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Mud content of North Sea surface sediments
abstract:
In grain size analysis, the proportion of particles with a diameter of less than 63 µm is commonly referred to as the mud content of a sediment sample. The mud content is an important biophysical variable that often can be mapped with a quantifiable correspondence to organic matter, contaminants and the occurrence of benthic species and assemblages. Thismap conveys information on the percentage mud content of seabedsediments in the North Sea. It has been produced with multivariate geostatistics (external drift kriging) using water depth as a trend variable. The underlying data set is a compilation of over 30,000 sediment samples from many national and Europaen surveys conducted over a period of more than 50 years. Due to the vintage of some samples in the database, users are advised to consider the dynamic nature of the seafloor when using the data and when creating derived surrogate based habitatmaps. Also, due to the diversity of sources for the pointdata, users should be aware of the differing methods by which the grain size analyses were conducted. As a consequence, map confidence is not necessarily uniform and thus areas not always comparable, even though the interpolation surface may look continuous.
purpose:
The map shows the percentage mud content (silt + clay) of surface sediments in the North Sea predicted by interpolation of legacy grain size distribution data. It has been produced to aid in describing physical habitat characteristics and to supply consistent baseline data and boundary conditions for ecological and biophysical modelling.
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Citation proposal
Dr. Frank-Detlef Bockelmann (Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH). Mud content of North Sea surface sediments. https://gdk.gdi-de.org/geonetwork/srv/api/records/de.dkrz.wdcc.iso3580506 |
Simple
- Alternate title
- Mud content of North Sea surface sediments
- Date ( Creation )
- 2017-11-24
- Identifier
- None
- Identifier
- doi:10.1594/WDCC/coastMap_Substrate_Mud / Mud content of Noarth Sea surface sediments
Originator
- Other citation details
- doi:10.1594/WDCC/coastMap_Substrate_Mud
Point of contact
- Keywords ( Theme )
-
- seafloor conditions
- Keywords ( Theme )
-
- geodata
- Metadata language
- eng English
))
- Begin date
- 1960-01-01
- End date
- 2014-12-31
- Distribution format
-
- zip-file (zip-file )
Distributor
- Units of distribution
- Mb
- Transfer size
- 1
- OnLine resource
- http://doi.org/doi:10.1594/WDCC/coastMap_Substrate_Mud
- Hierarchy level
- series Series
gmd:MD_Metadata
- File identifier
- de.dkrz.wdcc.iso3580506 XML
- Hierarchy level
- series Series
- Hierarchy level name
- coastMap_Substrate_Mud
- Date stamp
- 2022-04-25T04:31:43
- Metadata standard name
- ISO 19115
- Metadata standard version
- ISO 19139 / DKRZ ISO Simple Profile V1.0
Point of contact
Originator
Overviews
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