I believe that the total global warming that is taking place in our surface air temperature and oceans must be from more than one source based on the amount of energy (heat) it would take to increase the temperature of each of these parts of earth. The amount of energy needed to change the surface air temperature is virtually insignificant compared to the energy needed to change our ocean’s temperature which is well diagramed here Energy content, the heat is on: atmosphere -vs- ocean | Watts Up With That?, although unlike this guy, I do believe the oceans are heating up.
I also believe that greenhouse gases produce radiative forcing that is increasing the surface air temperature of the planet, but I can’t make the leap to equate radiative forcing to the heating up of the oceans too. These guys do The Radiative Forcing of the CO2 Humans Have Put in the Air Equals 1 Million Hiroshima Bombs a Day | ThinkProgress. Gary Novak and I believe that the earth’s core is the source for the ocean temperature increase, EARTH Sciences - by Gary Novak, but Gary goes a step further and thinks the earth’s core is the sole cause of global warming. I was in agreement with Gary until I came across a NASA study that led me to the two source thought process, NASA - NASA Study Goes to Earth's Core for Climate Insights. This in my opinion does not let man off the hook because I believe that man contributes to the increase in temperature of the earth’s core. Over the past hundred years or so, man has moved or molested a lot of earth. Drilling, mining, and excavation in other forms may have reduced the pressure (very slightly) of the earth on its core allowing the temperature to increase to the point where it would be measurably significant in our oceans, having a dramatic effect on our environment. What do you guys think?