Day 7 and 8-GEOG
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This 2 page Class Notes was uploaded by Kathleen Tann on Friday September 18, 2015. The Class Notes belongs to GEOG 221 at Kansas State University taught by Julie L. Commerford in Fall 2015. Since its upload, it has received 39 views.
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Date Created: 09/18/15
DAY 7Lecture Notes Ch 3 Atmospheric Motion Air Pressure weight of air affected by temperature 0 Air density is greatest near Earth s surface 0 Air pressure in uenced by air temperature 0 Warm air lower pressure 0 Cool air higher pressure 0 Pressure decreases with altitude o Aheroid Barometermeasures air pressure How do we get differences in Pressure Unequal distribution of heat energy Direction of Air ow unequal heating of land surfaces 0 Variation is solar radiation received by latitude 0 Density differs in places 0 Surface air ows from high to low pressure Convectionvertical movement of air 0 Advectionhorizontal movement of air Low pressure system 0 Air heats rises and converges at surface cooler air rushes in to ll that void 0 Clouds storms form as air cools condenses o Cycloniccounterclockwise movement of air High pressure system 0 Cool Air sinking down to surface and diverges 0 Clear weather Direction of Air ow Pressure Gradient Force greater difference in pressure leads to steeper gradient and faster air ow Air ows from high to low pressure Wind movement of air distributes temperature Coriolis Force Due to Earth s rotation de ects objects like air and water traveling in atmosphere North Hemide ection to right South Hemide ect to left Frictional Force occurs at ground level Causes wind to slow down and move in irregular ways Global Scale Unequal heating drives air across atmosphere 0 On simpli ed Earth air has low pressure at equator warm air rises to poles creating advection Actual Earth latitudinal belts of high and low pressure Intertropical convergence zonewarming creates a zone of low pressure at equator wind converges to ITCZ by advection Hadley celltropical convection loop 0 Air at tropics is warmed year round by direct sun Subtropical High pressure system air rising from ITCZ o Midlatitude Circulation Ferrel Cell polar front 0 Polar Circulation circulating loopPolar Cell Polar high pressure system Monsoonal Winds Seasonal shift of ITCZ DAY 8Lectu re Notes Sea Breeze BY DAY 0 Breeze blows form high pressure sea to low pressure land Land Breeze By Night 0 Land is cooler off more quickly than water so reverse breeze blows from high pressure land to low pressure sea Oceanic Circulation 0 Surface currents driven by wind Gyres form as continents block movement of waterwhirlpools Thermohaline Circulation Oceanic Conveyer Bet slow vertical mix of water between ocean layers
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