de.dkrz.wdcc.iso3580506 series coastMap_Substrate_Mud Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH author Dipl.-Geogr. Ulrike Kleeberg Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH pointOfContact Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH originator Prof. Dr. Kay-Christian Emeis Center for Earth System Research and Sustainability, University of Hamburg http://www.cen.uni-hamburg.de/ originator Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH originator 2022-04-25T04:31:43 ISO 19115 ISO 19139 / DKRZ ISO Simple Profile V1.0 http://doi.org/doi:10.1594/WDCC/coastMap_Substrate_Mud Mud content of North Sea surface sediments Mud content of North Sea surface sediments 2017-11-24 creation None Mud content of Noarth Sea surface sediments doi:10.1594/WDCC/coastMap_Substrate_Mud Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH originator Prof. Dr. Kay-Christian Emeis Center for Earth System Research and Sustainability, University of Hamburg http://www.cen.uni-hamburg.de/ originator Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH originator doi:10.1594/WDCC/coastMap_Substrate_Mud 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. Dr. Frank-Detlef Bockelmann Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH author Dipl.-Geogr. Ulrike Kleeberg Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH pointOfContact seafloor conditions theme geodata theme eng -5.0 12.0 50.0 62.0 1960-01-01 2014-12-31 1 Mud modelResult % zip-file zip-file distributor Mb 1 http://doi.org/doi:10.1594/WDCC/coastMap_Substrate_Mud series