CEFAS7c2c2d5c-9f52-4f82-8d50-66f328a8febe 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 2023-01-31T04:52:09 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 2007-2008 North Sea Sediment Pigment and Porosity Analysis 2013-11-21 publication 2023-01-31 revision 2013-03-06 creation CEFAS909 https://data.cefas.co.uk Measurements of Chlorophyll A concentrations and porosity in sediment samples collected by box core from a range of soft sediments from sites at North Dogger Bank, Oyster Ground and Sean Gasfield in the North Sea. 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 Sea bed Sediment GEMET, version 1.0 2008-06-01 publication Chlorophyll pigment concentrations in the water column Sediment water content, porosity and surface area SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Pigments SeaDataNet P03 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 2.00 5.00 53.00 55.75 2007-01-01 2008-12-31 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/909 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, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. 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 Porosity is the fraction of void space in a material. Here the material is sediment and the voids between the sediment grains are filled with seawater. Porosity (symol Φ, phi) is expressed as the volume of the void divided by the volume of the whole sample, so is given as a fraction between 0 and 1. Intact sediment cores were either sliced in 1 cm horizons to a depth of 10 cm, or treated as two bulk samples (0-5 cm, and 5-10 cm). Porosity was calculated using the dry weight and wet weight of known volumes of sediment, assuming a sediment particle density of 2.7 g cm3 and a seawater density of 1.035 g cm3. Chlorophyll concentration was determined by Fluorometry, following a standard operating procedure (SOP). Records include data from Defra funded project ME3205 entitled "Marine Ecosystem Connections: carbon and nitrogen fluxes through the benthic and pelagic domains" which sampled three fixed stations in the North Sea. Semi-autonomous in situ systems were deployed at each study site to follow temporal changes in environmental conditions such as temperature, light, nutrients, and chlorophyll fluorescence. Detailed studies of pelagic and benthic food webs were carried out during 8 research cruises spaced to capture seasonal changes (February , April, May, September, and October/November 2007; January, April and September 2008). Cruise sampling was focussed on identifying ecosystem structure, in terms of seabed types, physics, chemistry, and the abundance (as numbers and/or biomass) and diversity of planktonic and benthic communities (from micro- to macro- organisms). Experimental work was carried out to obtain estimates of the rates of key processes such as primary production, zooplankton secondary production, carbon cycling, and nutrient fluxes across the sediment-seawater interface (see Painting et al. 2010) Further details of the project can be found at: `http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=13011`_ .. _`http://randd.defra.gov.uk/default.aspx?menu=menu&module=more&location=none&completed=0&projectid=13011`: http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=13011 MEDIN 3.1.1