Oslo fjord, 20-23 June, 2011, CTD and Dissipation rates
type: Dataset
distribution: Landing page for the dataset
title: Oslofjorden 20-23 juni 2011, CTD och spridningshastigheter @sv
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-fjord transects over the Drøbak Sill and 2 across-fjord transects just inside the sill. Altogether 368 profiles were collected. 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 of the shear variance, the dissipation rates are obtained by fitting the observed shear spectrum to the universal Nasmyth spectrum for that component. This is done in 50% overlapping 512 point segments, and the resulting estimates of dissipation rate are averaged…
description: Vertikala profiler för stratifiering och spridningshastigheter av turbulent kinetisk energi längs transekt. Data samlades in under perioden 20 juni till 23 juni 2011 ombord på fartyget R/V Trygve Braarud. Vindförhållandena var relativt lugna under datainsamlingen. Mätningar/profileringarna genomfördes med ett turbulensinstrument, MSS90L. Totalt 15 transekter utfördes; 13 längs fjorden och 2 tvärs över fjorden. Totalt insamlades 368 profiler För mer information se den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/ecds0113 Se beskrivning på engelska. @sv
modified: 2021-03-25T12:32:58.360417Z
issued: 2021-03-25T12:32:58.360417Z
publisher: University of Gothenburg
theme: ENVI
access rights: PUBLIC
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Lars Arneborg
    type: Agent
    type: PrivateIndividual(s)
contact point: Individual
  fn: Lars Arneborg
keyword: OXYGEN
keyword: POTENTIAL DENSITY
keyword: SALINITY
keyword: CONDUCTIVITY
keyword: DENSITY
keyword: TURBIDITY
keyword: FLUORESCENCE
keyword: DIFFUSION
keyword: TURBULENCE
keyword: WATER TEMPERATURE
keyword: POTENTIAL TEMPERATURE
temporal: PeriodOfTime
  start date: 2011-06-20
  end date: 2011-06-23
language: ENG
spatial: Norway

Landing page for the dataset
type: Distribution
title: Landningssida för datasetet @sv
access URL: Oslo fjord, 20-23 June, 2011, CTD and Dissipation rates
availability: stable

University of Gothenburg
type: Agent
name: Göteborgs universitet @sv
type: Academia-ScientificOrganisation
source: 01tm6cn81

Norway
type: Location
label: Norge @sv