IPCC on acid – if they are virtually certain about ocean acidification, why does X-prize offer a reward for designing a proper ocean pH meter?

The IPCC writes in the “leaked” SPM It is very likely that oceanic uptake of anthropogenic CO2 results in acidification of the ocean. The pH 44 (see 7) of seawater has decreased by 0.1 since the beginning of the industrial era, corresponding to a 45 26% increase in hydrogen ion concentration. {3.8.2; Box 3.2; FAQ…