Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF
Records of backscatter and vertical velocity obtained from moored Acoustic Doppler Current Profilers (ADCP) enabled new insights into the dynamics of deep scattering layers (DSLs) and diel vertical migration (DVM) of mesopelagic biomass between these deep layers and the near-surface photic zone in t...
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ftfrontimediafig:oai:figshare.com:article/13554500 2023-05-15T17:47:02+02:00 Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF Boris Cisewski Hjálmar Hátún Inga Kristiansen Bogi Hansen Karin Margretha H. Larsen Sólvá Káradóttir Eliasen Jan Arge Jacobsen 2021-01-11T16:22:32Z https://doi.org/10.3389/fmars.2020.542386.s002 https://figshare.com/articles/figure/Image_1_Vertical_Migration_of_Pelagic_and_Mesopelagic_Scatterers_From_ADCP_Backscatter_Data_in_the_Southern_Norwegian_Sea_TIF/13554500 unknown doi:10.3389/fmars.2020.542386.s002 https://figshare.com/articles/figure/Image_1_Vertical_Migration_of_Pelagic_and_Mesopelagic_Scatterers_From_ADCP_Backscatter_Data_in_the_Southern_Norwegian_Sea_TIF/13554500 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diel vertical migration ADCP backscatter seasonal cycles deep scattering layer Southern Norwegian Sea mesopelagic fish zooplankton Image Figure 2021 ftfrontimediafig https://doi.org/10.3389/fmars.2020.542386.s002 2021-01-13T23:58:27Z Records of backscatter and vertical velocity obtained from moored Acoustic Doppler Current Profilers (ADCP) enabled new insights into the dynamics of deep scattering layers (DSLs) and diel vertical migration (DVM) of mesopelagic biomass between these deep layers and the near-surface photic zone in the southern Norwegian Sea. The DSL exhibits characteristic vertical movement on inter-monthly time scales, which is associated with undulations of the main pycnocline between the warm Atlantic water and the underlying colder water masses. Timing of the DVM is closely linked to the day-night light cycle—decent from the photic zone just before sunrise and ascent immediately after sunset. Seasonal variations are also evident, with the highest DVM activity and lowest depth averaged mean volume backscatter strength (MVBS) during spring. This suggests that both oceanographic and optical conditions are driving the complex dynamics of pelagic and mesopelagic activity in this region. We hypothesize that the increased abundance of calanoid copepods in the near-surface layer during spring increases the motivation for vertical migration of pelagic and mesopelagic species, which therefore can explain the increased DVM activity during this season. Still Image Norwegian Sea Copepods Frontiers: Figshare Norwegian Sea |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diel vertical migration ADCP backscatter seasonal cycles deep scattering layer Southern Norwegian Sea mesopelagic fish zooplankton |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diel vertical migration ADCP backscatter seasonal cycles deep scattering layer Southern Norwegian Sea mesopelagic fish zooplankton Boris Cisewski Hjálmar Hátún Inga Kristiansen Bogi Hansen Karin Margretha H. Larsen Sólvá Káradóttir Eliasen Jan Arge Jacobsen Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diel vertical migration ADCP backscatter seasonal cycles deep scattering layer Southern Norwegian Sea mesopelagic fish zooplankton |
description |
Records of backscatter and vertical velocity obtained from moored Acoustic Doppler Current Profilers (ADCP) enabled new insights into the dynamics of deep scattering layers (DSLs) and diel vertical migration (DVM) of mesopelagic biomass between these deep layers and the near-surface photic zone in the southern Norwegian Sea. The DSL exhibits characteristic vertical movement on inter-monthly time scales, which is associated with undulations of the main pycnocline between the warm Atlantic water and the underlying colder water masses. Timing of the DVM is closely linked to the day-night light cycle—decent from the photic zone just before sunrise and ascent immediately after sunset. Seasonal variations are also evident, with the highest DVM activity and lowest depth averaged mean volume backscatter strength (MVBS) during spring. This suggests that both oceanographic and optical conditions are driving the complex dynamics of pelagic and mesopelagic activity in this region. We hypothesize that the increased abundance of calanoid copepods in the near-surface layer during spring increases the motivation for vertical migration of pelagic and mesopelagic species, which therefore can explain the increased DVM activity during this season. |
format |
Still Image |
author |
Boris Cisewski Hjálmar Hátún Inga Kristiansen Bogi Hansen Karin Margretha H. Larsen Sólvá Káradóttir Eliasen Jan Arge Jacobsen |
author_facet |
Boris Cisewski Hjálmar Hátún Inga Kristiansen Bogi Hansen Karin Margretha H. Larsen Sólvá Káradóttir Eliasen Jan Arge Jacobsen |
author_sort |
Boris Cisewski |
title |
Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
title_short |
Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
title_full |
Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
title_fullStr |
Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
title_full_unstemmed |
Image_1_Vertical Migration of Pelagic and Mesopelagic Scatterers From ADCP Backscatter Data in the Southern Norwegian Sea.TIF |
title_sort |
image_1_vertical migration of pelagic and mesopelagic scatterers from adcp backscatter data in the southern norwegian sea.tif |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2020.542386.s002 https://figshare.com/articles/figure/Image_1_Vertical_Migration_of_Pelagic_and_Mesopelagic_Scatterers_From_ADCP_Backscatter_Data_in_the_Southern_Norwegian_Sea_TIF/13554500 |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Norwegian Sea Copepods |
genre_facet |
Norwegian Sea Copepods |
op_relation |
doi:10.3389/fmars.2020.542386.s002 https://figshare.com/articles/figure/Image_1_Vertical_Migration_of_Pelagic_and_Mesopelagic_Scatterers_From_ADCP_Backscatter_Data_in_the_Southern_Norwegian_Sea_TIF/13554500 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2020.542386.s002 |
_version_ |
1766151263787941888 |