GY 101 WEEK 3 NOTES
GY 101 WEEK 3 NOTES GY 101-002
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This 3 page Class Notes was uploaded by Isett Notetaker on Friday September 9, 2016. The Class Notes belongs to GY 101-002 at University of Alabama - Tuscaloosa taught by Douglas Sherman in Fall 2016. Since its upload, it has received 8 views. For similar materials see Atmospheric Processes and Patterns in Geography at University of Alabama - Tuscaloosa.
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Date Created: 09/09/16
GY 101; Week 3 Atmospheric Composition and Energy • Homosphere <80 km (mesopause) • Heterosphere ◦ N2: 90200 km ◦ O : 2001100 km ◦ He : 1100 3500 km ◦ H: 3500 + km • Ionosphere ◦ 50 500 km • Ozonosphere ◦ absorbs ultraviolet (shortwave) radiation ◦ almost all UVB and UVC • Ionosphere ◦ absorbs very shortwave radiation ◦ DEF layers control radio wave propagation ◦ DE layers active during daytime ◦ F layer reflects/refracts Some Review Concepts • major constituents of air • layers of the atmosphere • aneroid barometer • Meteorology ( refers to what is going on in the atmosphere at a place and a time, measure weather) vs Climatology (statistically, deals with the weather, analyze climate) • Ideal Gas Law (the density of an ideal gas is proportional to its temperature, as the temperature decrease the density increase) • Hydrostatic Pressure Equation (dont memorize the equation but be familiar with what they mean) Heat and Some Laws • Sensible Heat: causes temp changes ◦ we can feel it with our hands and skin • Latent Heat: associated with state changes ◦ latent means hidden • Specific Heat: sensible heat required to change unit mass one unit temperature, large values indicate greater thermal stability • Wien’s Law as the temperature (T) goes up, the wavelength of max intensity radiation goes down. • StefanBoltzman Law: Rate at which energy is reradiated ◦ if you double the temperature the rate at which the temperature is reradiated goes up 16 fold ◦ relates the wavelength of emission to temperature ◦ rate of emission increases as T^4 Mode of Heat Transport • Radiation: most efficient through vacuum ◦ electromagnetic spectrum ◦ shortwave and longwave • Conduction: molecule to molecule • Convection: TemperatureInduced Buoyancy Warm rises, cold sinks • Advection: Movement of Heated (Cooled) Masses Ultraviolet Rays • Violet • Indigo • Blue • Green • Yellow • Orange • Red • Infrared Atmospheric Depletion • incoming shortwave • reflection ◦ albedo ◦ 26% • Absorption ◦ 25% • Scattering ◦ 20% • Increases poleward Radiation near Surface Reflected (albedo) • snow 7590% • clouds 5080% • ocean 370% • dry sand 3545% • soil 535% • vegetation 535% Absorbed • reradiated as Longwave Scattering • small practicals scatter small wave lengths • larger particales scatter larger wave length • rayleigh scattering gives the atmosphere its blue color • changes the color of the sky
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