I attacked you?
Wow.. I happen to point out your argument is based on a non existent photo and that makes me the bad guy that can't "keep up."
You say you want a discussion about your "reasonable" alternative but when I point out some problems you think it is an attack? You don't want a discussion. You want to be agreed with or else you consider it an attack.
Some other problems with your argument. Ice forms on the top of water. As more ice forms it would release the majority of the heat from that change into the water below the ice. The graphic only measures temperature change at the very surface of the ice to the air. It would not measure any heat given off as water turns to ice.
One could easily point to a simple cycle of heat on the edge of the continent evaporates moisture which then cools as it changes back and become precipitation. This would account for a difference in temperature from the edge to the center of the continent. What it does not account for is the increase in temperature on the edge and the cooling in the center. If we assume that evaporation/precipitation are a zero sum game when it comes to heat then it becomes easy to see that an increase in temperature on the edge would decrease the temperature in the center. That however is too simplistic in its approach. This is not a closed system.
Nor does it explain the increase in temperature at the edges of the ocean.
We have some givens...
1. As water changes to ice it gives off heat.
2. The heat warms the surrounding areas, water or air.
3. As more ice forms more heat is given off.
But that leads to a real problem with your speculation. Ice formation is directly related to temperature. The colder the temperature the more ice that will form. the warmer the temperature, the less ice that will form. In a closed system ice formation will eventually lead to an equilibrium in which the temperature won't allow any more ice formation. That means there must be some outside force creating the increase in temperature. It can't be simply from the formation of ice.