Albedo is the fraction of solar radiation that is reflected by a surface. Surfaces with high albedo reflect more sunlight and absorb less heat, while surfaces with low albedo absorb more sunlight and reflect less.

* Sea ice: Sea ice is very reflective, with an albedo of around 0.6 to 0.8. This means that it reflects 60% to 80% of the incoming solar radiation.

* Soil: Soil has a much lower albedo, typically ranging from 0.1 to 0.4. This means it reflects only 10% to 40% of the incoming solar radiation.

Therefore, sea ice reflects significantly more sunlight than soil, making it a key factor in regulating Earth's climate. The high albedo of sea ice contributes to the polar regions' cold temperatures.