This is a lengthy (30 minutes) presentation by Dr. Dwight Gledhill with the Cooperative Institute of Marine and Atmospheric Science. It is a good resource for background information about ocean acidification because it covers chemistry, carbon cycles, CO2 emmission, and focuses on the impacts of ocean acidification on coral reefs. Think of it as a half-hour class on the topic. There are other videos that are more concise, but this is a good one to watch to get scientific data and a more in-depth explanation about the different processes involved with ocean acidification. You can download the powerpoint as a separate document, which is helpful if you want to look at some of the graphs and diagrams more closely.