BIO220H1 Lecture Notes - Lecture 10: Svante Arrhenius, Primitive Equations, Chlorofluorocarbon
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Document Summary
Bio220 lecture 10: greenhouse gases and climate change. Earth experienced many climate changes, including ice age that alternates between glacial and interglacial periods. Entered 5th major ice age 2. 58 mya. The lines in red shows previous and present ice volumes. The green and blue lines indicate the change in temperature globally. Estimate from ice cores (gas compositions and make deductions on what the long-term climate would be. Interglacial period will end in 10-50 thousand years. Glacier period will return and sea level will drop. *short term predictions are different, mainly due to human activities. Human activity is opposing glacier period warming things up. Measured how radiations are absorbed by different gases. Greenhouse effect due to water vapour steam can trap heat. Measured the effects of co2 (being a greenhouse gas) Increase the concentration of co2 = increase global temp by 4 degrees. Co2 had slowed the radiation that are meant to be reflected out of earth.
