GEOS2115 Lecture Notes - Lecture 22: Anthracite, Exponential Growth, Ocean Acidification
10 Sep 2018
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Spiralling global temperature ~> strong temperature changes ~> el nino. Rcp 2. 6 & rcp 8. 5 = 2 extremes: changes in surface temperature, sea ice content, ocean surface ph. Current rate: ~2ppm/yr: from emission, and deforestation. Concentration continues to rise but still some uncertainties. Increase in carbon emission = increase in population x quality of life (change in carbon emission per person) x efficiency of carbon use: population, economic, technological growth. Population: 2013 = population tipped over 7 billion mark, trend: exponential growth then tails off, reason (tail off): (developing countries) better education decrease reproduction decrease rate of population growth. Co2: rise in business consumption eventually tails off because have exhausted all resources, oil/gas runs out switch to coal (anthracite vs. bituminous) tar sands/oil shales. Current = 2 x co2 path (of preindustrial rates) 4 x co2 = little effort (cid:862)orgy(cid:863) of fossil fuel co(cid:374)su(cid:373)ptio(cid:374) Best information: from antarctica ice sheets (geologic record)
