GEOG 1F91 Lecture Notes - Lecture 1: Mount Pinatubo, Siberian Traps, Sensible Heat
18 Feb 2016
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Document Summary
Global temp since 1880 land temperatures temperatures in acrtic. Natural climate change: greenhouse gas concentrations, volcanic activity, changes in solar output, changes in orbit/ tilt around the sun, plate tectonics and ocean currents, changes in earths albedo (land and atmosphere) Siberian traps (volcanoes) = co2, ch4, ash, so2. What do we do? (burn fossil fuels, change land use) Add ghg"s to atmosphere - disrupt energy balance- ehance the ghe. This enhancement" of the ghe is what we must address. By product respiration; small % ghg; annual fluctuations (diff. in photosynthesis) Climate change: tough to study: cant observe the system for a long enough time cycle, earth is a very complex system, feedbacks (negative/positive, we can"t conduct experiments, use all geographers tools. Real system math equations computer code numerical experiments. Each square = ocean depths and atmosphere height. By 2100 = increase of 1. 8 -4. 0 degrees celcius. Extreme events seasonal change runoff, evaporation soil moisture.
