Seafloor litter - Density per trawl normalized per km² 2011/2021 v2021 ...

• Main Authors: IFREMER, SISMER, Scientific Information Systems For The SEA SISMER, Ifremer, VIGIES Information Valuation Service For Integrated Management And Monitoring, National Institute Of Oceanography And Applied Geophysics-OGS, Division Of Oceanography
• Format: Dataset
• Language: English
• Published: EMODnet Chemistry 2021
• Subjects: /Human Activities/Pollution; Oceanographic geographical features; Litter abundance and type; Sea-floor litter abundance; Black Sea; Baltic Sea; Mediterranean Sea; Arctic Ocean; Northeast Atlantic Ocean 40W; North Sea; EMODnet Chemistry; sediment; Marine litter; Seafloor litter; MSFD; Maps; Oceanography; FOS Earth and related environmental sciences; Arctic; Northeast Atlantic
• Online Access: https://dx.doi.org/10.13120/afe2d718-41e6-4bb4-95f5-ad836a45c891; https://sextant.ifremer.fr/documentation/emodnet_chemistry/api/catalogue.html#/metadata/afe2d718-41e6-4bb4-95f5-ad836a45c891

This visualization product displays the density of seafloor litter per trawl per year. EMODnet Chemistry included the collection of marine litter in its 3rd phase. Since the beginning of 2018, data of seafloor litter collected by international fish-trawl surveys have been gathered and processed in the EMODnet Chemistry Marine Litter Database (MLDB). The harmonization of all the data has been the most challenging task considering the heterogeneity of the data sources, sampling protocols (OSPAR and MEDITS protocols) and reference lists used on a European scale. Moreover, within the same protocol, different gear types are deployed during fishing bottom trawl surveys. In cases where the wingspread and/or number of items were unknown, data could not be used because these fields are needed to calculate the density. Data collected before 2011 are affected by this filter. When the distance reported in the data was null, it was calculated from: - the ground speed and the haul duration using this formula: Distance ...