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  Median grain size of North Sea surface sediments

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.

 
Citation proposal
Dr. Frank-Detlef Bockelmann (Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH). Median grain size of North Sea surface sediments. https://gdk.gdi-de.org/geonetwork/srv/api/records/de.dkrz.wdcc.iso3565414
 

Simple

Alternate title
Median grain size of North Sea surface sediments
Date ( Creation )
2017-11-16
Identifier
None
Identifier
doi:10.1594/WDCC/coastMap_Substrate_MGS / Median grain size of North Sea surface sediments

  Originator

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  

  Originator

Center for Earth System Research and Sustainability, University of Hamburg - Prof. Dr. Kay-Christian Emeis  
Website
http://www.cen.uni-hamburg.de/  

  Originator

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  
Other citation details
doi:10.1594/WDCC/coastMap_Substrate_MGS

  Author

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  

  Point of contact

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dipl.-Geogr. Ulrike Kleeberg  
Keywords ( Theme )
  • seafloor conditions
Keywords ( Theme )
  • geodata
Metadata language
eng English
N
S
E
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Begin date
1960-01-01
End date
2014-12-31
Distribution format
  • zip-file (zip-file )

Distributor

  Distributor

 
Units of distribution
Mb
Transfer size
1
OnLine resource
http://doi.org/doi:10.1594/WDCC/coastMap_Substrate_MGS  
Hierarchy level
series Series

gmd:MD_Metadata

File identifier
de.dkrz.wdcc.iso3565414   XML
Hierarchy level
series Series
Hierarchy level name
coastMap_Substrate_MGS
Date stamp
2022-04-23T04:26:56
Metadata standard name
ISO 19115
Metadata standard version
ISO 19139 / DKRZ ISO Simple Profile V1.0

  Author

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  

  Point of contact

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dipl.-Geogr. Ulrike Kleeberg  

  Originator

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  

  Originator

Center for Earth System Research and Sustainability, University of Hamburg - Prof. Dr. Kay-Christian Emeis  
Website
http://www.cen.uni-hamburg.de/  

  Originator

Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH - Dr. Frank-Detlef Bockelmann  
Dataset URI
http://doi.org/doi:10.1594/WDCC/coastMap_Substrate_MGS
 
 

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