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Climate Change

QuestionAnswer
Climate long time scale
weather short time scale
current level of CO2 in atmosphere 394 ppm
processes that could cause climeate change on a global scale 1)plate tectonics 2)volcanic activity 3)changes in sun strength (sunspots) 4)Variation in Earth's orbit around the sun
Plate tectonics long term, change in plate configuration will lead to change in ocean currents and lead to a change in climate
volcanic activity short term, gases emitted will change climate
Changes in Sun strength (sunspots) short term, sunspots cause more energy to be put on Earth
Variation in Earth's orbit around the sun long term, effect the amount of solar radiation on Earth
Little Ice Age ~1500-1850, could be cause by low solar activity
Late Cenozoic Ice Age began 2 million years ago, dramatic cooling caused by variation in Earth's orbit around the sun
Milankovitch Theory earth's orbital variations affect climate change on a global scale
3 ways earth's orbit can vary 1)Eccentricity 2)Obliquity (tilt) 3)precession (wobble)
peak of last glacial advance 20,000 years ago
sea level correlations with glacial/interglacial cycles high sea level = interglacial cycle low seal level = glacial cycle
present-day ice sheet locations Greenland and Antarctica
carbon cycle sources and sinks of carbon, people are a part of it now
What supports anthropogenic contribution to global warming increase in atmospheric CO2 (Keeling Curve), global sea level rising, air bubble in ice cores
IPCC intergovernmental panel on climate change
warmest year on record 2010
Created by: jenniferbailey
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