Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic
Cold-water corals (CWCs) thrive in areas with complex and rough topography favoring the development of highly diverse benthic communities. Several biotic and abiotic factors including organic matter supply, temperature, bottom roughness and currents are important drivers of ecosystem structure and f...
Published in: | Progress in Oceanography |
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2023
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Online Access: | https://www.vliz.be/imisdocs/publications/93/395793.pdf |
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ftnioz:oai:imis.nioz.nl:381445 2024-09-09T19:58:04+00:00 Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic Mohn, C. Hansen, J.L.S. Carreiro-Silva, M. Cunningham, S.A. de Froe, E. Dominguez-Carrió, C. Gary, S.F. Glud, R.N. Göke, C. Johnson, C. Morato, T. Friis Møller, E. Rovelli, L. Schulz, K. Soetaert, K. van der Kaaden, A.-S. van Oevelen, D. 2023 application/pdf https://www.vliz.be/imisdocs/publications/93/395793.pdf en eng info:eu-repo/semantics/altIdentifier/wos/001004259700001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.pocean.2023.103031 https://www.vliz.be/imisdocs/publications/93/395793.pdf info:eu-repo/semantics/openAccess %3Ci%3EProg.+Oceanogr.+214%3C%2Fi%3E%3A+103031.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.pocean.2023.103031%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.pocean.2023.103031%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftnioz https://doi.org/10.1016/j.pocean.2023.103031 2024-08-26T03:37:14Z Cold-water corals (CWCs) thrive in areas with complex and rough topography favoring the development of highly diverse benthic communities. Several biotic and abiotic factors including organic matter supply, temperature, bottom roughness and currents are important drivers of ecosystem structure and functioning in deep-sea environments at different spatial and temporal scales. Little is known, however, how basin-scale changes in the ocean climate affect these drivers at local scales. Here, we use high-resolution implementations of the hydrodynamic model ROMS-AGRIF for estimating characteristic spatial and temporal scales of local hydrodynamics in response to variations of basin-scale currents imposed by distinct changes of the Atlantic Meridional Overturning Circulation (AMOC) in the past century. We focus on two CWC communities on the SE Rockall Bank slope and at Condor Seamount. We considered two contrasting AMOC states that were identified from the 1958–2009 hindcast of the 1/20° resolution VIKING20 North Atlantic basin-scale ocean circulation model and used as boundary conditions for the high-resolution local area models. At SE Rockall Bank, variability of near-bottom currents in both regions was largely dominated by tidal dynamics, but strongly modified by AMOC induced basin-scale variations of water mass properties and bottom currents. During strong AMOC years, waters in the main CWC depth corridor (600–1200m) were cooler and less saline but were dominated by stronger bottom currents when compared with conditions during weak AMOC years. At Condor Seamount, bottom currents were largely unaffected by AMOC related changes close to the summit at water depths<400m. Kinetic energy dissipation rates derived from the 3D near-bottom velocity field appeared to positively relate with the in-situ CWC distribution. Kinetic energy dissipation is therefore proposed as a mechanistic descriptor of CWC presence as it provides a more mechanistic view of hydrodynamics driving organic matter supply to filter and ... Article in Journal/Newspaper North Atlantic Northeast Atlantic NIOZ Repository (Royal Netherlands Institute for Sea Research) Rockall Bank ENVELOPE(-16.519,-16.519,55.821,55.821) Progress in Oceanography 214 103031 |
institution |
Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
Cold-water corals (CWCs) thrive in areas with complex and rough topography favoring the development of highly diverse benthic communities. Several biotic and abiotic factors including organic matter supply, temperature, bottom roughness and currents are important drivers of ecosystem structure and functioning in deep-sea environments at different spatial and temporal scales. Little is known, however, how basin-scale changes in the ocean climate affect these drivers at local scales. Here, we use high-resolution implementations of the hydrodynamic model ROMS-AGRIF for estimating characteristic spatial and temporal scales of local hydrodynamics in response to variations of basin-scale currents imposed by distinct changes of the Atlantic Meridional Overturning Circulation (AMOC) in the past century. We focus on two CWC communities on the SE Rockall Bank slope and at Condor Seamount. We considered two contrasting AMOC states that were identified from the 1958–2009 hindcast of the 1/20° resolution VIKING20 North Atlantic basin-scale ocean circulation model and used as boundary conditions for the high-resolution local area models. At SE Rockall Bank, variability of near-bottom currents in both regions was largely dominated by tidal dynamics, but strongly modified by AMOC induced basin-scale variations of water mass properties and bottom currents. During strong AMOC years, waters in the main CWC depth corridor (600–1200m) were cooler and less saline but were dominated by stronger bottom currents when compared with conditions during weak AMOC years. At Condor Seamount, bottom currents were largely unaffected by AMOC related changes close to the summit at water depths<400m. Kinetic energy dissipation rates derived from the 3D near-bottom velocity field appeared to positively relate with the in-situ CWC distribution. Kinetic energy dissipation is therefore proposed as a mechanistic descriptor of CWC presence as it provides a more mechanistic view of hydrodynamics driving organic matter supply to filter and ... |
format |
Article in Journal/Newspaper |
author |
Mohn, C. Hansen, J.L.S. Carreiro-Silva, M. Cunningham, S.A. de Froe, E. Dominguez-Carrió, C. Gary, S.F. Glud, R.N. Göke, C. Johnson, C. Morato, T. Friis Møller, E. Rovelli, L. Schulz, K. Soetaert, K. van der Kaaden, A.-S. van Oevelen, D. |
spellingShingle |
Mohn, C. Hansen, J.L.S. Carreiro-Silva, M. Cunningham, S.A. de Froe, E. Dominguez-Carrió, C. Gary, S.F. Glud, R.N. Göke, C. Johnson, C. Morato, T. Friis Møller, E. Rovelli, L. Schulz, K. Soetaert, K. van der Kaaden, A.-S. van Oevelen, D. Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
author_facet |
Mohn, C. Hansen, J.L.S. Carreiro-Silva, M. Cunningham, S.A. de Froe, E. Dominguez-Carrió, C. Gary, S.F. Glud, R.N. Göke, C. Johnson, C. Morato, T. Friis Møller, E. Rovelli, L. Schulz, K. Soetaert, K. van der Kaaden, A.-S. van Oevelen, D. |
author_sort |
Mohn, C. |
title |
Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
title_short |
Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
title_full |
Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
title_fullStr |
Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
title_full_unstemmed |
Tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the Northeast Atlantic |
title_sort |
tidal to decadal scale hydrodynamics at two contrasting cold-water coral sites in the northeast atlantic |
publishDate |
2023 |
url |
https://www.vliz.be/imisdocs/publications/93/395793.pdf |
long_lat |
ENVELOPE(-16.519,-16.519,55.821,55.821) |
geographic |
Rockall Bank |
geographic_facet |
Rockall Bank |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/001004259700001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.pocean.2023.103031 https://www.vliz.be/imisdocs/publications/93/395793.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2023.103031 |
container_title |
Progress in Oceanography |
container_volume |
214 |
container_start_page |
103031 |
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