Carbonate system data from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) across the South Pacific and Southern Oceans from December 2022 to January 2023

This dataset includes total alkalinity (TA), dissolved inorganic carbon (DIC), and pH on the total scale (pHt) at 25 degrees Celsius collected on the GEOTRACES GP17-OCE cruise onboard the R/V Revelle between December 1, 2022 and January 25, 2023. All three were collected from the ODF rosette, with pHt also being collected from the FISH. The pHt was measured at 25 degrees Celsius onboard, while the TA and DIC were collected into borosilicate glass bottles and returned to the laboratory for analysis. These data can be used in conjunction with trace element and isotope (TEI) data also collected on the cruise to better understand the role of TEIs on carbon cycling as well as decadal-scale changes and variability in South Pacific carbon chemistry when combined with prior (or future) occupations in the same region. Raw absorbance values and absorbance ratio for spectrophotometric pH measurements are also provided as a supplemental file.