European Directory of Marine Environmental Data (EDMED)

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General
Data set name

Time series data collected by an Acoustic Doppler Current Profiler (ADCP) at the Wyville-Thomson Ridge (2003-2013)

Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
ProjectOceans 2025 Theme 10; Ocean Processes Evidence Group
Time periodFrom 2003-2013
OngoingNo
Geographical area

Eastern Wyville-Thomson Ridge (north of Scotland)

Observations 
Parameters

Vertical velocity of the water column (currents); Horizontal velocity of the water column (currents); Raw temperature and/or salinity instrument output; Temperature of the water column; Acoustic backscatter in the water column

Instruments

Current meters; water temperature sensor; acoustic backscatter sensors; salinity sensor

Description 
Summary

This dataset consists of current velocity measurements of the water column from an upward-looking Acoustic Doppler Current Profiler (ADCP) deployed on the seabed. Occasionally, the dataset is complemented by independent temperature and salinity measurements from an adjacent Sea-Bird MicroCAT. The mooring is situated in the region of the Wyville Thomson Ridge – a notable bathymetric feature running north west from the Scottish shelf towards the Faroe Bank. The gully present between the Ridge and the parallel Ymir Ridge is the study site chosen for mooring work that began in 2003 and ended in 2013. Deployment durations have typically ranged from between five and twelve months. Successive deployments have enabled a multi-year time series to develop. There have, however, been periods of instrumentation loss, which account for some gaps in the overall record (most noticeably during 2008/2009). Servicing of the mooring has been achieved using various research vessels and has often been incorporated into the schedule of the annual cruises occupying the Extended Ellett Line. The mooring consists of an anchored buoy housing an RDI Long Ranger ADCP, designed to rest on the seabed, with the instrument facing upwards. Current velocity measurements from the mooring help to provide valuable insight into regional ocean circulation. A small, poorly quantified, component of the southward-flowing deep water from the Arctic cascades over the Wyville Thomson Ridge from the Faroe Bank Channel into the northern Rockall Trough. Maintaining this time series will afford a better understanding of this outflow. The Wyville Thomson mooring work is led by Toby Sherwin at the Scottish Association for Marine Science (SAMS).

OriginatorsBritish Oceanographic Data Centre
References

Toby Sherwin, Colin Griffiths, Mark Inall, William Turrell (2007) Quantifying the overflow across the Wyville Thomson Ridge into the Rockall Trough, Deep Sea Research Part 1: Oceanographic Research Papers

Availability 
OrganisationBritish Oceanographic Data Centre
AvailabilityLicence
ContactPolly Hadžiabdić (Head of the BODC Requests Team)
Address

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
Liverpool
Merseyside
L3 5DA
United Kingdom

Telephone+44 (0) 151 795 4884
Emailenquiries@bodc.ac.uk
Administration 
Collating centreBritish Oceanographic Data Centre
Local identifier1048WTRMOORING
Global identifier5773
Last revised2016-01-29