Declining arctic sea ice is a component of enhanced climate change, impacting the lives of people. As the arctic sea ice melts it will form several positive feedback loops such as decreasing albedo, thawing permafrost, and increasing ocean levels. This contributes to an overall increase in global average temperatures, creating countless changes to our planet.
Albedo is the amount of solar energy reflected from the Earth back into space. Earth has an albedo rate of 30%. Higher albedo is equivalent to an increase in reflectivity that raises temperature in the atmosphere. Low albedo cools the atmosphere giving a positive feedback.
The melting of arctic ice reduces salinity of the adjacent oceans and this “causes a cessation of deep convection and a climate state with decreased oceanic heat transport, decreased high-latitude atmospheric temperature, and larger sea ice extent”
Sea ice cover in the Earth’s arctic regions is threatened by human induced climate change