Surface wave effects in the upper ocean and consequences for biological modeling
Effects of surface gravity waves on particle transport and currents in the upper ocean are studied using field observations and numerical models. Knowledge on upper ocean particle drift is needed for plankton transport studies, search- and rescue operations and oil drift modelling. Such applications...
Published in: | Ocean Dynamics |
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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The University of Bergen
2014
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Online Access: | https://hdl.handle.net/1956/7897 |
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ftunivbergen:oai:bora.uib.no:1956/7897 2023-05-15T15:15:36+02:00 Surface wave effects in the upper ocean and consequences for biological modeling Röhrs, Johannes 2014-03-21 application/pdf https://hdl.handle.net/1956/7897 eng eng The University of Bergen Paper 1: Observation-based evaluation of surface wave effects on currents and trajectory forecasts. Johannes Röhrs, Kai Håkon Christensen, Lars Robert Hole, Göran Broström, Magnus Drivdal and Svein Sundby. Ocean Dynamics 62, 1519–1533, 2012. The article is not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1007/s10236-012-0576-y Paper 2: Wave induced transport and vertical mixing of pelagic eggs and larvae. Johannes Röhrs, Kai Håkon Christensen, Frode Vikebø, Svein Sundby, Øyvind Sætra and Göran Broström. The article is not available in BORA. Paper 3: Surface wave measurements using a ship-mounted ultrasonic altimeter. Kai Håkon Christensen, Johannes Röhrs, Brian Ward, Ilker Fer, Göran Broström, Øyvind Sætra and Øyvind Breivik. Methods in Oceanography 6, 1–15, 2013. The article is not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1016/j.mio.2013.07.002 Paper 4: Comparison of HF radar measurements with Eulerian and Lagrangian surface currents. Johannes Röhrs, Ann Kristin Sperrevik, Kai Håkon Christensen, Göran Broström and Øyvind Breivik. The article is not available in BORA. urn:isbn:978-82-308-2936-1 https://hdl.handle.net/1956/7897 Copyright the author. All rights reserved Doctoral thesis 2014 ftunivbergen https://doi.org/10.1007/s10236-012-0576-y10.1016/j.mio.2013.07.002 2023-03-14T17:40:14Z Effects of surface gravity waves on particle transport and currents in the upper ocean are studied using field observations and numerical models. Knowledge on upper ocean particle drift is needed for plankton transport studies, search- and rescue operations and oil drift modelling. Such applications depend on upper ocean currents on time scales from hours up to several months, and surface gravity waves affect the air-sea momentum exchange particularly on these time scales. Objects near the surface are also exposed to the wave-induced Stokes drift, which moves particles in the wave propagation direction at a speed with similar magnitude as the Eulerian current. Surface waves furthermore modify the Eulerian mean currents by momentum release during wave breaking and the dissipation of wave energy into oceanic turbulence. Measurements of upper ocean currents, surface drifters, and waves were taken during field campaigns in Northern Norway. Ocean currents from acoustic Doppler current profilers, high-frequency (HF) radars and satellite-tracked surface drifters were synthesized with wave measurements to separate the Eulerian currents from the Lagrangian, their difference is the Stokes drift. The contribution of waves to surface drifter velocities and observed HF radar currents was quantified and compared with theoretical concepts from the literature. The surface drifters followed the sum of Eulerian currents and Stokes drift with little wind drag. In contrast to previous assumptions, the observation showed that HF radar-derived currents do not include the Stokes drift. The observations were also used to quantify the momentum and energy fluxes from waves into the ocean during a wind event. The wave-induced drift of suspended plankton was investigated for the example of Northeast Arctic (NEA) cod eggs. Their physical properties are relatively well known, providing a practical example for biological models that depend on oceanic circulation. A combined ocean circulation model, wave model and particle tracking model is ... Doctoral or Postdoctoral Thesis Arctic Northern Norway University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Norway Ocean Dynamics 62 10-12 1519 1533 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Effects of