No YOU'RE lying, Frank. In your other post you said "pH", now you're saying "acidity". You really shouldn't be posting in a science forum, if you don't know the difference. Personally, I think you do, hence the lying charge.
konradv- you are confused again. the commonly used scale for acids and bases is the pH scale. it is logarithmic not linear, that is why conflating a 30% rise in [H+] as a 30% rise in acidity is misleading at best. also because the oceans are basic, any move towards pH 7 is properly termed neutralization not acidification. the problem is that the 2 parts per million change in [H+] is not a 0.1 change in pH anywhere else but going from pH 8.2 to pH 8.1, so it is a rather meaningless statistic.
I know EXACTLY what I'm talking about. The part I bolded isn't misleading, if you understand the topic. What I was talking about was Frank conflating % acidity and pH. What's the problem with saying there's been a 30% increase in H+? It's true and easier to understand by the non-scientifically inclined. The "acidification/neutralization" comment is just playing with words. Those who deal with it daily would not be confused in the slightest.
OK, if you know exactly what you are talking about, why are acids measured in molality, normality and weight/volume? what is the term percent acidity associated with. why is acidity of a complex liquid measured in pH?