BIO220H1 Lecture Notes - Lecture 10: Lewis Fry Richardson, Svante Arrhenius, Milankovitch Cycles
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BIO220H1 Full Course Notes
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Lecture 10: greenhouse gases and climate change: earth has seen many changes in climate, accompanied by drastic shifts in biota, entered 5th major ice age about 2. 58 million years ago. Ice free earth, 55 million years ago, sea levels high and countries were underwater: since then, cycling between more and less lice. An ice age has alternating glacial and interglacial periods. Periodic cycle not much ice, temperature is warmer; ice is increasing, temperature is declining expanding and retreating. Cycle of glacial and interglacial periods ice. Tyndall first to measure how different gases absorbed radiation: discussed greenhouse effect of water vapour, water vapour was capable of absorbing radiation in raising temperature of a closed system. Eniac"s breakthrough prediction, 1950: predicted 24hrs of weather in 24hrs (roughly on same time scale, weighed 30 tons, more than 17000 vacuum tubes, 5 million solder joints. Intergovernmental panel on climate change: different groups working in various countries on.
