e70a63111c5357cda85118b84c61dd70 English dataset Polly Hadžiabdic British Oceanographic Data Centre Head of the BODC Requests Team Joseph Proudman Building 6 Brownlow Street Liverpool Merseyside L3 5DA United Kingdom enquiries@bodc.ac.uk http://www.bodc.ac.uk/ pointOfContact 2018-02-06T15:16:38 MEDIN Discovery Metadata Standard Version 2.3.8 urn:ogc:def:crs:EPSG::4326 OGP Dover-Sangatte (Dover Strait) cable voltage series (1955-1969) British Oceanographic Data Centre record 1048037 2017-10-03 publication 2010-09-28 creation 2010-09-28 revision EDMED178 http://www.bodc.ac.uk/ The data set comprises continuous hourly recordings of electrical potential across the Dover Strait, which relate to the flux of water, over the period 1955-1965 and part of 1968-1969, together with parallel measurements of sea temperature and pressure. Voltages on telegraph cables were measured almost continuously by pen recording milliammeters installed at Dover since 1954. The d.c. potential between the inner conductor of the cable and its screen is measured through a 2.2 kohm resistor in series with a milliammeter, whose internal resistance was of order 1 kohm. The screen was earthed at both the English and French ends, and at the French end the conductor is also effectively earthed (through inductive elements) as far as low frequency voltage variations were concerned. Thus the voltage recorded at St. Margaret's Bay is effectively the difference in earth potentials between the particular coastal points in England and France. A 0.003F capacitance in parallel with the milliammeter shunted out voltage variations with time scales less than about half a minute. For calibration, a standard voltage cell was switched in place of the cable on occasions. For parallel measurements of sea temperature (related to conductivity) and local wind conditions, 6-hourly temperatures and barometric pressures from the Noord Hinder Light Vessel, the pressures from the Terschellinger Bank Light Vessel and the 6-hourly pressures from Gorlston (East Anglia) were used. Data for sea salinity at the Varne Light Vessel were extracted from International Council for the Exploration of the Sea (ICES) publications. Unknown Institute of Oceanographic Sciences, Bidston Laboratory Unknown Bidston Observatory Bidston Hill Prenton Merseyside L43 7RA United Kingdom inapplicable originator British Oceanographic Data Centre Director Joseph Proudman Building 6 Brownlow Street Liverpool Merseyside L3 5DA United Kingdom enquiries@bodc.ac.uk http://www.bodc.ac.uk/ custodian asNeeded Natural Environment Research Council Designated Data Centres Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 revision unknown Vertical Coverages 2013-02-06 revision Vertical velocity of the water column (currents) Air pressure Wind strength and direction Salinity of the water column Temperature of the water column Electrical conductivity of the water column Horizontal velocity of the water column (currents) SeaDataNet PDV 2018-01-12 revision Atmospheric conditions Meteorological geographical features Oceanographic geographical features INSPIRE themes 2009-07-31 revision Usage restrictions are specified in the terms of the licence otherRestrictions Data are freely available to all following agreement to the terms and conditions of a Data Licence English oceans climatologyMeteorologyAtmosphere 0.00 2.00 50.00 52.00 1955 1969 Publication year: 1977-01-01 Publication title: An analysis of 10 years' voltage records from the Dover-Sangatte cable. Publication authors: Alcock, G.A. and Cartwright, D.E. Publication editors: IOS Report British Oceanographic Data Centre Director Joseph Proudman Building 6 Brownlow Street Liverpool Merseyside L3 5DA United Kingdom enquiries@bodc.ac.uk http://www.bodc.ac.uk/ distributor dataset Instrument(s) used to collect data: anemometers; meteorological packages; sea level recorders; current meters; salinity sensor.