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.
Much of this radiation is absorbed by the Earth's surface and re-emitted as invisible heat rays. Just as a hot pavement radiates heat as it is warmed by the sun, the Earth's surface radiates heat back to the atmosphere. If incoming solar radiation is 100 units: 16 units are absorbed by dust, water and ozone;