Questions raised on NSF Coral Reef Report

Patrick J. Michaels of Cato has raised some interesting questions in Okay Coral regarding a recent NSF study about the connection between increases in atmospheric carbon dioxide and the acidity of the oceans and the effect of this on coral reefs. I'm not very knowledgeable in this area, so I'd be interested in hearing any responses to the questions he raises, if any are forthcoming from NSF or elsewhere... so if readers know of any, please let me know.