Relationship between floating marine debris accumulation and coastal fronts in the Northeast coast of the USA.

Floating marine debris (FMD) is one of the world's most concerning issues due to its potential impact on biodiversity, communities, and ecosystem services. FMD transport and concentrations are driven by fronts, generated by oceanographic processes, and the accumulation of FMD has been reported in gyres, eddies, tidal fronts, salinity fronts, and coastal fronts. This study explores the relationship between fronts and FMD accumulation in the Gulf of Maine (GoM) and the surrounding coastal areas (USA). Frontal edge detection algorithms were applied to sea surface temperature (SST) imagery from the Moderate-resolution Imaging Spectroradiometer (MODIS) between 2002 and 2012. Frontal location is spatially correlated with FMD concentrations collected by the Sea Education Association. Higher concentrations of FMD are associated with frontal frequencies (FF) of 5–10 %. FMD is trapped between fronts and the coastline in accumulation zones. These results highlight the need to consider coastal FMD hotspots, given these are areas of high biodiversity value. • Three floating marine debris (FMD) accumulation zones in the Gulf of Maine (GoM) and coastal areas are identified. • FMD appear to be trapped between fronts and the coastline in the three accumulation zones. • Higher FMD concentrations (1–5 × 10³ pcs/km²) accumulate in high frontal frequency (FF) zones (5–10 %). • Lower FMD concentrations (<1000 pcs/km²) distribute in low FF zones (<5 %). [ABSTRACT FROM AUTHOR]