Southern Maine, New Hampshire, and Northern Massachusetts Continental Shelf Geophysical Database: 2022 Field Campaign – Grain Size Data, Station Summaries, and Seafloor Photographs

Presented in this data report are the geophysical data collected during a major field campaign in 2022, with the purpose of obtaining ground truth for the expansion and improvement of high-resolution surficial geology maps of the western Gulf of Maine (WGOM) and for the description of reference sites developed for future evaluations of acoustic systems (Ward et al., 2021a; 2021b). Data from the UNH Ocean Engineering 972 Hydrographic Field Course classes in 2021 and 2022 are also included. This expansion of the geophysical database is being used to verify seafloor classifications in previously mapped areas that lack sufficient data, and to expand into adjacent unmapped areas. In total, 164 stations were occupied, sediment collected and analyzed at 156 of those stations, and video recorded at 78 stations. All data was processed and added to CCOM’s existing geophysical database of the WGOM. The database has three main parts. Part 1 contains the entire sediment grain size database, including metadata, definitions, sediment grain size classifications, and grain size statistics. Part 2 contains individual station summaries, including location information, seafloor photographs, sample photographs, and grain size classification and statistics. Part 3 contains photographs of the seafloor.