EARTH 114 Lecture Notes - Lecture 7: Radiative Forcing, Black Carbon, Renewable Energy
21 Apr 2017
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Document Summary
Renewable energy - naturally occurring and replenishable: wind (mi = 5%, hydroelectric (mi = <1%, solar (mi = <1%, geothermal (mi = <1%, nuclear energy = not considered renewable. Aerosols: direct effect: aerosols reflect and scatter incoming solar radiation (negative radiative forcing = net cooling) Indirect effect: aerosols influence cloud properties (albedo, lifetime, precipitation, height, droplet size) and ice surface (black carbon) Volcanoes: volcanoes emit some co2, volcanoes count for 100 million tons of co2 we are emitting 10 gigatons into the atmosphere, volcanoes are about 1% of what we are emitting. Impacts of global warming: dangerous climate change, we are going to hit ~500 ppm co2 scales out to an additional global surface temperature increase of >3 degrees c by 2100 if we keep going the way we are.
