Oceans not acidifying scientists hid 80 years of pH data
I don't know if the "hid" it but rather they just were not looking. If you notice the data points really start getting going starting just before 1960. . . That's when the International Geophysical Year was declared in 1957! Specifically, July 1, 1957 to December 31, 1958. . . even then the Green Scientists had to exaggerate and distort data. . . making their Geophysical Year 18 months long! That's when they started looking. . . everything before that was sporadic data from individual scientists in random places and depths. Nothing organized or systematic. Some data were taken on shipping routes, for example, or on scientific expeditions, but there was no effort to do a gridded pattern of area or depth of an entire ocean or sea, referencing sources of the chemicals that could raise or lower pH.
Looking at their historical graphs, it is pretty much guesswork whether ANY of it means anything or not.