Willow Spring, NC City Data - Population, Homes, Statistics. Willow Spring, NC is a city with great restaurants, attractions, history and people. There are around 8,926 people who live in Willow Spring and approximately 627,846 who live in Wake County.
Snow, ice, and clouds have high albedos (typically from 0.7 to 0.9) and reflect more energy than they absorb. Earthâs average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASAâs Terra satellite is now collecting detailed measurements of how much sunlight the earthâs surface reflects back up into the atmosphere.
The Earth as a system is driven by the Sun's energy; and as the Sun's rays hit the Earth, a certain percentage of the energy is reflected back into space. The amount of radiation reflected by a surface is referred to as its albedo. Albedo can range from a value of 0 (no reflection) to a value of 1 (100% reflection). It is important to know how much of the Sun's energy at the poles is reflected, absorbed, or radiated back to into space.