchronized vertical migrations were detected, but autonomous vehicles with limited autonomy (<1 day) may not be as effective as long-term mooring deployments or long-range AUVs to study vertical migrations. Short-term AUV-based acoustic surveys of the pelagic communities are nonetheless highly complementary to Eulerian studies, in particular by providing spatial measurements of patchiness. Compared with ship-based or moored acoustic instruments, the 3D trajectory of AUVs also allows using acoustic instruments with higher frequencies and better size resolution, as well as the detection of organisms closer to the surface. Article in Journal/Newspaper Arctic Arctic Isfjord* Kongsfjord* Woodfjord* Woodfjorden Zooplankton midnight sun Spitsbergen University of Tromsø: Munin Open Research Archive Arctic Isfjordbanken ENVELOPE(11.000,11.000,77.833,77.833) Norskebanken ENVELOPE(13.500,13.500,80.167,80.167) Woodfjorden ENVELOPE(14.000,14.000,79.833,79.833) ICES Journal of Marine Science 74 9 2342 2353 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Geoffroy, Maxime Cottier, Finlo Robert Berge, Jørgen Inall, Mark E. AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
Manuscript. Published version available in ICES J Mar Sci 2016 fsw158. doi:10.1093/icesjms/fsw158 An autonomous underwater vehicle (AUV) carrying 614 kHz RDI acoustic doppler current profilers (ADCPs) was deployed at four locations over the West Spitsbergen outer shelf in July 2010. The backscatter signal recorded by the ADCPs was extracted and analysed to investigate the vertical distribution and patchiness of pelagic organisms during midnight sun. At the northernmost locations (Norskebanken and Woodfjorden), fresher and colder water prevailed in the surface layer (0–20 m) and scatterers (interpreted as zooplankton and micronekton) were mainly distributed below the pycnocline. In contrast, more saline and warmer Atlantic Water dominated the surface layer at Kongsfjordbanken and Isfjordbanken and scatterers were concentrated in the top 20 m, above the pycnocline. Pelagic scatterers formed patchy aggregations at all locations, but patchiness generally increased with the density of organisms and decreased at depths >80 m. This study contributes to our understanding of the vertical distribution of pelagic organisms in the Arctic, and the spatial coverage of the AUV has extended early acoustic studies limited to Arctic fjords from 1D observations to a broader offshore coverage. Neither synchronized nor unsynchronized vertical migrations were detected, but autonomous vehicles with limited autonomy (<1 day) may not be as effective as long-term mooring deployments or long-range AUVs to study vertical migrations. Short-term AUV-based acoustic surveys of the pelagic communities are nonetheless highly complementary to Eulerian studies, in particular by providing spatial measurements of patchiness. Compared with ship-based or moored acoustic instruments, the 3D trajectory of AUVs also allows using acoustic instruments with higher frequencies and better size resolution, as well as the detection of organisms closer to the surface. |
format |
Article in Journal/Newspaper |
author |
Geoffroy, Maxime Cottier, Finlo Robert Berge, Jørgen Inall, Mark E. |
author_facet |
Geoffroy, Maxime Cottier, Finlo Robert Berge, Jørgen Inall, Mark E. |
author_sort |
Geoffroy, Maxime |
title |
AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
title_short |
AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
title_full |
AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
title_fullStr |
AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
title_full_unstemmed |
AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
title_sort |
auv-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
https://hdl.handle.net/10037/10599 https://doi.org/10.1093/icesjms/fsw158 |
long_lat |
ENVELOPE(11.000,11.000,77.833,77.833) ENVELOPE(13.500,13.500,80.167,80.167) ENVELOPE(14.000,14.000,79.833,79.833) |
geographic |
Arctic Isfjordbanken Norskebanken Woodfjorden |
geographic_facet |
Arctic Isfjordbanken Norskebanken Woodfjorden |
genre |
Arctic Arctic Isfjord* Kongsfjord* Woodfjord* Woodfjorden Zooplankton midnight sun Spitsbergen |
genre_facet |
Arctic Arctic Isfjord* Kongsfjord* Woodfjord* Woodfjorden Zooplankton midnight sun Spitsbergen |
op_relation |
ICES Journal of Marine Science info:eu-repo/grantAgreement/RCN/SFF/223254/Norway/Centre for Autonomous Marine Operations and Systems/AMOS info:eu-repo/grantAgreement/RCN/POLARPROG/244319/Norway/Arctic Ocean ecosystems - Applied technology, Biological interactions and Consequences in an era of abrupt climate change info:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night Maxime Geoffroy, Finlo R. Cottier, Jørgen Berge, Mark E. Inall; AUV-based acoustic observations of the distribution and patchiness of pelagic scattering layers during midnight sun. ICES J Mar Sci 2016 fsw158. doi:10.1093/icesjms/fsw158 FRIDAID 1395531 doi:10.1093/icesjms/fsw158 1054-3139 1095-9289 https://hdl.handle.net/10037/10599 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsw158 |
container_title |
ICES Journal of Marine Science |
container_volume |
74 |
container_issue |
9 |
container_start_page |
2342 |
op_container_end_page |
2353 |
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1766302106944274432 |