climate change and rising seas environmental science 21 october 2009 donald winslow readings:...
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Climate change and rising seas
Environmental Science21 October 2009Donald Winslow
Readings:Withgott & Brennan 2009 Essential Environment,
3rd ed., Ch 14 pp 303-325
Lester Brown, Plan B 3.0, www.earth-policy.orgChapter 3
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Climate change
Milankovitch cycles
CO2 and temperature
Anthropogenic climate change
CO2 emissions
CH4 emissions
Intergovernmental Panel on Climate Change
Remedies
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Milankovitch cycles
Shape of Earth's orbit
Tilt of axis
Wobble
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CO2 and temperature
http://www.ipcc.ch
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Anthropogenic climate changeEvidence & effects
Temperature, CO2, melting ice, rising seas
Hurricanes
Species distributions
Pronounced warming at higher latititudes
Increases in photosynthesis from increased CO2
Decreases in photosynthesis from increased T
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Civilization & the New World
Readings from Lester Brown 2008. Plan B 3.0; Chapter 3
http://www.earth-policy.org/Books/PB3/index.htm
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Features of Plan B
Electronic version available as pdf files References Data sets as xls files “Cutting carbon emissions 80% by 2020”
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Rising temperatures & rising seas
Effects of rising temperature Crop yield Reservoirs in the sky Melting ice & rising seas Destructive storms Cutting carbon emissions 80% by 2020
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Sea level rise
IPCC estimate 18-59 cm by 2100 Intergovernmental Panel on Climate Change www.ipcc.ch Estimate based on data thru 2006
Considering 2007 melting, maybe 200 cm After Greenland & West Antarctic Ice Sheet
melt: 700-1200 cm
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Arctic ice on 16 September 2008
Photo by NASA/Goddard Space Flight Center, via Reuters
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EPA study of sea level rise
http://epa.gov/climatechange/effects/coastal/slrmaps.html
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Gulf of Mexico after 12 m rise in sea level
http://flood.firetree.net/?ll=23.3624,-85.4297&z=12&m=12
Alex@firetree in the UK
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Montane glacial melt
Implications for agriculture Himalayas & Tibetan Plateau
Feed all major rivers of China & India Necessary for rice production
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Remedies
Emission reduction Carbon sequestration Increasing albedo Adapting to change