Oslo fjord, 20-23 June, 2011, CTD and Dissipation rates

SND-ID: ECDS 0113

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Description Data and documentation

Creator/Principal investigator(s)

Lars Arneborg - University of Gothenburg, Department of Marine Sciences

Description

Vertical profiles of stratification and dissipation rates of turbulent kinetic energy along transects. The data were collected during the period June 20 to June 23, 2011 on board the R/V Trygve Braarud. The wind conditions were relatively calm during the data collection. The maximum measured wind speed at station Gullholmen (59°26.11’N 10°34.68’) was 8.4 m/s. A MSS90L profiler (MSS) was dropped continuously from the stern of the ship as it cruised at low speeds (~1 knot). The MSS90L is a loosely tethered profiler with standard conductivity, temperature and pressure (CTD) sensors as well as two airfoil shear probes (PNS06) sampling at 1024 Hz with 16 bit resolution while the profiler is freely falling through the water with a sinking speed of about 0.6-0.7 m s-1. A more detailed discussion of an earlier version of the instrument can be found in Prandke and Stips (1998). A sensor protecion guard allowd full depth profiles down to 0.1 m above the bottom, with exception of the upper 2-3 meters which were influenced by vessel turbulence and removed. A total of 15 transects were performed; 13 along-

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Language

English

Research principal, contributors, and funding
Protection and ethical review

Data contains personal data

No

Method

Time period(s) investigated

2011-06-20–2011-06-23

Geographic coverage

Geographic spread

Geographic location: Norway

Geographic description: Oslo fjord

Publications

Staalstrøm, A., Arneborg, L., Liljebladh, B., & Broström, G. (2015). Observations of Turbulence Caused by a Combination of Tides and Mean Baroclinic Flow over a Fjord Sill. Journal of Physical Oceanography, 45(2), 355–368. https://doi.org/10.1175/jpo-d-13-0200.1
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Dataset
Oslo fjord, 20-23 June, 2011, CTD and Dissipation rates

Description

Dissipation rates: Dissipation rates of turbulent kinetic energy were obtained from the microstructure shear data using standard methods, as describe in more detail by e.g. Arneborg and Liljebladh (2009). Basically, the shear probes measure how one transverse velocity component changes along the path of the profiler. From the shear variance one can calculate the dissipation rate under the assumption of isotropic turbulence. However, since the sensors do not cover the complete wave-number range o

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Version 1

Citation

Lars Arneborg. University of Gothenburg, Department of Marine Sciences (2021). <em>Oslo fjord, 20-23 June, 2011, CTD and Dissipation rates</em>. Swedish National Data Service. Version 1. <a href="https://doi.org/10.5878/e0q6-c367">https://doi.org/10.5878/e0q6-c367</a>

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Data format / data structure

Numeric

Creator/Principal investigator(s)

Lars Arneborg - University of Gothenburg, Department of Marine Sciences

License

Creative Commons  Attribution 4.0 International (CC BY 4.0)

Contact for questions about the data

Published: 2021-03-25