SIO 15 Lecture Notes - Lecture 22: Coronal Mass Ejection, Kyoto Protocol, Ocean Acidification
19 Dec 2018
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Lecture 22: anthropogenic changes: atmosphere sunspot cycle: 11 year cycle. Globabl temp inc . 6 degrees c in last century changes in solar activity (solar flares, coronal mass ejections) Ozone: solar raditation converts o2 o3, protects uv radiation in stratosphere but is a greenhouse gas and a pollutant in troposphere. Cfcs: human origin, destroys protecting stratospheric ozone layer, sources (air conditioning and refrigerators, foam insulations propellant in aerosol cans) co2 measured from trapped bubbles in ice cores consequences of global warming: unevern warming, more extreme weather. Human co2= fossil fuel buring, deforestation, cement production. Human ch4= fossil fuel mining/production, cattle farming, rice paddies, waste disposal. 85% of earth"s heat went into oceans (high heat capacity) oceans slow down global warming. Oceans take up co2 slow warming but ocean acidification. Warming causes east coast: flooding and erosion, north: ice melt, south: wildfires, floods, droughts midwest: heat, droughts, storms seasonal variation much smaller than overall increase of keeling curve.
