Climate change module

Climate change module - Christopher Christie Shifting...

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1 Climate change: What does the future hold? 2007 Diffenbaugh et al. 2008. Geophysical Research Letters Summary • Average temperatures increased 0.8°C over last 100 yrs. • Current warming greater than at least last 2,000 years, and probably 10,000 years. •C l im a t e m o d e l s must incorporate natural and anthropogenic drivers to account for warming in 1900s. • Mainstream model predictions of T by the year 2100 range from +1.8 to +4°C. • Temperature and precipitation effect will vary spatially. • Variance in climate will increase. • Melting of the ice sheets will influence climate change and
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2 Root et al. 2003 Nature 421:57-60 Phenological changes Loarie et al. 2008
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Unformatted text preview: Christopher Christie Shifting niches Loarie et al. 2008. PLOS 3 Aboveground heating, +1.5C Sprinkler and drip irrigation, 150% ambient precip Elevated CO 2, 700 ppm N applied to surface as encapsulated calcium nitrate Nutrient flows 4 IPCC 2007 Disturbance regimes http://fire.feric.ca/Conference/GarySafetySummit/2002SevereDroughtSafetyA.htm Phenological changes + Niche shifts + Nutrient flow changes + Disturbance changes Community Disassembly 5 Evolution IPCC 2007 IPCC 2007 So what do we do about it all? Personal actions: Reduce carbon footprint (can be complicated to know whats right) Societal actions (Policies): Facilitate reduction of carbon footprint, including technological development Population control Foster equity 6 Overall, then: Changes in physical parameters Shifts in social structure Biotic evolution, including Homo Shifts in biotic community structure Cultural evolution...
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This note was uploaded on 11/08/2009 for the course HUMBIO 2A taught by Professor Boggs,c;durham,w during the Spring '08 term at Stanford.

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Climate change module - Christopher Christie Shifting...

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