Mud content of North Sea surface sediments

Abstract:
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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Metadata Information

General

General information section
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fileIdentifier/identifierde.dkrz.wdcc.iso3580506
language
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hierarchyLevelName
  • coastMap_Substrate_Mud
contactsee section contact (role: pointOfContact)
dateStamp 2020-04-23T02:33:12
metadataStandardNameISO 19115
metadataStandardVersionISO 19139 / DKRZ ISO Simple Profile V1.0
referenceSystemInfo
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identificationInfo

Identification information section
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citation
  • title:
    • Mud content of North Sea surface sediments
  • dates:
    • creation: 2017-11-24
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    • see section contact (role: distributor)
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    • doi:10.1594/WDCC/coastMap_Substrate_Mud
abstract see above
status
purpose
pointOfContactsee section contact (role: originator)
graphicOverview
resourceMaintenance
  • maintenanceAndUpdateFrequency:
  • updateScope:
  • maintenanceNote:
descriptiveKeywords:
  • theme:
    • geodata
  • theme:
    • seafloor conditions
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Contact

Role: pointOfContact

Contact information section
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individualNameDr. Frank-Detlef Bockelmann
organisationNameHelmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH
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  • address:


  • email:

Role: distributor

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    Role: originator

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    organisationNameHelmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH
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    contentInfo

    Content information section
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    CoverageDescription:
    • attributeDescription
      • Mud
    • contentType
      • modelResult

    distributionInfo

    Distribution information section
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      • zip-file (gco:nilReason=)
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    Data Quality information section
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