Identification

Title

2009-2011 North Sea and English Channel Sediment Profiling Image Analysis

Abstract

SPI images providing photographic profiles of the upper layers of seabed sediments (to c. 30 cm depth) at sampling sites in the North Sea and English Channel, used to measure the depth of the aRPD (apparent Redox Potential Discontinuity) layer, a colour change in the sediment profile which approximates the depth to which oxygen penetrates the sediment.

Resource type

dataset

Resource locator

https://data.cefas.co.uk/view/696

name: Cefas Data Portal

description: The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV.

function: download

Unique resource identifier

code

CEFAS696

codeSpace

https://data.cefas.co.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

oceans

Keywords

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

revision

effective date

2011-03-25

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

revision

effective date

2010-05-18

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Geographic location

West bounding longitude

-6.00

East bounding longitude

5.00

North bounding latitude

56.75

South bounding latitude

49.00

Temporal reference

Temporal extent

Begin position

2009-01-01

End position

2011-12-31

Dataset reference date

date type

publication

effective date

2013-11-21

date type

revision

effective date

2023-01-31

date type

creation

effective date

2013-01-22

Frequency of update

notPlanned

Quality and validity

Lineage

Sediment Profile Imagery (SPI) is a useful technique to study in situ seafloor organisms and processes that cannot be directly observed via other equipment (i.e. grabs). The instrument acts like an inverted periscope and pushes slowly into the surface sediments to take high quality digital photographs of the upper sediment layers (to a macimum of C. 30 cm depth) and the sediment/water interace. The instrument used was an Ocean Imaging Systems model 3731-D. The sampling protocol required five replicate samples to be collected at each station, which was achieve by 'hopping' the SPI across the seabed by about 10 m per hop. This set of images was collected during Cefas Cruises CEND 15/09, CEND 11/10 and CEND 11/11. Those for CEND 15/09 and CEND 10/11 are stored in a 2-level folder structure, the first level identifying the Cruise and the second identifying the Date, Station Code and Station Number of the sampling event (e.g. '20100608 OG Stn 67'). Those for CEND11/11 are in a single folder with each filename identifying the Station Code and the sequential number of the image (e.g. 'C12_008.JPG'. Note that two photos were taken per 'hop', the best one being retained for analysis). The images were collected as part of the Defra funded project ME5301 entitled "Mapping the structure, function and sensitivity of seabed sediment habitats to support assessment of the sea-floor status and the broadscale monitoring and management of the benthic environment". Further details of the project can be found at `http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=2&ProjectID=16812`_ .. _`http://randd.defra.gov.uk/default.aspx?menu=menu&module=more&location=none&completed=2&projectid=16812`: http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=2&ProjectID=16812

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2013-12-10

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

true

explanation

See the referenced specification

Data format

name of format

Unknown

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Responsible organisations

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

custodian

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

distributor

Responsible party

organisation name

Department for Environment, Food and Rural Affairs (DEFRA)

email address

defra.helpline@defra.gov.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2023-01-31T04:09:11

Metadata language