Fugacity of carbon dioxide (fCO2), temperature, salinity, and other variables collected from surface underway observations using shower head equilibrator, carbon dioxide gas detector and other instruments from NOAA Ship Oscar Dyson cruises DY1906_L2, DY1906_L3, DY1907_L1, DY1907_L2, DY1908, DY1909 (EXPOCODES 33OA20190626, 33OA20190720, 33OA20190813, 33OA20190830, 33OA20190919, 33OA20191007) in the Gulf of Alaska, Bering Sea, North Pacific Ocean from 2019-06-26 to 2019-10-12 (NCEI Accession 0208839)

This dataset contains surface underway measurements of fugacity of carbon dioxide (fCO2), sea surface salinity, sea surface temperature, and other parameters collected during NOAA Ship Oscar Dyson cruises DY1906_L2, DY1906_L3, DY1907_L1, DY1907_L2, DY1908, DY1909 (EXPOCODES 33OA20190626, 33OA20190720, 33OA20190813, 33OA20190830, 33OA20190919, 33OA20191007) in the Gulf of Alaska, Bristol Bay, North Pacific Ocean from 2019-06-26 to 2019-10-12. This effort was conducted in support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP).