hundreds gather to protest… global warming!. mr. jocz’s
TRANSCRIPT
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Hundreds Gather to Protest…Global Warming!
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Mr. Jocz’s
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–International Panel on Climate Change (UN): Human pollutants causing global climate change
Nobel Prize, 2007
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How Warming Occurs
• Sun waves hit Earth surface
either reflect/absorbed.• Incoming UV, outgoing Infrared• GGases trap reflected IR light
waves warming
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GW: Natural process warmer Earth
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Greenhouse Gases • All trap solar radiation in atmosphere
• CO2
• Water Vapor • CH4
• CFC’s • N2O (nitrous oxide)
• SOx• Trop. O3
Sig
nif
ican
t S
even
!!
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Water Vapor
• MAJOR greenhouse gas (85-97% of natural warming)
• Humans don’t affect its concentrations
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Cloud Cover
• Cover 60% of Earth; reflect 30% of light
• White Ice High Albedo (high reflectivity)
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Increase in CO2
• Cycling due to seasons
• Peaks CO2: fall spring: RESP!
• Troughs CO2: spring fall: PS!
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0.5° C increase over 100 yrs
Pre I: 280 ppmPost I: 360 ppm
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Methane CH4 Emissions
• Traps 25 x’s more heat than CO2
• Emissions: Anaerobic breakdown of org. material by bacteria in swamps, rice paddies, landfills, intestinal tracts,
• Also, nat. gas leaks
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Methane Reduction?
• Scientists are trying to invent new feeds for cows to reduce the amount of greenhouse gases they produce.
• http://news.bbc.co.uk/player/nol/newsid_6280000/newsid_6289500/6289542.stm?bw=nb&mp=wm&news=1&ms3=6&ms_javascript=true&bbcws=2
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CF
Cs
• Can absorb 1500-7000 times more radiation than 1 mol. of CO2
• Very stable (65-135 yrs)• Phased out by Montreal Protocol
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Nitrogen Oxides
• Emissions:Burning of gas, fertilizer app, feces.
• Lifespan: 120 yrs • Traps 230 times as
much as CO2
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Sulfur Oxides
• Emissions: Volcanoes, Coal burning, Smelting
• 15 x’s stronger than CO2
Mt. Pinatubo
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Kyoto Protocol
• Int. env. treaty 12/11/97,
Effective in 2005
• Industrialized countries met in Japan to agree
to reduce greenhouse gas
emissions.
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#YOLO! No More Kyoto for
Us!