Identification

Title

2009 - 2011 Centre for Environment, Fisheries & Aquaculture Science (Cefas) 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

http://data.cefas.co.uk/#/View/696/

function: order

Unique resource identifier

code

CEFASf64e2193-3e64-46ef-b24e-0914591d564c

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

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

-6

East bounding longitude

5

North bounding latitude

56.75

South bounding latitude

49

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

2009-01-01

End position

2011-12-31

Dataset reference date

date type

publication

effective date

2016-07-14

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

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

2016-07-14T12:28:23

Metadata language