3/19 ERS102 - o 1990- London meeting, phase out by 2000 o...

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The Factors of Climate Change o Can control amount of energy to earth by sunspots and astronomical theory 1. Precession 2. Eccentricity 3. Obliquity- tilt of axis o Amount of Energy that remains (leaves) at the Earth’s surface o SO2 (volcanic) reflect cooling o CO2 warming (greenhouse gases) o Ozone Hole does not = global warming!!!!!!!!!!!!!!!!!!!!!!!! Ozone o Formed in stratosphere = O3 (O2+ O1) o Oxygen + solar radiation o Anthropogenic Contributions to the Atmosphere CFC’s HFC’s PFC’s o Protection from UV radiation o “Hole” formed over poles V. cold conditions enhanced reaction Ozone Timetable o Noted in 1976- US academy of sciences. US, Canada, Sweden, Norway ban aerosol cans. EU rejects idea o 1983- US pushed for international solution o 1987- Montreal accord 50% reduction CFC’s by 1999
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Unformatted text preview: o 1990- London meeting, phase out by 2000 o 1992- Copenhagen, ban moved up to 1996 o 2024- detectable recovery predicted o 2068- levels back to 1980’s Naturally Occurring greenhouse gases H2) (water vapor)- volcanoes, hydrologic cycle CO2 (carbon dioxide) –volcanoes, weathering, respiration CH4 (methane) -volcanoes, wetlands, hydrocarbon leaks Human generated CO2 (carbon dioxide)- burning fossil fuels, deforestation CH4 (methane)- livestock, rice paddies, draining swamps, landfills, natural gas NiO2 (nitrous oxide)- agriculture (fertilizers, soil disturbance, burning fossil fuels) CFC’s (chlorofluorocarbons)-aerosols HFC’s (halfluorocompounds)-aerosols PFC’s (perfluorcarbon) - aerosols...
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This note was uploaded on 04/18/2008 for the course ERS 102 taught by Professor Kelley during the Spring '08 term at University of Maine Orono .

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