The Stats NZ ocean acidification indicator hasn’t been updated since 2020. To fill this gap, I requested the latest Munida Transect pH data from NIWA under the Official Information Act for a project. I’m publishing it here in CSV format, in case others want access.
Note: The downward trend in the graph shows increasing acidification. The Munida time series transect, in the subantarctic surface waters off Otago, is the Southern Hemisphere’s longest-running record of pH measurements.