Well, you're right about conductive heat. I agree.
But you can't say that it's not the sunlight is the major factor which creates the conductivness. Right?
If there no sun, only thermal energy from inside of the earth can create heat, but here where i am, there are no such things. No mountains, no water streams like Gulfstream. So, here where i am the only source of heat is sun. Which leads to one thing: that even if it is not the radiant heat we feel by our sking, but still Sun is the major factor for creation such condition.
So, nor you or me can use the argument to reveal the true nature of the question. So, tied. But question about Polar Nights still up.
Even here in Belarus, i can see the sunset in the north-west and then the edge of the sun light slowly goes to North as the night proceeds and then Sun rises at the north-east. Does it happen in the Southern Hemisphere?