Test 2 Geography 20502

Test 2 Geography 20502 - Test 2 Geography 2050 Geog 2-08-08...

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Test 2 Geography 2050 Geog 2-08-08 Solar Radiation is the primary heat source for the Atmosphere, it’s the primary fuel for it and our weather We must balance between… Insolation is incoming solar radiation Absorption of terrestrial radiation by atmospheric gases And how much of it goes into space from the earth All of which will describe the global energy budget There are regional and global differences in radiation and temperature and how they effect the atmosphere Atmospheric influences on Insolation Solar energy interacts with atmospheric gases and/or Earth’s surface, some makes it to the ground after it goes through all of this Some energy might get absorbed directly by a gas particle, some might hit and reflected, some might be scattered and some making it all the way to the ground Absorbed, reflected/scattered, or transmitted Only absorbed energy leads to direct heating, it’s the only way, everything else is indirect and secondary process Processes of the Solar Energy in the Atmosphere: Absorption which is particular gases/liquids/solids in atmosphere absorb the solar energy Some are better than others at doing this, the molecule absorbs it, heats up the molecule and so less of it gets down to the ground For weather, the more energy absorbed at this level, the less that gets down and drives the thunderstorms Heat increase in the absorber - less energy at surface 55 degrees F temperature average in the world Overall atmosphere gases are relatively poor absorbers, they are not very efficient, it meant most energy coming is not being absorbed and being thrown out another way And with most actually making its way to the ground surface
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Reflection/Scattering , is a way Energy is redirected in the atmosphere In this the energy is basically being bounced, and NO heat increase in the object Usually only a portion of energy is reflected, maybe a portion of it gets absorbed but a percentage is reflected Ice sheets of Greenland, tops of white clouds are great reflectors Albedo is percentage of reflected energy, like a white cloud has a 90 percent albedo, its how much reflected light there was If it gets warmer means more energy and more clouds which could count act the warming by reflecting more radiation away Energy can be reflected, in an equally intense beam it is Specular Reflection, like looking in a mirror seeing a perfect one to one reflection and is common Diffuse Reflection is when it goes into many weaker wavelengths or Scattering Most gases are very good at scattering so they make up the absorption factor Scattering with most gases are very good at doing this to radiation Most of what we get is the radiation having been bounced around like crazy so it is diffuse usually when it hits the surface Not all particles scatter equally, it depends on the size of the scattering agents Like a hail stone will be better at it than a small oxygen molecule 3 types of Scattering 1. Rayliegh is responsible for the sky being blue, involves gases smaller than
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Test 2 Geography 20502 - Test 2 Geography 2050 Geog 2-08-08...

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