Marine Pollution Bulletin 194 (2023) 115396 9 Fig. 4. Spatial distribution of In mass fractions in North Sea sediments in and around OWF area N-4 in A) 2016, B) 2018, C) 2019, D) 2020, E) 2021 and F) 2022. The investigated area is labeled according to the official designation of the site development plan for the German North Sea and Baltic Sea by the BSH (2023). A. Ebeling et al.