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Temperature and salinity profiles from a vertically profiling float (‘Wirewalker’) in the Celtic Sea.

Title

Temperature and salinity profiles from a vertically profiling float ("Wirewalker") deployed in the Celtic Sea during UK Shelf Sea Biogeochemistry cruise RRS Discovery DY029 in April 2015.

Author(s) Hopkins J. (1); Jones E. (1); Kenny J. (1); Balfour C.A. (1)

(1) National Oceanography Centre, Liverpool

Subject oceans
Abstract

This dataset contains 685 temperature and salinity profiles collected from a wave-powered vertically profiling float ("Wirewalker"), deployed in the Celtic Sea during UK Shelf Sea Biogeochemistry (SSB) cruise RRS Discovery DY029 in April 2015. These data were collected in order to provide detailed information on water column structure and stability during the winter to spring transition. Measurements were collected between 1 and 110 m depths from an RBR Concerto CTD (S/N 60047) sampling continuously at 6 Hz. The sensor was mounted in a vertical orientation near the top of a Wirewalker profiler moored at 49.40465, -8.597 in a total water depth of 145 m. The mooring was deployed on 5 April 2015 14:06 and recovered on 11 April 2015 13:45. Raw data were extracted from the RBR proprietary format and up-cast profiles isolated. Salinity spiking was minimised by applying a lag correction to the conductivity. The optimal lag was calculated on each individual profile using temperature and conductivity measurements made within the thermocline. The average lag was 0.16 seconds (conductivity leading temperature). Salinity measurements falling outside of +/- 3 standard deviations of the deployment mean were removed. A 4-second running average filter was subsequently applied to the salinity to further reduce noise. The salinity and temperature were checked against CTD casts made near the Wirewalker mooring. The calculated offsets were within the stated accuracy of the RBR Concerto so no calibration was necessary. Data were collected as part of the CaNDyFloSS: Carbon and Nutrient Dynamics and Fluxes over Shelf Systems (NE/K00185X/1) project. SSB was co-funded by the Natural Environment Research Council (NERC) and the Department for Environment, Food and Rural Affairs (Defra). The programme took a holistic approach to the cycling of nutrients and carbon and the controls on primary and secondary production in UK and European shelf seas, to increase understanding of these processes and their role in wider biogeochemical cycles. The research was led by Dr Jo Hopkins, along with Mr Emlyn Jones, Dr John Kenny, and Dr Chris Balfour.

Temporal coverage 05 April 2015 - 11 April 2015
Spatial coverage Celtic Sea
File format Documents, Text or Plaintext
Language English
Discovery metadata record Link to the related European Directory of Marine Environmental Data (EDMED) record
Publisher British Oceanographic Data Centre, National Oceanography Centre, NERC, UK
Publication date 02 August 2019
Digital Object Identifier (DOI) doi:10.5285/8f1ffe5a-3e34-2a60-e053-6c86abc08d3d
Short DOI doi:10/c9bm
Citation text Hopkins J.; Jones E.; Kenny J.; Balfour C.A.(2019). Temperature and salinity profiles from a vertically profiling float ("Wirewalker") deployed in the Celtic Sea during UK Shelf Sea Biogeochemistry cruise RRS Discovery DY029 in April 2015. British Oceanographic Data Centre, National Oceanography Centre, NERC, UK. doi:10/c9bm.