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.
Only a small portion of the energy radiated by the sun into space strikes the Earth, one part in two billion. Yet this amount of energy is enormous. The sun provides more energy in an hour than the United States can use in a year! About 30 percent of the radiant energy that reaches the Earth is reflected back into space. About half of the radiant energy is absorbed by land and oceans.