Dissolved inorganic carbon, total alkalinity, pH on total scale and other variables collected from surface underway observations using a flow-through pump and other instruments during the cruise ship Celebrity Flora cruise (EXPOCODE: 28AQ20190515) on a cross-Atlantic transect from 2019-05-15 to 2019-06-14 (NCEI Accession 0204649)

This dataset contains dissolved inorganic carbon, total alkalinity and pH data measured from a surface underway system in a cross-Atlantic transect during May 2019. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry resulting in a reduction in pH, a process termed ocean acidification. In support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP), the Ships of Opportunity Program (SOOP) are utilized to collect water samples to measure surface water inorganic carbon and hydrographic parameters including nutrients. Samples were collected during the Celebrity Flora's inaugural transit from Europe to the Canary Islands and onwards to St. Martin with the final destination being the Galapagos Islands. Water samples are sent to and analyzed by scientists at the Atlantic Oceanographic and Meteorological Laboratory (AOML) for dissolved inorganic carbon, pH, total alkalinity. These data are used to monitor short-long term ocean acidification trends.