Hydrographic, optical, and meteorological parameters measured by R/V Sikuliaq's underway systems during the Northern Gulf of Alaska LTER cruises, 2018-2022

This data set is a compilation of several data streams measured by R/V Sikuliaq's underway systems during cruises for the Northern Gulf of Alaska Long Term Ecological Research (NGA LTER) project. These systems were running for the duration of the NGA LTER cruises. R/V Sikuliaq's underway instrumentation includes a Sea-Bird SBE 45 MicroTSG, a Sea-Bird SBE 38 Temperature sensor, an In-Situ Ultraviolet Spectrophotometer (ISUS), and a Turner Designs C6 Multi-Sensor Platform - all sampling surface seawater from the forward seachest. Meteorological instrumentation includes a WindObserver 70/75 Ultrasonic Anemometer (corrected for ship motion), Vaisala PTU307 Pressure, Humidity, and Temperature Transmitter, Remote Measurements & Research PSP (Precision Spectral Pyranometer), PIR (Precision Infrared Radiometer), and a Biospherical Instruments reference PAR sensor. For this dataset, data from these instruments were combined with navigational and ship orientation measurements from the Kongsberg Seapath 320+ positioning sensor, averaged into 1 minute ensembles, and inspected for major quality issues. Oceanographic and meteorological data were separated into distinct CSV files for each cruise, for 4 files total. A raw version of this data is archived in the Rolling Deck to Repository (R2R), where it is associated with the cruise on which it was colleceted.. The cuises in this compilation include: SKQ201810S - Apr 18, 2018 to May 05, 2018 SKQ201915S - Jun 29, 2019 to Jul 18, 2019 SKQ202006S - May 04, 2020 to May 11, 2020 SKQ202010S - Jul 02, 2020 to Jul 16, 2020 SKQ202012S - Sep 01, 2020 to Sep 09, 2020 SKQ202106S - Apr 23, 2021 to May 06, 2021 SKQ202110S - Jun 28, 2021 to Jul 12, 2021 SKQ202210S - July 7, 2022 to July 24, 2022 These data are part of the Northern Gulf of Alaska Long Term Ecological Research (NGA LTER) program. The LTER program is a National Science Foundation–funded network of 28 sites nationwide that focus on the influence of long-term and large-scale phenomenon on ecosystems. Additional funding for sampling is provided by the North Pacific Research Board (NPRB), the Alaska Ocean Observing System (AOOS), and the Exxon Valdez Oil Spill Trustee Council (EVOS) via the Gulf Watch Alaska program.