surface gravity waves on particle transport and currents in the upper ocean are studied using field observations and numerical models. Knowledge on upper ocean particle drift is needed for plankton transport studies, search- and rescue operations and oil drift modelling. Such applications depend on upper ocean currents on time scales from hours up to several months, and surface gravity waves affect the air-sea momentum exchange particularly on these time scales. Objects near the surface are also exposed to the wave-induced Stokes drift, which moves particles in the wave propagation direction at a speed with similar magnitude as the Eulerian current. Surface waves furthermore modify the Eulerian mean currents by momentum release during wave breaking and the dissipation of wave energy into oceanic turbulence. Measurements of upper ocean currents, surface drifters, and waves were taken during field campaigns in Northern Norway. Ocean currents from acoustic Doppler current profilers, high-frequency (HF) radars and satellite-tracked surface drifters were synthesized with wave measurements to separate the Eulerian currents from the Lagrangian, their difference is the Stokes drift. The contribution of waves to surface drifter velocities and observed HF radar currents was quantified and compared with theoretical concepts from the literature. The surface drifters followed the sum of Eulerian currents and Stokes drift with little wind drag. In contrast to previous assumptions, the observation showed that HF radar-derived currents do not include the Stokes drift. The observations were also used to quantify the momentum and energy fluxes from waves into the ocean during a wind event. The wave-induced drift of suspended plankton was investigated for the example of Northeast Arctic (NEA) cod eggs. Their physical properties are relatively well known, providing a practical example for biological models that depend on oceanic circulation. A combined ocean circulation model, wave model and particle tracking model is ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Röhrs, Johannes |
spellingShingle |
Röhrs, Johannes Surface wave effects in the upper ocean and consequences for biological modeling |
author_facet |
Röhrs, Johannes |
author_sort |
Röhrs, Johannes |
title |
Surface wave effects in the upper ocean and consequences for biological modeling |
title_short |
Surface wave effects in the upper ocean and consequences for biological modeling |
title_full |
Surface wave effects in the upper ocean and consequences for biological modeling |
title_fullStr |
Surface wave effects in the upper ocean and consequences for biological modeling |
title_full_unstemmed |
Surface wave effects in the upper ocean and consequences for biological modeling |
title_sort |
surface wave effects in the upper ocean and consequences for biological modeling |
publisher |
The University of Bergen |
publishDate |
2014 |
url |
https://hdl.handle.net/1956/7897 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Northern Norway |
genre_facet |
Arctic Northern Norway |
op_relation |
Paper 1: Observation-based evaluation of surface wave effects on currents and trajectory forecasts. Johannes Röhrs, Kai Håkon Christensen, Lars Robert Hole, Göran Broström, Magnus Drivdal and Svein Sundby. Ocean Dynamics 62, 1519–1533, 2012. The article is not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1007/s10236-012-0576-y Paper 2: Wave induced transport and vertical mixing of pelagic eggs and larvae. Johannes Röhrs, Kai Håkon Christensen, Frode Vikebø, Svein Sundby, Øyvind Sætra and Göran Broström. The article is not available in BORA. Paper 3: Surface wave measurements using a ship-mounted ultrasonic altimeter. Kai Håkon Christensen, Johannes Röhrs, Brian Ward, Ilker Fer, Göran Broström, Øyvind Sætra and Øyvind Breivik. Methods in Oceanography 6, 1–15, 2013. The article is not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1016/j.mio.2013.07.002 Paper 4: Comparison of HF radar measurements with Eulerian and Lagrangian surface currents. Johannes Röhrs, Ann Kristin Sperrevik, Kai Håkon Christensen, Göran Broström and Øyvind Breivik. The article is not available in BORA. urn:isbn:978-82-308-2936-1 https://hdl.handle.net/1956/7897 |
op_rights |
Copyright the author. All rights reserved |
op_doi |
https://doi.org/10.1007/s10236-012-0576-y10.1016/j.mio.2013.07.002 |
container_title |
Ocean Dynamics |
container_volume |
62 |
container_issue |
10-12 |
container_start_page |
1519 |
op_container_end_page |
1533 |
_version_ |
1766345966579875840 |