| Summary: | This data set consists of underway data collected by a towed, underwater vehicle during cruises in the Gulf of Alaska. The vehicle is an Acrobat, a winged instrument platform that cycles between the surface and 60 m as it is towed behind a ship traveling at speeds of 5–8 knots. It is equipped with a SeaBird 49 FastCAT CTD (temperature, conductivity, and pressure) and a Wetlabs EcoPUCK optical sensor (chlorophyll a, colored dissolved organic matter (CDOM), and backscatter). These data are combined with position information from the shipboard GPS system (logged at 1 HZ intervals) to create a 3D data set of oceanic conditions. These data were collected during 6 cruises for the Northern Gulf of Alaska Long Term Ecological Research (NGA LTER) project. SKQ201810S, SKQ201915S, SKQ202010S, and SKQ202012S were collected during seasonal cruises aboard R/V Sikuliaq. NUQ201901S and NUQ202003S were collected during a special process cruise aboard R/V Nanuq focusing on the Copper River plume. After each cruise, data were assembled and corrected in MATLAB; the final data files were translated into netCDF and from that format, converted to CSV files. netCDF and CSV formats are provided in this dataset. This material is based upon work supported a consortium that comprises the Alaska Ocean Observing System (AOOS), the Exxon Valdez Oil Spill Trustee Council via its long-term monitoring program GulfWatchAlaska, the North Pacific Research Board through its Seward Line Long-term Monitoring program, and by the National Science Foundation through the Northern Gulf of Alaska Long-Term Ecological Research program (OCE-1656070). Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the funding agencies.
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