Air Insolation

Air insolation

Solar radiation is the transfer of energy in the form of electromagnetic waves emitted by the sun . While insolation is part of the solar radiation that reaches the earth's surface .Factors that affect insolation :1 . Constant influence of the sunThe average magnitude of 1.94 cal/cm2/menit actual changes, primarily due to :a) The change in the intensity of solar radiation caused by changes in the number of sun spots , which range from 1 % -2 % .b ) Changes in the Earth - sun distance . This is because the elliptical orbit of the earth and the sun is at the fire . Farthest distance occurred on July 4 ( aphelium ) 151 900 000 km and the closest distance at January 3 ( perihelium ) 149 500 000 km . amount of solar energy received is inversely proportional to the square of the distance .
2 . Effect of the angle of incidence of sunlightDifferences in sun angle causes :a) Differences horizontal surface area that gets light . Beam that spans a narrow horizontal surface will receive more solar energy .b ) Difference length of sunlight through the atmosphere . The greater the angle of incidence beam , the shorter the atmosphere through which the beam . Thereby reducing the energy intensity of the sun .c ) So the greater the angle of incidence of sunlight , the greater the insolation received .
3 . Effect of long daylightAt each of these places during the day is not the same length , except in the equatorial region . During the summer soltisium longest time and shortest time soltisium winter . The amount of solar energy is proportional to the length of time of receipt . So the longer the daylight the greater insolasinya .
4 . the influence of the atmosphereAt undergo radiation as it passes through the atmosphere due to the reduction process of absorption , reflection and scattering . This process depends on :a ) The length of the atmosphere through which the beam , which is determined by the size of the angle of incidence beam .b ) Transparency of the atmosphere , determined by the level of water vapor and clouds .The influence of the earth's rotation and revolution of the Earth's rotation caused insolation changes in the angle of incidence beam with a daily period , thus causing changes in daily weather anyway . While the revolution of the earth causes seasonal weather changesDeployment insolation :1 . Spread of annual insolationAnnual insolation is greatest on the equator , the more to the less polar then insolation . If the atmospheric effects neglected in polar insolation received only 40 % of the received at the equator .2 . Deployment time equinoks insolation ( 21 March & 23 Sept )On insolation is spread at almost the same latitude with annual insolation . If neglected, the effect of the atmosphere in polar insolation equinoks 0 .Note: ly ( Langly ) , the unit of insolation . 1 Langly = 1 cal/cm23 . Deployment time soltisium insolation ( June 21 & 22 Dec)Either June 21 or 22 des , insolation is not the same between the northern and southern hemisphere . If the effect of the atmosphere on 21 June insolation ignored the south pole 0 , and further to the north 40oLS greater . And the north down to 62oLU , further north up and max at the poles.
5 . Annual insolation curve1 ) Type tropic ( LU o 23 ½ - 23 ½ o LS )2 ) Type of the middle latitudes ( 23 ° N ½ - 66 ½ o LS )3 ) Type of pole ( 66 ½ o LU LU - 90o ) and ( 66 ½ o LS - LS 90o )
6 . heat transfer1 ) RadiationHeat transfer in the form of electromagnetic waves .2 ) ConductionHeat transfer through a medium .3 ) ConvectionHeat transfer by the movement of heated bendayang .4 ) Evaporation and condensationSolar heat vaporizes water containing latent heat . If the latent heat of condensation is released and heats the atmosphere .