Identification

Title

2007 - 2008 Centre for Environment, Fisheries & Aquaculture Science (Cefas) 2007-2008 North Sea Sediment Pigment and Porosity Analysis

Abstract

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.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/909/

function: order

Unique resource identifier

code

CEFAS7c2c2d5c-9f52-4f82-8d50-66f328a8febe

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

2

East bounding longitude

5

North bounding latitude

55.75

South bounding latitude

53

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

2007-01-01

End position

2008-12-31

Dataset reference date

date type

publication

effective date

2019-11-20

Frequency of update

notPlanned

Quality and validity

Lineage

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 cm ^... and a seawater density of 1.035 g cm ^... . 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

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

2019-11-20T10:55:50

Metadata language