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2015

66 record(s)
 
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From 1 - 10 / 66
  • A composite Habitats Directive Annex I feature extent map of Submarine structures made by leaking gases for the Braemar Pockmarks SAC was created by British Geological Survey for JNCC to provide the most up-to-date knowledge of Methane-Derived Authigenic Carbonate (MDAC) coverage within the site. Existing polygon data from the 2012 JNCC/CEFAS survey (CEND19x/12 ) was combined groundtruthing information (PB and BGS datasets), to build a composite understanding of “High” and “Potential” Annex I feature within the site.

  • Confidence in kinetic energy due to currents at the seabed in the Black Sea, created by the EMODnet Seabed Habitats project consortium. Values are on a range from 1 (Low confidence) to 3 (High confidence). The confidence assessment considered factors such as: • Quality of training data and methods used to construct the model. • Temporal resolution. • Spatial resolution Detailed information on the confidence assessment in Populus J. et al 2017. EUSeaMap, a European broad-scale seabed habitat map. Ifremer. http://doi.org/10.13155/49975

  • 90th percentile Kinetic energy due to currents at the seabed in the Iberian Peninsula - Created by the MARETEC team at Instituto Superior Técnico (IST) (Technical University of Lisbon, Portugal) using WAVEWATCH III model. For the purpose of MeshAtlantic Project, values were integrated over 3 years. Values are averages of annual percentiles 90th. The spatial resolution of the dataset is 0.06 decimal degrees (5km)

  • This dataset contains the habitats map from the SCI (Site of Community Importance) “Espacio marino de Illes Columbretes”. The Columbretes Islands, a series of small islands, islets and submerged elevations of volcanic origin, are found in the Western Mediterranean at the northern limit of the Gulf of Valencia, 28 miles from the Gulf of Oropesa and just over 50 kilometers from the coast to the east of Castellón de la Plana. There are 24 islets gathered in 4 groups each named after its largest landmass. This volcanic field covers an area of 90 by 40 kilometers at a depth of 80 to 90 metres. The Illa Grossa and the other islands and islets are formed from basaltic materials or phonolitic rocks. These islands and the associated submerged volcanic field are one of the rare examples of Quaternary volcanism in the Mediterranean. This study was supported by the INDEMARES-LIFE+ Project, EC contract INDEMARES-LIFE+ (07/NAT/E/000732): Inventory and Designation of the Natura 2000 network in marine areas of the Spanish State (www.indemares.es/en). This work was coordinated by the Biodiversity Foundation (www.fundacion-biodiversidad.es). This study was made possible through the collaboration of multiple teams of researchers: Department of Ecology (University of Barcelona - UB), Center for Advanced Studies of Blanes (CEAB - CSIC), Institute of Marine Sciences (ICM - CSIC), Balearic Oceanography Centre (COB) - IEO (Spanish Institute of Oceanography) and Consolidate Research Group Marine Geosciences (GRC-GM) (University of Barcelona - UB). Habitats are classified according to EUNIS nomenclature and the List of Marine Habitats in Spain (LPRE, that it’s classified hierarchically and was completed and published in March 2013). Habitats classification are been simplified owing to the requirements of the EMODnet (European Marine Observation and Data Network) portal for Seabed Habitats.

  • A composite Habitats Directive Annex I feature extent map of Submarine structures made by leaking gases for the Scanner Pockmarks SAC was created by British Geological Survey for JNCC to provide the most up-to-date knowledge of Methane-Derived Authigenic Carbonate (MDAC) coverage within the site. Existing polygon data from the 2012 JNCC/CEFAS survey (CEND19x/12 ) was combined with information extracted from previous surveys. Backscatter data and side scan sonar data was used to characterise the nature of the seafloor, in particular the presence of methane-derived authigenic carbonate (MDAC), to build a composite understanding of “High” and “Potential” Annex I feature within the site.

  • 90th percentile Kinetic Energy due to waves at the seabed in the North East Atlantic Sea, Greater North Sea and Celtic Seas in N m2/s - Created for the EMODnet Seabed Habitats broad-scale habitat map (EUSeaMap 2016). This dataset is a raster composite of the outputs of several models, created for display in the EMODnet Seabed Habitats portal. North Sea and Celtic Seas offshore (>6km from coast): NOC ProWAM model with a resolution of 12.5 km offshore run for a period of 5 years (2000-2005); North Sea and Celtic Seas inshore (<6km from coast): DHI MIKE21 Spectral wave model with a resolution of 100-300m run for a period of 5 years (2000-2005); French coasts: the data is derived from the French Previmer archives for the years 2000 to 2004, at a resolution of 250m; Bay of Biscay, inc. northern Spain and Southern Irish Sea: the data is derived from Ifremer's IOWAGA project hindcast archives (Roland and Ardhuin, 2014) using the WAVEWATCH III™ model (Tolman, 2009), run for a period of 5 years (2000-2005), the resolution is 300 m inshore, 3 km offshore. Iberian peninsula and Azores: WAVEWATCH III™ model (Tolman, 2009) run for 3 years with 4 km resolution

  • Confidence in 90th percentile Kinetic energy due to currents at the seabed along Portuguese coasts. Values are on a range from 1 (Low confidence) to 3 (High confidence). The confidence assessment considered factors such as: • Quality of training data and methods used to construct the model. • Temporal resolution. • Spatial resolution Detailed information on the confidence assessment in Populus J. et al 2017. EUSeaMap, a European broad-scale seabed habitat map. Ifremer. http://doi.org/10.13155/49975

  • Broadscale habitat (EUNIS level 3) for the Cromer Shoals Chalk Beds recommended Marine Conservation Zone (rMCZ).Seabed texture polygons mapped using semi automated ISO cluster unsupervised classification and expert interpretation of acoustic data (MBES bathymetry and backscatter) and groundtruthing data from PSA analysis and image (stills and video) classification.

  • 90th percentile Kinetic Energy due to currents at the seabed in the Adriatic Sea - units in N m2/s. Data derived from the Tessa project archives (resolution 2.2 km, years: 2011-2014).

  • A geostatistical analysis of the data is reported leading to the selection of a linear model of corregionalization for the composition of the sediment, based on the additive log-ratio transformation of data on mud, sand and gravel content. This model is then used for spatial prediction on a 250-m grid. At each grid node a prediction distribution is obtained, conditional on neighbouring data and the selected model. By sampling from this distribution, and backtransforming onto the original compositional simplex of the data, we obtain a conditional expectation for the proportions of sand, gravel and mud at each location, a 95% confidence interval for the value at each node, and the probability that each of the four sediment texture classes that underlie the EUNIS habitat classification is found at the node.