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Midterm

Part I: The energy-atmosphere system This includes section 1_2 to 1_5. I have typed out everything that Quinton has said and even added a little extra for explanation. If something is highlighted, than that means it has a higher chance of being on a a qui

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Department
Geography
Course
GG101
Professor
William Bill Quinton
Semester
Winter

Description
Part I The energyatmosphere systemPart I2 What controls strength of sun waves Distance of the sun earths revolution around sun and its tilt atmosphere filtering effectSolar Constant 2Solar constant of 1400 wm once sun rays get to earthEquinox position Everywhere has 12 hours of day and 12 hours of nightWhen sun sees both poles at same timeSub solar point at equatorHappens twice in a year Fall and springEqual amount of light hitting north and south Northsouth Winter solsticeSub solar point is the condition of the earth where sun is directly over head 90 degrees over on horizonAxis line is 235 north of light24 hour darkness in NorthSub solar point 235 south of equatorSummer SolsticeSub solar point Is 235 north of equator24 hour darkness in SouthGeometric positions are important because they control position of sub solar point and therefore angle of indication Angle of incidence is important because energy from sun is diluted in low angle positions and less diluted in high angle positionsTilt of the axis causes seasons Seasons are effective way of distributing energy If no tilt than we would have hotter equator and colder poles Sun degree is 26 during Winter 50 during Spring fall and 73 during Summer solsticeTime of dayyear Check slides for graphWhat Controls Angle of Incidence Latitude time of day time of yearSolar Energy to Earth and the Seasons How does solar radiation flow through Earths atmosphere 1 Nature and forms of radiation Wavelength is a measure of solar radiationLong wave and short wave 2 Laws governing energy flows Energy is in equilibrium Moves from surplus to deficit Rate of energy movement is proportional to energy gradient Energy moves through colder things faster Energy cannot be created or destroyed conservation of energy I ta 3 Laws Describing Radiation from surfacesThe Electromagnetic Spectrum Long waves are in lower half Short waves are top half Both can be broken down into components Short wave is the light that we can see 1 Inverse relationship between temperature of an object and wavelength it emits Weins Law DeltamaxbT b is constant and T is surface temperature b2898 Ttemp K kelvin Explains horizontal difference in graph 2 Flow of radiant energy from a surface is directly related to the surface energy to the fourth power Increase temperature of the surface a little bit you increase the temperature of radiation by a lot The wavelength of maximum intensity radiation grows longer as the absolute temperature of the radiating body decreases 4StefanBoltzman law MTExplains vertical difference in graph 4 Budgets of radiation and energy Earths atmosphere transmits absorbs and reflects the suns energy taAtmosphere is an energy filter 2With filter 1400 wm square radiation but around 500 is transmitted If no filter than all is transmittedFilter causes radiation to be transmitted absorbed or reflected The ground does the same thing Depends on ground properties Ex Snow has better reflective properties than asphaltAtmosphere also varies About 10000km deep 97 within ground and 30km above78 nitrogen21 oxygen
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