3,2,1 . . .blast off!
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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 PresentationTRANSCRIPT
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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.
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The Greenhouse effect
• Solar radiation in with shorter wavelengths• Converted to infrared energy at surface with
longer wavelength• Infrared energy trapped by greenhouse gases
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Greenhouse gases
• CO2
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Methane CH4 (25x more heat trapping ability than CO2!)
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N2O Nitrous Oxide
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Water!
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CFC’s (chlorofluorocarbons)
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And O3
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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
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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?)
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Why are these biomes in these places? What shapes climate?
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Earth’s axis – 23o tilt = seasonality
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Ocean currents also affect biome distribution.
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Rome is same latitude as New York!
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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
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La Nina
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El Nino Southern Oscillation vs. La Nina
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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?