The idea that the oceans warm when the atmosphere gets colder makes sense. Something has to extract the the heat from the air. Just like A/C, there are two halves to the cycle, hot side/cold side. If the oceans are pulling heat from the air to cool it they are going to indeed heat up at the same time because of it. Might be sound physics here.
All true, but the real problem is that 'science' and the 'media' are trying to find ONE factor to blame for 'climate change'.
There are many factors that influence weather, and therefore 'the climate'. One of the largest factors in the whole equation is 'clouds'. Still, it is a combination of many factors and trying to 'model' and predict what will happen is impossible.
The heat transfer between the oceans and the atmosphere also plays a part, but again it not the sole factor so predicting what it will do is impossible.