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ISCI 1001 (36)
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Department
Interdisciplinary Science
Course
ISCI 1001
Professor
John Buschek
Semester
Fall

Description
ISCI 1001 A  Nov 26 2013 Climate Change ­Earth’s energy balance ­Incoming solar energy (340 w/m2) ­23% absorbed by the atmosphere ­29% reflected by the atmosphere ­48% absorbed at surface ­Surface energy budget ­48% coming in ­25% going out (evaporation) ­5% going out (convection) ­17% going out (??) ­Atmosphere energy budget ­23% absorbed ­59% going out (thermal radiation from atmosphere) ­12% going out (thermal radiation from surface) ­Atmospheric factors that affect climate ­Gases ­> global warming potentials ­CO2 ­CH4 methane All increasing in  ­N2O (nitrous oxide) concentration ­HFC­23 (halocarbons) ­Feedbacks (+) (­) (+) ­Temp inc ­> water evap ­> GHG ­> gaseous H2O inc ­> temp inc ­Positive change in temp = positive change in temp (­) ­Temp inc ­> water evap ­> gaseous H2O inc – clouds form ­> temp dec ­Positive change in temp = negative change in temp ­Aerosols ­Can also produce pos. or neg. effects ­Tiny droplets float in the atmosphere  ­Soot particles (black)­> trap energy ­> temp inc ­Other particles (lighter) ­> reflect energy ­> temp dec ­Radiation forcing ­Positive forcing incre
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