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Please get out your Obj #1&2 for a stamp Please pass back the updated unit calendar and read the board. 3,2,1 . . .Blast off!. The Greenhouse effect. Solar radiation in with shorter wavelengths Converted to infrared energy at surface with longer wavelength - PowerPoint PPT Presentation
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3,2,1 . . .Blast off!
• Please get out your Obj #1&2 for a stamp
• Please pass back the updated unit calendar and read the board.
The Greenhouse effect
• Solar radiation in with shorter wavelengths• Converted to infrared energy at surface with
longer wavelength• Infrared energy trapped by greenhouse gases
Greenhouse gases
• CO2
Methane CH4 (25x more heat trapping ability than CO2!)
N2O Nitrous Oxide
Water!
CFC’s (chlorofluorocarbons)
And O3
Greenhouse Warming potentialGas 2010
ConcentrationGlobal warming potential (over 100 years)
Residence time in atmosphere
Water vapor Variable with temperature
<1 9 days
CO2 390 ppm 1 Highly variable
CH4 1.8 ppm 25 12 years
N2O 0.3 ppm 300 114 years
CFCs 0.9 ppm 1,6000 to 13,000 55 to >500 years
Atmosphere diagram – the last story!
• Sources on this sheet just like the others• Show primary pollutants coming from each
source correctly (greenhouse gases)• Draw in greenhouse effect in green (get
it?)
Why are these biomes in these places? What shapes climate?
Earth’s axis – 23o tilt = seasonality
Ocean currents also affect biome distribution.
Rome is same latitude as New York!
El Nino• Normal conditions: winds blow west, cold waters rise• El Nino: winds stop blowing, warm waters in Eastern
Pacific block cold waters• Effects: disrupt marine ecosystems, major weather
changes over 2/3 Earth
La Nina
El Nino Southern Oscillation vs. La Nina
Check for understanding
• Name the 6 green house gases.• What human activities create CH4?• Is the greenhouse effect beneficial or
negative?• What energy type reaches the earth from
the sun?