Why are glaciers blue?
Because the red (long wavelengths) part of white light is absorbed by ice and the blue (short wavelengths) light is transmitted and scattered. The longer the path light travels in ice, the more blue it appears. 2.1 So… why is snow white? Light does not penetrate into snow very far before being scattered back to the viewer. However, the next time you are in an igloo, notice that it is blue inside. You can also poke a stick into some snow, shade the area around the hole, and look deep into the snowpack. The light that has traveled some distance through the snow will be enhanced in blue. 3. Is glacier ice colder than regular ice? No – indeed, all of the physical, thermal and electrical properties of “regular icebox ice” and glacier ice are identical: density, viscosity, heat of fusion, latent heat, heat capacity, dielectric constant, thermal conductivity, absorption, emissivity, etc. The few small differences in characteristics are solely due to grain size differences (see 3.1). NOTE: H
