Geography 2.2.16 Geog 1112
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This 2 page Class Notes was uploaded by Tizhana Turner on Thursday February 11, 2016. The Class Notes belongs to Geog 1112 at Georgia State University taught by Zaina Qureshi, Lashonda J. Williams in Fall 2015. Since its upload, it has received 19 views. For similar materials see Intro to weather and climate in Geography at Georgia State University.
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Date Created: 02/11/16
Geography 2.2.2016 What’s going on with the weather today? Any clouds? What do they look like wispy, lumpy, and sheety? Overcast w/ dense fog Temperature warm or cold? warm Is it humid? yes Any precipitation? Yes, earlier Is it windy? Not really. Today is Groundhog Day! From German “ Candlemas Day” First official groundhog day: Feb 2 , 1886 in Pennsylvania ( no shadow). Atlanta has a groundhog too. Recap: solar energy passing through the atmosphere Transmission Absorption Reflection Scattering Refraction Energy Balance: Greenhouse Effect Traps heat inside of it. Atmosphere absorbs longwave energy; reradiates some back to earth. (Carbon dioxide, water, methane, etc...) Atmosphere delays transfer of heat from earth into space. Energy Balance: Clouds Can lead to cooling or heating. Albedo reflects sunlight Traps longwave radiation Contrails: clouds that are lines across the sky. ( the clouds that jets make across the sky Diurnal range: the maximum and minimum temperature. Energy Balance: Latitudinal Differences Since we live on a curved planet the temps. Are going to be different in different locations. Energy Balance: Daily Radiation Patterns We get the warmest temperatures around 34pm. Our lowest temperature of the day is just before sunrise Energy Balance: Net Radiation at the Surface Net R = ( SW down + LW down) – ( SW up + LW up) SW down = downward shortwave radiation SW up = upward (reflected) shortwave radiation. LW down = downward longwave radiation. LW up = upward longwave radiation. Energy Balance: Global Net Radiation at the Surface Bigger Net Rad. Near Equator, over oceans Most of the world has positive net rad. How Areas with Positive Net Rad. Lose Heat Sensible heat flux: Energy (heat) transferred between air and surface Latent heat flux: heat transferred as water changes phase Ground heat flux: flow of energy into and out of the ground. Reasons for Urban Heat Island Cement/asphalt Tall buildings Pollution Industry Transportation Other sources of anthropogenic heating (ex heating/air conditioning) Lack of vegetation Ways to Mitigate UHI Urban forest ( more vegetation) Green roofs ( plants on the tops of roofs) Light colored pavements/roofs Reduce energy consumption
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