I don't know how much I buy the "the oceans are getting more acidic" line. The oceans are 3 orders of magnitude larger than the atmosphere, and CO2 makes up 380 parts per MILLION in atmosphere.

oceans: 1.384 × 10^21 kg http://hypertextbook.com/facts/1998/AvijeetDut.shtml

atmosphere: 5 x 10^18 kg http://en.wikipedia.org/wiki/Atmosphere_of_Earth