Atmospheric gasses that absorb infrared radiation
Humans can disrupt the ecosystem by for an example drilling under the ground so you can find oil well that is bad because it increases having more earthquakes.
I will say distance from the sea, ocean currents, direction of prevailing winds
Incoming solar radiation is almost double at the equator then at the poles, causing the water closer to the equator to be warmer. The heat difference also causes the oceans to swirl so the water that is around the equator will eventually end up at the poles and keep circulating around.
