Maybe I’m missing something but I don’t see anything about ocean acidification in those links, only temp/CO2 correlation, and the chart of ice core data only go

Maybe I’m missing something but I don’t see anything about ocean acidification in those links, only temp/CO2 correlation, and the chart of ice core data only goes up to 280ppm CO2. Since we’re at 420 now yet we have had temperatures this high before, maybe that historic relationship can’t be relied upon (as humans weren’t there the last time) and another explanation is required? See sibling comment re rate of change and time lag for species to adapt.