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Metadata: Acoustic backscatter profile data for Mixed Layer Depth for the Peltic surveys in the eastern Celtic Seas and English Channel from 2012 to 2019
Abstract:
Backscatter data at 200 kHz recorded with a calibrated multifrequency Simrad EK60 system (additional frequencies, 38, 120 and 333 kHz) as part of fisheries survey Peltic designed to map and quantify the pelagic fish community. Peltic is an ongoing annual autumn pelagic survey on the research vessel Cefas Endeavour in the English Channel, Celtic Sea and Bristol Channel running from 2012-present. This data includes October surveys from 2012-2019. Also included are survey strata to show sampling locations.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 10914 |
| 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. | Acoustic backscatter profile data for Mixed Layer Depth for the Peltic surveys in the eastern Celtic Seas and English Channel from 2012 to 2019 |
| 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. | CEFASde86e821-2cc7-444e-b720-3a5214e54840 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS22352 |
| 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 | 2012-10-23 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2019-10-28 |
| 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'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Backscatter data at 200 kHz recorded with a calibrated multifrequency Simrad EK60 system (additional frequencies, 38, 120 and 333 kHz) as part of fisheries survey Peltic designed to map and quantify the pelagic fish community. Peltic is an ongoing annual autumn pelagic survey on the research vessel Cefas Endeavour in the English Channel, Celtic Sea and Bristol Channel running from 2012-present. This data includes October surveys from 2012-2019. Also included are survey strata to show sampling locations. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Mean volume backscattering strength profiles (Sv) at 200kHz exported ping by ping. The export was done on the Sv after resampling (10 pings horizontally and 0.3 m vertically) and median filtering. The profiles are organized in rows with one row representing one ping. No Sv threshold was applied. Strata are defined based on ecologically coherent areas each of which is acoustically sampled by a series of transects. Please see paper for more information; `Relationships between acoustic scattering layers and ocean stratification: An acoustic approach to estimate mixed layer depth`_ .. _`relationships between acoustic scattering layers and ocean stratification: an acoustic approach to estimate mixed layer depth`: https://doi.org/10.1002/lom3.70010 |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Acoustic backscatter in the water column |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Water column | |
| 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 | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53 |
| East | The eastern-most limit of the data resource in decimal degrees | -1.5 |
| South | The southern-most limit of the data resource in decimal degrees | 48 |
| West | The western-most limit of the data resource in decimal degrees | -7.5 |
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
| defra.helpline@defra.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/22352 |
| Locator name | Name of the web resource | Cefas Data Portal |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | noLimitations | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | |
| 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. | 2025-10-24 |
| Date of last revision | The most recent date that the resource was revised. | 2026-02-11 |
| Date of creation | The date that the resource was created. | 2025-10-21 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-02-11 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.1 |