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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.
British Oceanographic Data Centre
Data are freely available to all following agreement to the terms and conditions of a Data Licence
Other details | ||
Internal code | Internally assigned metadata identifier | 1709 |
Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Dover-Sangatte (Dover Strait) cable voltage series (1955-1969) |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | British Oceanographic Data Centre record 1048037 |
File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | e70a63111c5357cda85118b84c61dd70 |
Resource Identifier | This is the code assigned by the data owner. | EDMED178 |
Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 1955 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 1969 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | asNeeded |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | 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. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Instrument(s) used to collect data: anemometers; meteorological packages; sea level recorders; current meters; salinity sensor. |
Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | 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 |
Related keywords | ||
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Natural Environment Research Council Designated Data Centres |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | unknown | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Vertical velocity of the water column (currents) | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Air pressure | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Wind strength and direction | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Salinity of the water column | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Temperature of the water column | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Electrical conductivity of the water column | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Horizontal velocity of the water column (currents) | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Atmospheric conditions | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Meteorological geographical features | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 52 |
East | The eastern-most limit of the data resource in decimal degrees | 2 |
South | The southern-most limit of the data resource in decimal degrees | 50 |
Responsible organisations | ||
Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
Organisation name | British Oceanographic Data Centre | |
Individual name | Polly Hadžiabdic | |
Position name | Head of the BODC Requests Team | |
Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
Postal code | L3 5DA | |
City | Liverpool | |
Administrative area | Merseyside | |
Country | United Kingdom | |
URL | http://www.bodc.ac.uk/ | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | British Oceanographic Data Centre | |
Position name | Director | |
Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
Postal code | L3 5DA | |
City | Liverpool | |
Administrative area | Merseyside | |
Country | United Kingdom | |
URL | http://www.bodc.ac.uk/ | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Institute of Oceanographic Sciences, Bidston Laboratory | |
Individual name | Unknown | |
Position name | Unknown | |
Delivery point | Bidston Observatory, Bidston Hill | |
Postal code | L43 7RA | |
City | Prenton | |
Administrative area | Merseyside | |
Country | United Kingdom | |
Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
Organisation name | British Oceanographic Data Centre | |
Position name | Director | |
Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
Postal code | L3 5DA | |
City | Liverpool | |
Administrative area | Merseyside | |
Country | United Kingdom | |
URL | http://www.bodc.ac.uk/ | |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | Data are freely available to all following agreement to the terms and conditions of a Data Licence |
21 Conditions for access and use – Use limitation | Any restrictions imposed on accessing the resource. | Usage restrictions are specified in the terms of the licence |
Version info | ||
Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2017-10-03 |
Date of last revision | The most recent date that the resource was revised. | 2010-09-28 |
Date of creation | The date that the resource was created. | 2010-09-28 |
Metadata date | The date when the content of this metadata record was last updated. | 2018-02-06 |
Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata Standard |
Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.8 |
© OpenStreetMap contributors