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?