Environmental Science 1021F/G Lecture Notes - Lecture 11: Mauna Loa Observatory, Sulfur Dioxide, Global Warming
20 Mar 2016
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Document Summary
Global warming and global climate change are not the same thing: global warming: average temperate increases in troposphere, global climate change: changes in any aspect of earths climate. Ice cores taken from antarctica: air bubbles in ice cores analyzed. [ghg], solar activity, snowfall, forest fires, tropospheric temperature: sediment cores, analyze sediments for pollen, fossils, plants, from lakes, don"t forget plate tectonics Current: direct measurements of troposphere, air sample collection. Past global temperature and ghg changes: prolonged periods of cooling and warming, glacial and interglacial periods. We are in interglacial period: gradual (millions of years) to quick (10"s -- 1000"s of years) Volcanic eruption: emits sulphur dioxide (so2 highly reflective, high albedo), co2, water vapour, dust and ash. Ocean currents: great ocean conveyor belt (bringing warm water up, cold down, store co2 and heat, el nino warmer and wetter/ la nina colder and dryer (pacific ocean, every 7 years)
