Everything on the planet is "radiating more than it recieves".. It's ALL a net loss to the sky. The point is, although we've shown some deeper ocean warming (accurate only in the past 40 years or so) --- MOST of that ocean skin heat goes into convection not radiation.. That's why most weather STARTS over the oceans.
And when "climate scientists" make the assertion that "the oceans ate the warming" for the past decade or so -- they do so with no agreed mechanism for that to actually happen IF it was due to increased IR back radiation.
Not to mention that oceans show they have been "eating" warming at relatively the SAME RATE for the past 50 years and don't SHOW any accelerated "appetite"..
As far this OP --- if it was ALL MANMADE and it followed the silly expectation that Temperature is a simple linear consequence of CO2 -- There wouldn't be so many changes in the RATES of warming that the models mostly miss..
No, it's you who don't understand. To warm the oceans the energy MUST penetrate deeply into the oceans. Mere surface warming does nothing, and not even being able to penetrate the skin of the water means there is NO energy transfer to the oceans. Heat rises, remember that from 5th grade science? If the heat rises away from the less than one millimeter of the water how then does it warm it?
It's time you took that 5th grade science class again.
Yes, you are looking at it from 5th grade science, but I am looking at it from grad school thermodynamics. I agree that back radiation cannot directly “warm” the ocean. That much is obvious. And it's obvious that back radiation cannot penetrate into the ocean. And it is obvious heat rises.
The point you fail to understand is that no real scientist should ever claim that the back radiation
directly warms the ocean. The mechanism for warming the deep ocean is complex and not fully understood.
You are making a mountain out of a molehill. Again, this is the point I was making: The ocean is radiating about 400W/m^2 at the top surface. Back radiation is cutting down the amount of radiation loss only at that top surface. That prevents the ocean from loosing massive amounts of heat by radiation alone at the top surface. That allows the predominant loss to be rising heat and evaporation.
The major concepts you should come away with is that back radiation is what keeps the ocean (and yes, of course, the rest of the planet) from loosing as much heat as it would without greenhouse gases. And you should stop the silly talk about anyone thinking back radiation can
directly warm the
deep ocean.
See Cricks's post #20 for in-depth details. You can understand it if you read it carefully. The one thing I object to in Crick's post is the wording that GHG's will "heat" the ocean. It is far more accurate to say that GHG's prevent the ocean from loosing heat.