◇ The portion of incident radiation energy reflected back from | Upsc geography
◇ The portion of incident radiation energy reflected back from a surface is called albedo. Various attempts have been made to measure total albedo of the earth (including its atmosphere). Various data derived so far indicate the earth's average albedo fluctuating between 29 per cent and 34 per cent (including the energy reflected through the mechanism of diffuse reflection by dust particles, water molecules etc., (from the cloud surface and from the earth's surface).
