Identification

Title

1982 - 2004 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Seawater temperature records for the UK Shelf - 04 - Cefas Plankton Analysis System

Abstract

This dataset has been extracted as part of an exercise to assemble "all" Cefas Temperature Data and publish it in a Data paper. It is one of 17 Cefas data sources assembled. Sampling of plankton has been carried out by Cefas since the 1940’s. In recent decades sampling has mainly been concentrated on fish eggs and larvae, and other zooplankton. Samples were collected using ‘high–speed towed nets’ that capture plankton from the surface to near–seabed. At each sampling position the sampler was deployed in an oblique tow from the surface to within approximately 2 m of the seabed. Veering and hauling speeds were manually adjusted with the aim of sampling each depth band equally. Since the early 1980’s CTD sensor packages were fitted to the plankton samplers to continuously monitor temperature and salinity throughout each deployment. From 1982 until 2003 the Guildline CTD system was used. Subsequently the ESM2 Profiler/mini CTD Logger (see 3.17) has been used. For each sampler deployment a raw data file was created from the logged values. Data were logged at intervals varying from 2 to 5 seconds. Raw files were subsequently post–processed using custom–written software (two different packages over the time period covered here) to produce calibrated profiles of the environmental values measured. Depending on the software used and level of post–processing undertaken by the operator either the whole profile (i.e. both dive and haul portions of the deployment) or just the dive part of the profile, were derived. Pressure averaged profiles may also have been created where mean values were ‘binned’ into depth bands of 1 m width. Pressure (Depth), Temperature and Conductivity (CTD) profiles collected on Cefas (or DFR) plankton research cruises. The data in this archive broadly cover the European Shelf. Original output files are varied in data format according to the collection system used and the level of post-processing carried out.

Resource type

series

Resource locator

http://data.cefas.co.uk/#/View/3235/

function: order

Unique resource identifier

code

CEFASa981849d-c6b0-440a-8c48-56560f80b6bf

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Additional information source

`https://www.cefas.co.uk/publications/techrep/tech95.pdf`_ Examples of the outputs of the Cefas Plankton Analysis System can be found using the following search term on the Cefas Data Hub `http://data.cefas.co.uk/#/Search/1/plankton`_ .. _`https://www.cefas.co.uk/publications/techrep/tech95.pdf`: https://www.cefas.co.uk/publications/techrep/tech95.pdf .. _`http://data.cefas.co.uk/#/search/1/plankton`: http://data.cefas.co.uk/#/Search/1/plankton

Classification of spatial data and services

Topic category

oceans

Keywords

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

-50

East bounding longitude

20

North bounding latitude

70

South bounding latitude

40

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

1982-04-29T00:00:00.000Z

End position

2004-03-08T00:00:00.000Z

Dataset reference date

date type

publication

effective date

2019-12-10

Frequency of update

notPlanned

Quality and validity

Lineage

Data collected using the lowered CTD rosette system, which is used when the vessel is stationary, provide a vertical profile of the water column. CTD data collected via sensors mounted to the plankton sampler provide an oblique or 'V' shaped profile of the water column. For these surveys, the CTD sensor used was either a Guildline or Falmouth Scientific Instruments Integrated CTD. Instruments were usually calibrated where possible before each survey, in a water bath for temperature and using a pressure test vessel for pressure. Calibrations for salinity were performed with reference to salinity samples collected.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2019-12-10T13:22:46

Metadata language