Predictor variables and groundtruth samples for north-west European continental shelf quantitative sediment analysis
Summary
Input data used to model sediment grain size for the north-west European continental shelf. Data includes: Sediment groundtruth observations with measured fractions of mud, sand and gravel, also converted to two additive log-ratios. These total 45761 samples. Also included are the eight predictor variables that were used to model sediment grain size. These were: Bathymetry, Bathymetric position index at a 50-pixel radii, Bathymetric position index at a 434-pixel radii, Distance from coast, Current speed at the seabed, Wave peak orbital velocity at the seabed, and suspended inorganic particulate matter for summer and winter as two separate variables.
Categories
Keywords
N/A
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Open Government LicenceAttribution statement
See Cefas Data Portal for details – link to dataset below.
Technical information
Update frequency
notPlanned
Lineage
Groundtruth observations were downloaded from a number of European government agencies and academic literature. A thorough filtering of samples was performed to delete samples collected prior to 1990 and samples where rounded sediment fractions were recorded (suggesting the values had been estimated and not quantitatively measured). Where sediment samples were located within the same pixel the mean of the sediment fractions was also calculated to produce an average value representative of that pixel. Predictor variables were downloaded from various sources. Bathymetry data and associated derivatives were downloaded from EMODnet bathymetry (`http://www.emodnetbathymetry.eu/`_ ). Current speed and Orbital velocity of waves at the seafloor were modelled by Cefas staff. Suspended inorganic particulate matter layers were derived from data downloaded from Copernicus online portal ( `http://marine.copernicus.eu/`_). .. _`http://www.emodnetbathymetry.eu/`: http://www.emodnetbathymetry.eu/ .. _`http://marine.copernicus.eu/`: http://marine.copernicus.eu/
Spatial information
Coordinate reference system
N/A
Geographic extent
- Latitude from: 48 to 63
- Longitude from: -13 to 11
Metadata information
Language
English
Metadata identifier
285d3da1-da6e-4aaf-a361-1cf7660592a1
Published by
Centre for Environment, Fisheries & Aquaculture Science
Contact publisher
data.manager@cefas.gov.ukDataset reference dates
Creation date
09 April 2019
Revision date
07 December 2023
Publication date
11 April 2019
Period
- From: 01 January 1990
- To: 01 January 2019
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