Greenhouseeffect

Project-BasedGlobalClimateChangeEducationCurriculumDevelopmentWorkshop

ClarksonUniversity

Globalradiation

Source:Trenberth etal.(2009).http://www.cgd.ucar.edu/cas/Trenberth/trenberth.papers/10.1175_2008BAM2634.1.pdf

Earth-SunInteraction

http://earthobservatory.nasa.gov/Features/EnergyBalance/

Solarradiation• Thesunemitsenergyintheformofelectromagneticradiation– Theemissioncharacteristicsofsun’sradiationcanbeunderstoodbyconsideringitasablack-body

– Ablackbodyisanidealizedbodywhichisaperfectabsorberofallelectromagneticradiation

• Theenergyisspreadoverarangeofwavelengths• Thewavelengthcorrespondingtothepeakenergyisdependentonthetemperatureoftheblackbody

Wavelengths

Black-bodyradiation• Blackbodyradiation– Thermalradiationofablackbody– EarthandSuncanbeconsideredasblackbodies• i.e.,perfectabsorbersofradiation• Emissionspectrumisdependentonthetemperatureofthebody

Source:PhET,UniversityofColorado.http://phet.colorado.edu/en/simulation/blackbody-spectrumNote:Flashrequiredtorunthisprogram(http://get.adobe.com/flashplayer/ )

Emissionprofiles

Sun(5777K)

Earth(300K)

Incomingsolarradiation

Source:http://earthobservatory.nasa.gov/Features/EnergyBalance/

Solarradiationbalanceatthesurface

Source:http://earthobservatory.nasa.gov/Features/EnergyBalance/

Greenhousegases• Greenhouseeffect– Long-waveradiationabsorbedbymoleculesintheatmosphere• Resultinincreaseintemperatureoftheatmosphere• Radiateenergybacktoearth

– Visualizationofthegreenhouseeffect• CO2 interactionwithradiation

– Source:King'sCentreforVisualizationinScience,The King'sUniversityCollege,Edmonton,Alberta,Canada,http://www.kcvs.ca/site/projects/climate.html

• Thedifferentgreenhousesgases– Source:http://www.kcvs.ca/site/projects/climate.html

• Earth’stemperatureasafunctionofatmosphericgreenhousegasconcentration– Source:PhET,UniversityofColorado;http://phet.colorado.edu/)

Solarradiationspectrum

Source:Wikipedia

AtmosphereEnergyBudget

Source:http://earthobservatory.nasa.gov/Features/EnergyBalance/

Globalradiation

Source:Trenberth etal.(2009).http://www.cgd.ucar.edu/cas/Trenberth/trenberth.papers/10.1175_2008BAM2634.1.pdf

Radiationbudget

Source:http://asd-www.larc.nasa.gov/SCOOL/energy_budget.html

Radiationspectra

Source:Wikipedia

Applets• InstallJava

– TocheckifJavaisalreadyinstalledinyourcomputer,goto,http://www.java.com/en/download/installed.jsp

– Ifnot,downloadtheprogram(http://www.java.com/en/)• AdobeFlash

– TestyourAdobeFlashinstallation(http://www.adobe.com/software/flash/about/)– InstallAdobeflash(http://get.adobe.com/flashplayer/)

• Appletssource:– Radiation

• http://itg1.meteor.wisc.edu/wxwise/radiation/tez.html– CO2-radiationinteractionandIRspectra

• http://www.kcvs.ca/site/projects/climate.html– GreenhousegasandEarth’stemperature

• http://phet.colorado.edu/en/simulation/greenhouse– CarbonCycle

• http://es.carboncycle.aos.wisc.edu/carbon-budget-tool/

• OtherReferences:– IPCCreport,2007– HardyJ.T.,Climatechange:Causes,Effects,andSolutions,WileyPublications,2006– www.earthobservatory.nasa.gov– Wikipedia