Median grain size of North Sea surface sediments

Abstract:
purpose: The map shows the median grain size (or d50) 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. abstract: In grain size analysis, the median is the midpoint of the cumulative particles size distribution curve of a sediment sample. The median grain size is an important biophysical variable that relates to sediment stability and often can be mapped with a quantifiable correspondence to the occurrence of benthic species and assemblages. This map conveys information on the median grain size of seabed sediments in the North Sea. It has been produced with multivariate geostatistics (external drift kriging) using the percentage mud content as a trend variable. The underlying data set is a compilation of over 30,000 sediment samples from many national and European 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 habitat maps. 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 my look continuous.

Download plain xml file

To get the data: go to WIS-Portal

General

AttributeValue
fileIdentifier/identifierde.dkrz.wdcc.iso3565414
language
characterSet
hierarchyLevelseries
hierarchyLevelName
  • coastMap_Substrate_MGS
contactsee section contact (role: pointOfContact)
dateStamp 2019-04-21T01:38:24
metadataStandardNameISO 19115
metadataStandardVersionISO 19139 / DKRZ ISO Simple Profile V1.0
referenceSystemInfo
metadataExtensionInfo

identificationInfo

AttributeValue
citation
  • title:
    • Median grain size of North Sea surface sediments
  • dates:
    • creation: 2017-11-16
  • fileIdentifier:
  • citedResponsibleParty:
    • see section contact (role: distributor)
  • presentationForm:
  • otherCitationDetails:
    • doi:10.1594/WDCC/coastMap_Substrate_MGS
abstract see above
status
purpose
pointOfContactsee section contact (role: originator)
graphicOverview
resourceMaintenance
  • maintenanceAndUpdateFrequency:
  • updateScope:
  • maintenanceNote:
descriptiveKeywords:
  • theme:
    • geodata
  • theme:
    • seafloor conditions
resourceConstraints
  • MD_Constraints:
    • useLimitation:
  • MD_LegalConstraints:
    • accessConstraints:
    • useConstraints:
    • otherConstraints:
languageeng
characterSet
topicCategory
extentboundingExtent
  • description:
  • geographicElement:
    • westBoundLongitude:
    • eastBoundLongitude:
    • southBoundLatitude:
    • northBoundLatitude:
  • temporalElement:
    • beginPosition:
    • endPosition: (indeterminatePosition = )

Contact

Role: pointOfContact

AttributeValue
individualNameDr. Frank-Detlef Bockelmann
organisationNameHelmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH
contactInfo
  • address:


  • email:

Role: distributor

AttributeValue
individualName
organisationName
positionName
contactInfo
  • address:
    • phone:
    • email:
      • onlineResource:

      Role: originator

      AttributeValue
      organisationNameHelmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH
      contactInfo
      • phone:
      • facsimile:
      • address:


      • email:
      • onlineResource:

      contentInfo

      AttributeValue
      CoverageDescription:
      • attributeDescription
        • Median
      • contentType
        • modelResult

      distributionInfo

      AttributeValue
      distributionFormat
      • name:
        • zip-file
      • version:
        • zip-file (gco:nilReason=)
      • specification:
      transferOptions (onLine)
      • linkage/ URL:
      • protocol:
      • name:
      • description:

      dataQualityInfo

      AttributeValue
      scopeseries
      report
      • title:
      • date ():
      • explanation:
      • pass:
      lineage
      • statement:
      • processStep: