Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground
Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution and sustenance. We investigated oceanographic conditions at a...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.927956 2023-05-15T14:26:50+02:00 Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground Hanz, Ulrike LATITUDE: 73.816000 * LONGITUDE: 7.523468 * DATE/TIME START: 2016-06-25T01:07:30 * DATE/TIME END: 2017-07-27T12:05:13 * MINIMUM DEPTH, water: 663.109 m * MAXIMUM DEPTH, water: 663.109 m 2021-02-15 text/tab-separated-values, 446772 data points https://doi.pangaea.de/10.1594/PANGAEA.927956 https://doi.org/10.1594/PANGAEA.927956 en eng PANGAEA Hanz, Ulrike; Roberts, Emyr Martyn; Duineveld, Gerard C A; Davies, Andrew; van Haren, Hans; Rapp, Hans Tore; Reichart, Gert-Jan; Mienis, Furu (accepted): Long‐term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep‐Sea Sponge Ground. Journal of Geophysical Research: Oceans, 126(3), https://doi.org/10.1029/2020JC016776 https://doi.pangaea.de/10.1594/PANGAEA.927956 https://doi.org/10.1594/PANGAEA.927956 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Acoustic Doppler Current Profiler (ADCP Teledyne-RDI 1200 kHz records 13 bins of 1 m between 3.55 and 15.55 m above bottom (mab)) B_LANDER Backscatter Bottom lander Combined temperature and oxygen sensor (Advantech RINKO) Current direction Current speed Current velocity east-west north-south DATE/TIME Deep-sea Sponge Grounds Ecosystems of the North Atlantic Density sigma in situ DEPTH water Fluorescence chlorophyll Fluorometer/turbidity meter WET Labs ECO FLNTU G. O. Sars (2003) GS16A-202 GS2016109A GS2016109A-07-LAN-01 GS2017110 GS2017110-17-LAN-04 Oxygen dissolved Salinity Schultz Bank SponGES Temperature Turbidity Dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.927956 https://doi.org/10.1029/2020JC016776 2023-01-20T09:14:27Z Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution and sustenance. We investigated oceanographic conditions at a deep-sea sponge ground located on an Arctic Mid-Ocean Ridge seamount. Hydrodynamic measurements were performed along CTD transects and a lander was deployed within the sponge ground that recorded near-bottom physical properties as well as vertical fluxes of organic matter over an annual cycle. The data demonstrate that the sponge ground is found at water temperatures of -0.5 to 1 °C and is situated at the interface between two water masses at only 0.7° equatorward of the turning point latitude of semidiurnal lunar internal tides. Internal waves supported by vertical density stratification interact with the seamount topography and produce turbulent mixing as well as resuspension of organic matter with temporarily very high current speeds up to 0.72 m s-1. The vertical movement of the water column delivers food and nutrients from water layers above and below towards the sponge ground. Highest organic carbon flux was observed during the summer phytoplankton bloom period, providing fresh organic matter from the surface. The flux of fresh organic matter is unlikely to sustain the carbon demand of this ecosystem. Therefore, the availability of bacteria, nutrients and dissolved and particulate matter, delivered by tidally-forced internal wave turbulence and transport by horizontal mean flows, likely plays an important role in meeting ecosystem-level food requirements. Dataset Arctic Arctic North Atlantic Phytoplankton PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(7.523468,7.523468,73.816000,73.816000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Acoustic Doppler Current Profiler (ADCP Teledyne-RDI 1200 kHz records 13 bins of 1 m between 3.55 and 15.55 m above bottom (mab)) B_LANDER Backscatter Bottom lander Combined temperature and oxygen sensor (Advantech RINKO) Current direction Current speed Current velocity east-west north-south DATE/TIME Deep-sea Sponge Grounds Ecosystems of the North Atlantic Density sigma in situ DEPTH water Fluorescence chlorophyll Fluorometer/turbidity meter WET Labs ECO FLNTU G. O. Sars (2003) GS16A-202 GS2016109A GS2016109A-07-LAN-01 GS2017110 GS2017110-17-LAN-04 Oxygen dissolved Salinity Schultz Bank SponGES Temperature Turbidity |
spellingShingle |
