Natural causes of Climate change
- Created by: amtani20
- Created on: 08-02-18 20:17
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- Natural causes of climate change
- Sunspots
- Black spots on the suns surface
- Number of sunspots increases from min to max to min over a 11 year period
- Maximum sunspots means more heat and solar flares
- Minimum reduces solar output and therefore lower temperatures
- Very few in 1645-1715 coincided with little ice age
- The Milankovitch cycles
- Precession
- Natural wobble of earth lasting 26,000 year cycle
- Causes difference in hemisphere climates with closer having warmer weather
- Eccentricity
- Earth's orbit changes from circular to elliptical back to circular every 100,000 years
- The earth is further from the sun in elliptical orbit and so less solar radiation
- Axial Tilt
- Earth's axis moves between two extremes 21.5 and 24.5 degrees in 41,000 years
- Increased tilt will cause summers to be warmer and winters colder
- Precession
- Volcanic activity
- Small droplets cans spread worldwide in the stratosphere for months causing wide spread cooling
- Large volcanic ash particles could block out sun causing cooling
- Short term cooling
- Fine droplets convert sulfur dioxide into sulphric acid that refelcts the sun's radiation
- Long last cooling
- Small droplets cans spread worldwide in the stratosphere for months causing wide spread cooling
- Long last cooling
- Sunspots
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