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EMODNET GEOLOGYCOMBINING INFORMATION ON SEA-BED SEDIMENTS
FOR PAN-EUROPEAN MARINE ASSESSMENTS
Anu Kaskela, Aarno Kotilainen, Ulla Alanen, Alan Stevenson, and EMODNET -Geology partners
Image: Google Earth, 2009
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• Integrate existing, but fragmented initiatives – To facilitate access to primary marine data – For public authorities, maritime services, related industries and
researchers.
• Multidisciplinary Expert Group set up 2008– Tenders for first scientific data projects issued July 7th 2008– Lots for Marine geology, chemistry, biology, hydrography
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EMODNET –Geology
The Baltic Sea, Greater North Sea and Celtic Sea.
• Co-ordinated by NERC/BGS• 3-year project• 14 partners
– Geological surveys of Finland, Latvia, Lithuania, Estonia, Poland, Germany, Denmark, Norway, Sweden, Netherlands, Belgium, France, Ireland and UK
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EMODNET –Geology
• 1: 1 million scale• OneGeology –Europe portal
Coherent datasets:• Sea-bed sediments (WP3)• Seafloor geology • Geological boundaries and faults• Rate of coastal erosion and
sedimentation• Geological events and event
probabilities• Seismic profiles and minerals
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EMODNET GeologyWP3, Sea-bed sediment map
Aims and objectives
• A full-coverage sea-bed substrate map – Collation, harmonisation, generalization– Integration with the hydrographic, chemical and biological lots– Highlight data gaps and deficiencies
• Accumulation rates
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EMODNET Geology; Sea-bed sediment map
→ COLLECTED MAPS ARE NOT UNIFORMSurvey methodology, Interpretation and Classification schemes differ
VSEGEI map from the Gulf of Finland
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EMODNET Geology; Sea-bed sediment mapHarmonisation
• Sediment maps are interpreted according to national standards
– Different classification schemes– Different grain size limits
• Maps need to be ”translated” into a shared scheme
• Integration with hydrographic, chemical and biological studies
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EMODNETSediment classification scheme
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EMODNET Geology; Sea-bed sediment mapHarmonisation
• Surface substrate (down to 30 cm depth)
• Existing sample data or expert -based prediction on potential surface materials
• Automatic interpolation– Sample archive– Reclassified samples
• Reclassification of the sediment map (~legend) according to surface material correlation
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EMODNET Geology; Sea-bed sediment mapGeneralization
• The target scale is 1: 1 million
• If not originally on this scale, the maps need to be generalized
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Substrate (Modified Folk)
EMODNET Geology; Sea-bed sediment mapCurrent status (2.7.2010)
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Sediment accumulation rates (cm/year)
• Based on the 137Cs
• Sedimentation rates have been between 0.01 and 2.75 cm/year (since 1986)
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This is not the end, this is just the beginning
• Confidence analysis & improvements• More layers• Case study areas to demonstrate that 1: 1 M is not enough
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Towards coherent marine geological information
• Science meets policy– Marine spatial planning– Geological data informs about natural resources and seabed
environment
• Integration and co-operation– Between geologists– Between natural scientists– Between disciplines
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Thank You!
Contact: [email protected]
Emodnet Substrate map2.7.2010/Baltic Sea
