Mud content of Noarth 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.

 
Citation proposal
(2017) . Mud content of Noarth Sea surface sediments. https://gdk.gdi-de.org/geonetwork/srv/api/records/wdc-climate.de:3580506
 

INSPIRE

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wdc-climate.de:3580506   XML
Hierarchy level
collection collection
Online resource
Resource identifier
code
coastMap_Substrate_Mud
code
doi:10.1594/WDCC/coastMap_Substrate_Mud
Metadata language
eng; USA
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zip-file
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Coupled resource
 
 

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Keywords

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Keywords
  • geodata
Keywords
  • observational data
Keywords
  • seafloor conditions
Keywords
  • ship
 
 

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Date ( Publication )
2017-12-13
 

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Organisation name
Helmholtz-Zentrum Hereon
 

Responsible organization (s)

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Organisation name
Helmholtz-Zentrum Hereon
 

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Organisation name
Helmholtz-Zentrum Hereon
Organisation name
Helmholtz-Zentrum Hereon
Date stamp
2017-11-24T12:55:44
Metadata language
eng; USA
 
 

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Conformance class 3: harmonized

 
 

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