More the catalyst for accelerated warming in Arctic and bordering countries,.
The Arctic's rapid warming—exceeding the global average by far—is a phenomenon known as Arctic amplification. This is driven by several interconnected processes:
Albedo feedback: As the climate warms and snow and ice melt, they reveal darker surfaces underneath, such as ocean water or bare ground, which absorb more solar energy. This accelerates the warming and leads to further melting—a classic feedback loop.
Convection differences: In the tropics, strong convection (warm air rising and mixing into the atmosphere) distributes heat vertically. But the Arctic experiences very little convection due to the weaker heat from the Sun, so the heat remains trapped near the surface.
Lapse rate feedback: In cold regions like the Arctic, the air near the ground warms much faster than the air higher in the atmosphere, trapping heat near the surface, and further accelerating the warming.
Water vapour transport: Atmospheric circulation patterns move warm, moist air from the tropics towards the poles. Since a warmer atmosphere can hold more moisture, the amount of water vapour transported to the poles is expected to increase with climate change, further intensifying Arctic warming.
Originally Posted by: bledur