Partial pressure (or fugacity) of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V Mirai cruise MR20-05C (EXPOCODE 49NZ20201003) in the North Pacific Ocean, Bering Sea, Chukchi Sea, Arctic Ocean from 2020-10-03 to 2020-10-25 (NCEI Accession 0292020)

This dataset includes surface underway, chemical, meteorological and physical data collected from R/V Mirai cruise MR20-05C (EXPOCODE 49NZ20201003) in the North Pacific Ocean, Bering Sea, Chukchi Sea, Arctic Ocean from 2020-10-03 to 2020-10-25. These data include water temperature, barometric pressure, partial pressure (or fugacity) of carbon dioxide - atmosphere, partial pressure (or fugacity) of carbon dioxide - water. The instruments used to collect these data include Carbon dioxide (CO2) gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement.