This week, my new and hot is an article from BBC News, and it's about the polar ocean CO² sink. I actually heard a grad student in one of my anthsci classes talking about this last week, but didn't think much of it until I was browsing news articles today.
The loss of efficiency of the carbon dioxide sinks was expected, but not for another 40 years or so. This is a serious problem because as the surface water becomes super-saturated with CO², it becomes more acidic, harming many ocean organisms, such as coral. You can find the full-text here.