Identification

Title

1931 - 1968 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Cefas Historic Secchi Depth Measurements

Abstract

Secchi depth measurements, collected for studying the effects of the light climate on pelagic fish (e.g. fish school position in the water column compared to the depth of penetration of light); The dataset comprise 470 Secchi depth measurements collected in 1931, 1937, 1946-1950, 1968.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/946/

function: order

Unique resource identifier

code

CEFASc5e9689e-a465-4337-bc04-f297a6833d92

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

Classification of spatial data and services

Topic category

inlandWaters

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

Geographic location

West bounding longitude

-3

East bounding longitude

6

North bounding latitude

57

South bounding latitude

51

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

1931-05-12

End position

1968-03-22

Dataset reference date

date type

publication

effective date

2021-01-06

Frequency of update

notPlanned

Quality and validity

Lineage

The coordinates of each observation were generally not indicated in the logbooks and were derived from the associated station-sheets. Occasionally the exact coordinates were not specified but only the location of the sampling station was indicated; therefore the location name (e.g. Smiths Knoll) was used for deriving approximate coordinates. In other cases, the location was expressed as, for example, ‘4 miles SE of Smiths Knoll’; in such cases approximate coordinates were derived associating coordinates to Smiths Knoll and then using Google Earth for moving 4 miles SE of this position. Times of Secchi depth measurements were not available for each measurements, as well as weather condition description. Secchi depth measurements were converted from fathoms (or feet) into meters. Stations 4, 7, 8, 9, 10 & 11 from cruise 13/1949 were included in the initial dataset when released but only had coordinates accurate to 2 decimal places. They were therefore outliers and have been removed from the dataset.

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

2021-01-06T11:55:24

Metadata language