What is earthly radiation?

Earth's radiation is the amount of heat or light energy that the Earth emits back to space, mostly as a percentage of the total radiation that it receives from the Sun. This is also referred to as Albedo, which is expressed as an ratio or percentage of light energy of any star body, including planets, asteroids or spacecraft, reflects their surface compared to what is accepted. Another term for the radiation of the Earth is the leaving long -wave radiation (OLR), which generally refers to the fact that what the Earth radiates into space is mostly infrared waves invisible to human view, which are the form of thermal energy or radiation of the black body.

Earth's earthly radiation as a pure energy loss from the surface will actually prove to be relatively minimal due to atmospheric damping effects. The average amount of sunlight energy that the Earth receives above the atmosphere boundary is estimated at1 370 watts per square meter. Since 2010, there has been maximum radiation back into space in equatorial desert areas with values ​​of about 350 watts per square meter and dropped to less than 150 watts per meter quadrate when one approached the polar caps. The actual amount of radiation that escapes into space from any place depends on short -term conditions in the atmosphere that has a variable effect on blocking and absorption of light long wavelength. With increasing greenhouse gases from global industrial activities, this effect also increases on heat capture, which generally reduces the general level of Earth's radiation.

National Aviation and Universe (NASA) in the United States calculated numbers for different aspects of radiation balance on Earth. The sunlight received at the atmospheric level is immediately reflected in space and another 20% reflects from the cloud. Another 19% radiation will never reach the surface because 16% is absorbed by the atmosphere and 3% clouds. The lights to reachThe surface of the Earth, with 4% of which immediately reflects back into space. The rest of the light that reaches the surface of soil and oceans - 51% - is about what earthly radiation is actually composed.

of a slightly more than half of the solar energy that has an impact on the earth's surface, about 70% eventually escapes back into space, while the rest is absorbed by the atmosphere and water vapor. This means that approximately one third of the radiation that affects the surface of the Earth from the Sun is eventually lost back into space, as well as one third of the light that never reaches the surface and reflects with the atmosphere itself. While the energy transmission process is continuous, the Earth also radiates more into space at night than during the day, because the temperature of the Earth's surface has a direct impact on how much the heat loss of Takes and the planet is subject to the gradual cooling effect at night.

, however, different surfaces on Earth have different levels of albeda or ratios for how much light energy they absorb and reflect. Albedo 0 would be equal to overall absorptionEnergy and value of 1 would be a total reflection, both of which in fact never occur. Surfaces such as concrete have a reflective quality of 55%, grass 25%and typical soil 17%. Earth areas that have very high Albedo for almost the overall effects of Earth radiation include areas covered with fresh snow, where it is anywhere from 80%to 90%, and areas with very low Albedo and almost overall light energy absorption include coniferous forests at the height of the vegetation period, reflecting quality 8%.