Acoustic Doppler Current Profiler (ADCP Teledyne-RDI 1200 kHz records 13 bins of 1 m between 3.55 and 15.55 m above bottom (mab)) B_LANDER Backscatter Bottom lander Combined temperature and oxygen sensor (Advantech RINKO) Current direction Current speed Current velocity east-west north-south DATE/TIME Deep-sea Sponge Grounds Ecosystems of the North Atlantic Density sigma in situ DEPTH water Fluorescence chlorophyll Fluorometer/turbidity meter WET Labs ECO FLNTU G. O. Sars (2003) GS16A-202 GS2016109A GS2016109A-07-LAN-01 GS2017110 GS2017110-17-LAN-04 Oxygen dissolved Salinity Schultz Bank SponGES Temperature Turbidity Hanz, Ulrike Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
topic_facet |
Acoustic Doppler Current Profiler (ADCP Teledyne-RDI 1200 kHz records 13 bins of 1 m between 3.55 and 15.55 m above bottom (mab)) B_LANDER Backscatter Bottom lander Combined temperature and oxygen sensor (Advantech RINKO) Current direction Current speed Current velocity east-west north-south DATE/TIME Deep-sea Sponge Grounds Ecosystems of the North Atlantic Density sigma in situ DEPTH water Fluorescence chlorophyll Fluorometer/turbidity meter WET Labs ECO FLNTU G. O. Sars (2003) GS16A-202 GS2016109A GS2016109A-07-LAN-01 GS2017110 GS2017110-17-LAN-04 Oxygen dissolved Salinity Schultz Bank SponGES Temperature Turbidity |
description |
Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution and sustenance. We investigated oceanographic conditions at a deep-sea sponge ground located on an Arctic Mid-Ocean Ridge seamount. Hydrodynamic measurements were performed along CTD transects and a lander was deployed within the sponge ground that recorded near-bottom physical properties as well as vertical fluxes of organic matter over an annual cycle. The data demonstrate that the sponge ground is found at water temperatures of -0.5 to 1 °C and is situated at the interface between two water masses at only 0.7° equatorward of the turning point latitude of semidiurnal lunar internal tides. Internal waves supported by vertical density stratification interact with the seamount topography and produce turbulent mixing as well as resuspension of organic matter with temporarily very high current speeds up to 0.72 m s-1. The vertical movement of the water column delivers food and nutrients from water layers above and below towards the sponge ground. Highest organic carbon flux was observed during the summer phytoplankton bloom period, providing fresh organic matter from the surface. The flux of fresh organic matter is unlikely to sustain the carbon demand of this ecosystem. Therefore, the availability of bacteria, nutrients and dissolved and particulate matter, delivered by tidally-forced internal wave turbulence and transport by horizontal mean flows, likely plays an important role in meeting ecosystem-level food requirements. |
format |
Dataset |
author |
Hanz, Ulrike |
author_facet |
Hanz, Ulrike |
author_sort |
Hanz, Ulrike |
title |
Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
title_short |
Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
title_full |
Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
title_fullStr |
Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
title_full_unstemmed |
Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground |
title_sort |
long-term monitoring of near-bottom physical properties at an arctic deep-sea sponge ground |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.927956 https://doi.org/10.1594/PANGAEA.927956 |
op_coverage |
LATITUDE: 73.816000 * LONGITUDE: 7.523468 * DATE/TIME START: 2016-06-25T01:07:30 * DATE/TIME END: 2017-07-27T12:05:13 * MINIMUM DEPTH, water: 663.109 m * MAXIMUM DEPTH, water: 663.109 m |
long_lat |
ENVELOPE(7.523468,7.523468,73.816000,73.816000) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic North Atlantic Phytoplankton |
genre_facet |
Arctic Arctic North Atlantic Phytoplankton |
op_relation |
Hanz, Ulrike; Roberts, Emyr Martyn; Duineveld, Gerard C A; Davies, Andrew; van Haren, Hans; Rapp, Hans Tore; Reichart, Gert-Jan; Mienis, Furu (accepted): Long‐term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep‐Sea Sponge Ground. Journal of Geophysical Research: Oceans, 126(3), https://doi.org/10.1029/2020JC016776 https://doi.pangaea.de/10.1594/PANGAEA.927956 https://doi.org/10.1594/PANGAEA.927956 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.927956 https://doi.org/10.1029/2020JC016776 |
_version_ |
1766300279080222720 |