Discussion on solar radiation and its types with important. Terrestrial radiation, emitted by earths surface and atmosphere. Terrestrial radiation an overview sciencedirect topics. Solar radiation arriving at the earth from the sun provides the energy that. Solar radiation at the earths surface varies from the solar radiation incident on the earths atmosphere. The solar radiation or irradiance at the top of the earths atmosphere is called extraterrestrial radiation and the current accepted value for this solar constant now referred to as the total sky irradiance is 66 wm 2. Extraterrestrial radiation an overview sciencedirect.
Terrestrial radiation is a longer wavelength which is totally infrared. This chapter discusses the solar and terrestrial radiation. Solar and terrestrial radiation all objectives radiate energy, not merely at one single wavelength but over a wide range of different wavelengths. What is the difference between insolation and terrestrial. When the terrestrial solar radiation reaches the earths surface,it is broken into two components i. Chapter v solar and terrestrial radiation sciencedirect. The transmission of shortwave solar radiation by the atmosphere coupled with the selective of longerwave terrestrial radiation, especially by water vapor and carbon dioxide, resulting in warming of the atmosphere. Solar wind speed at soho ranged between 274 and 308 kmsec. Solar and terrestrial radiation 1st edition elsevier. Pdf to text batch convert multiple files software please purchase personal license.
With qiang fu, in atmospheric science second edition, 2006. Thus 65 units of solar radiation entering the atmosphere are reflected back into the space. Terrestrial radiation comes from the earth and its atmosphere. Heat budget is the balance between insolation incoming solar radiation and terrestrial radiation. An important engineering task is to design solar energy systems that are able to collect as much solar radiation as possible under these constraints. Solar and terrestrial radiation occupy different ranges of the electromagnetic spectrum that we have been referring to as shortwave and longwave. Hoa monthly average extra terrestrial solar radiation at horizontal surface s a monthly average daily sunshine hours s maxa maximum possible daily sunshine hours at a given location. The energy emitted by the sun is virtually invariant, estimated to be. It is the electromagnetic radiation which originates from earth and its atmosphere. Heat transfer by electromagnetic radiation can travel through empty space. Estimation of average solar radiation on horizontal and. The time it takes light from the sun to reach the earth is 8 minutes and 20 seconds. Journal of engineering studies and research volume 17 2011 no. After shading a light on the extraterrestrial solar radiation in the chapter 3 it is important to evaluate the global terrestrial solar radiation and its.
Insolation is radiation that comes from the sun in the form of electromagnetic waves. Cloud cover, air pollution, latitude of a location, and the time of the year can all cause variations in solar radiance at the earths surface. For reasons explained in the next section, water vapor, carbon dioxide, and other gases whose molecules have electric dipole moments absorb radiation more. This account of incoming and outgoing radiation always maintains the balance of heat on the surface of the earth. The greatest intensity of solar energy is radiated at a wavelength much shorter than that of the greatest energy emitted by the earth. Typical peak value is wm2 on a terrestrial surface facing the sun on a clear day around solar. Renne, in advances in solar heating and cooling, 2016.
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