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Geography 2.2.16

by: Tizhana Turner

Geography 2.2.16 Geog 1112

Tizhana Turner

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About this Document

These notes go over last Tuesday lecture.
Intro to weather and climate
Zaina Qureshi, Lashonda J. Williams
Class Notes
25 ?




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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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