8eeecbb0-8883-4156-b547-9a8f273b7050 English series series 2026-05-27T11:51:33 MEDIN 3.1.2 geoscientificInformation oceans Carbon concentrations in sediment SeaDataNet Parameter Discovery Vocabulary 2026-04-23 revision Sediment grain size parameters SeaDataNet Parameter Discovery Vocabulary 2026-04-23 revision Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Offshore Cable Corridor The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Soil GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Species distribution GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaDataNet sea areas 2012-11-07 revision English Channel SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision soil and sediment 2011-05-19T00:00:00 2012-06-13T23:59:59 1.18221415492963 1.26099093245853 51.7105268136316 51.7529100147345 TCE-551 Marine Data Exchange 2011-2012, CMACS, Gunfleet Sands 1 and 2, Years 2 and 3 Benthic Monitoring Years 2 and 3 Benthic Monitoring 2021-05-17T13:39:40 publication English The reports present results and analysis of benthic environmental data collected as part of a monitoring programme at Gunfleet Sands Offshore Wind Farm in year 2 (2011) and year 3 (2012). Origin: NIRAS Consulting Ltd There will be no limitations when published on the Marine Data Exchange otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Centre for Marine and Coastal Studies Ltd (CMACS) +44 (0) 1513 277 177 info@cmacsltd.co.uk originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Orsted info@orsted.com owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-551/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series Grab samples were obtained using a standard weighted 0.1m2 Day grab; this was the same design used in the 2007 and 2010 benthic surveys. This design of grab is appropriate for use at the survey area where the predominant sediment is fine sand/mud. The grab was deployed using a hydraulic winch while the vessel was held stationary over the target by dynamic positioning linked to differential GPS, providing sub-metre positional accuracy for the vessel and 1-3m accuracy for the deployed grab depending on water depth and currents. In 2011 all samples were taken within 8 metres of the target position (details in Appendix 1). Mean distance to target was <2m. Survey protocol required that samples be rejected if they were of less than 5 litres (or 2.5 litres on hard-packed sands). Upon retrieval of a successful grab, sampled position, date, time and water depth were recorded (details in Appendix 1 and Appendix 2). A digital photograph of the contents of each faunal grab was taken after draining (unwashed) over a 1mm sieve. Notes were made on sediment type, colour including any signs of anoxia, volume, obvious species observed and the presence of potential Annex 1 habitat indicators (e.g. aggregations of Sabellaria spinulosa). After initial observations, photographs and once excess water had been allowed to drain away (but before washing); a representative sub-sample amounting to approximately 500ml was removed for particle size analysis (PSA) and total organic carbon (TOC) analysis using a plastic spoon. These sub-samples were stored in a cool box in labelled foil trays and frozen immediately upon arrival back at the CMACS Ltd laboratory (1 day after the end of the survey and within 2 days of collection). Once the sub-sample had been removed, each sample was gently washed through a 1mm mesh using a low pressure seawater hose. Sediments passing through the sieve were discarded and the material retained on the sieve transferred to a labelled bucket. A separate waterproof label duplicating the external label was placed inside the sample bucket. All samples were fixed with phosphate buffered 10% formalin in seawater to a final formalin concentration of approximately 5% on arrival back ashore. ABP Marine Environmental Research Ltd 02380711840 enquiries@abpmer.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84