Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the northeast Atlantic
| Autor: | Henk A. Dijkstra, Elena Jurado, H.J. van der Woerd |
|---|---|
| Přispěvatelé: | Spatial analysis & Decision Support, Amsterdam Global Change Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:GE1-350
Turbulence Mixed layer lcsh:Geography. Anthropology. Recreation Wind stress Dissipation Atmospheric sciences Wind speed lcsh:G Climatology TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY Turbulence kinetic energy Transition zone Range (statistics) Geology lcsh:Environmental sciences |
| Zdroj: | Ocean Science Discussions, 9, 2153-2186. European Geosciences Union Digital.CSIC. Repositorio Institucional del CSIC instname Ocean Science, Vol 8, Iss 6, Pp 945-957 (2012) Jurado, E, Dijkstra, H A & van der Woerd, H J 2012, ' Microstructure observations during the spring 2011 STRATIPHYT-II cruise in the Northeast Atlantic ', Ocean Science Discussions, vol. 9, pp. 2153-2186 . https://doi.org/10.5194/os-8-945-2012 |
| ISSN: | 1812-0792 1812-0822 |
| Popis: | 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), which was centered at about 48° N. The temperature eddy diffusivities, KT, range from 10−5 to 100 m2 s−1 in the weakly-stratified stations, and range from 3 × 10−4 to 2 × 100 m2 s−1 in the well-mixed stations. The turbulent kinetic energy dissipation rates, ε, range from 3 × 10−8 to 2 × 10−6 m2 s−3 south of the transition zone, and from 10−7 to 10−5 m2 s−3 north of the transition zone. The station-averaged KT 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/(−κz)). The values of KT 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. |
| Databáze: | OpenAIRE |
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