Which climate feedback mechanism is most directly related to the melting of Arctic sea ice?

The climate feedback mechanism most directly related to the melting of Arctic sea ice is the ice-albedo feedback. Albedo is a measure of how much sunlight (solar radiation) a surface reflects back into space. Surfaces with high albedo, like ice and snow, reflect a large portion of incoming sunlight, while surfaces with low albedo, like dark ocean water, absorb a large portion of incoming sunlight. Arctic sea ice has a high albedo, reflecting a significant amount of solar radiation back into space, which helps to keep the Arctic region cool. When Arctic sea ice melts due to rising temperatures (global warming), it exposes the darker ocean water underneath. This ocean water has a much lower albedo than the ice, so it absorbs more solar radiation. The absorbed solar radiation warms the ocean water, further accelerating the melting of the remaining sea ice. This creates a positive feedback loop: warming causes ice to melt, which decreases albedo, which leads to more absorption of solar radiation, which causes further warming and melting. This feedback loop amplifies the initial warming and contributes to a faster rate of sea ice loss. The ice-albedo feedback is a critical factor in the accelerated warming observed in the Arctic region and the rapid decline in Arctic sea ice extent.