The research vessel (R/V) Kronprins Haakon is an ice-going vessel owned by the Norwegian Polar Institute, Norway. The surface water and atmospheric pCO2 measurements started in 2018, when the ship made its first research cruise to the ice-covered Barents Sea and Nansen Basin. Dr. Agneta Fransson at the Norwegian Polar Institute is PI for the NO-SOOP-Kronprins Haakon which primarily operates in Arctic Ocean waters and around Svalbard, and sometimes in the Southern Ocean.