CEFASf64e2193-3e64-46ef-b24e-0914591d564c English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2023-01-31T04:09:11 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 2009-2011 North Sea and English Channel Sediment Profiling Image Analysis 2013-11-21 publication 2023-01-31 revision 2013-01-22 creation CEFAS696 https://data.cefas.co.uk 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. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner notPlanned Biochemistry Advice Analysis Management Monitoring Eutrophication Sea bed Sediment GEMET, version 1.0 2008-06-01 publication Rock and sediment physical properties SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Sediment water content, porosity and surface area Seabed photography SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Sediment SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English oceans -6.00 5.00 49.00 56.75 2009-01-01 2011-12-31 Delimited Unknown https://data.cefas.co.uk/view/696 Cefas Data Portal download 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. dataset INSPIRE Data Specification on Oceanographic geographical features – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification 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 MEDIN 3.1.1