3,2,1 . . .Blast off!
• Please get out paper and
read the board!
• *** Corrected link to second
carbon footprint now on the
HUB!
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 potential
Gas
2010
Concentration
Global 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?
Latitude – distance from equator
Convection cells
• Movement of air in
these cells explains
location of rainforests,
deserts
• **Hadley cell
• Ferrel cell
• Polar cell
Earth’s axis – 23o tilt = seasonality
Ocean currents also affect biome
distribution.
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?