Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic
Small-scale temperature and conductivity variations have been measured in the upper 100 m of the northeast Atlantic during the STRATIPHYT-II cruise (Las Palmas–Reykjavik, 6 April–3 May 2011). The measurements were done at midday and comprised 2 to 15 vertical profiles at each station. The derived tu...
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Online Access: | https://doi.org/10.5194/os-8-945-2012 https://os.copernicus.org/articles/8/945/2012/ |
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ftcopernicus:oai:publications.copernicus.org:os14879 2023-05-15T17:41:18+02:00 Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic Jurado, E. Dijkstra, H. A. Woerd, H. J. 2018-01-15 application/pdf https://doi.org/10.5194/os-8-945-2012 https://os.copernicus.org/articles/8/945/2012/ eng eng doi:10.5194/os-8-945-2012 https://os.copernicus.org/articles/8/945/2012/ eISSN: 1812-0792 Text 2018 ftcopernicus https://doi.org/10.5194/os-8-945-2012 2020-07-20T16:25:39Z Small-scale temperature and conductivity variations have been measured in the upper 100 m of the northeast Atlantic during the STRATIPHYT-II cruise (Las Palmas–Reykjavik, 6 April–3 May 2011). The measurements were done at midday and comprised 2 to 15 vertical profiles at each station. The derived turbulent quantities show a transition between weakly-stratified (mixed layer depth, MLD, <100) and well-mixed waters (MLD > 100), which was centered at about 48° N. The temperature eddy diffusivities, K T , range from 10 −5 to 10 0 m 2 s −1 in the weakly-stratified stations, and range from 3 × 10 −4 to 2 × 10 0 m 2 s −1 in the well-mixed stations. The turbulent kinetic energy dissipation rates, ε, range from 3 × 10 −8 to 2 × 10 −6 m 2 s −3 south of the transition zone, and from 10 −7 to 10 −5 m 2 s −3 north of the transition zone. The station-averaged K T values throughout the mixed layer increase exponentially with the wind speed. The station-averaged ε values throughout the mixed layer scale with the wind stress similarity variable with a scaling factor of about 1.8 in the wind-dominated stations (ε ≈ 1.8 u ☆ 3 /(−κ z )). The values of K T and ε are on average 10 times higher compared to the values measured at the same stations in July 2009. The results presented here constitute a unique data set giving large spatial coverage of upper ocean spring turbulence quantities. Text Northeast Atlantic Copernicus Publications: E-Journals Las Palmas ENVELOPE(-60.674,-60.674,-62.971,-62.971) Ocean Science 8 6 945 957 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Small-scale temperature and conductivity variations have been measured in the upper 100 m of the northeast Atlantic during the STRATIPHYT-II cruise (Las Palmas–Reykjavik, 6 April–3 May 2011). The measurements were done at midday and comprised 2 to 15 vertical profiles at each station. The derived turbulent quantities show a transition between weakly-stratified (mixed layer depth, MLD, <100) and well-mixed waters (MLD > 100), which was centered at about 48° N. The temperature eddy diffusivities, K T , range from 10 −5 to 10 0 m 2 s −1 in the weakly-stratified stations, and range from 3 × 10 −4 to 2 × 10 0 m 2 s −1 in the well-mixed stations. The turbulent kinetic energy dissipation rates, ε, range from 3 × 10 −8 to 2 × 10 −6 m 2 s −3 south of the transition zone, and from 10 −7 to 10 −5 m 2 s −3 north of the transition zone. The station-averaged K T values throughout the mixed layer increase exponentially with the wind speed. The station-averaged ε values throughout the mixed layer scale with the wind stress similarity variable with a scaling factor of about 1.8 in the wind-dominated stations (ε ≈ 1.8 u ☆ 3 /(−κ z )). The values of K T and ε are on average 10 times higher compared to the values measured at the same stations in July 2009. The results presented here constitute a unique data set giving large spatial coverage of upper ocean spring turbulence quantities. |
format |
Text |
author |
Jurado, E. Dijkstra, H. A. Woerd, H. J. |
spellingShingle |
Jurado, E. Dijkstra, H. A. Woerd, H. J. Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
author_facet |
Jurado, E. Dijkstra, H. A. Woerd, H. J. |
author_sort |
Jurado, E. |
title |
Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
title_short |
Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
title_full |
Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
title_fullStr |
Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
title_full_unstemmed |
Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic |
title_sort |
microstructure observations during the spring 2011 stratiphyt-ii cruise in the northeast atlantic |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-8-945-2012 https://os.copernicus.org/articles/8/945/2012/ |
long_lat |
ENVELOPE(-60.674,-60.674,-62.971,-62.971) |
geographic |
Las Palmas |
geographic_facet |
Las Palmas |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-8-945-2012 https://os.copernicus.org/articles/8/945/2012/ |
op_doi |
https://doi.org/10.5194/os-8-945-2012 |
container_title |
Ocean Science |
container_volume |
8 |
container_issue |
6 |
container_start_page |
945 |
op_container_end_page |
957 |
_version_ |
1766142773643182080 |