Write short notes on: Causes of climate change
Write short notes on:
Causes of climate change
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- Though human activities are a major cause for climate change, some natural causes are responsible for climate change. Following are some of the natural causes of climate change: The amount of energy output by the sun is not the same always. Low energy output by sun can reduce amount of insolation received by the earth. This can lead to cooling of earth.
- Another cause is the Milankovitch oscillation. Variations in the earth’s orbital characteristics around the sun and the changes in the earth’s axial tilt occur. These factors cause the earth to be closer to the sun (warmer) or farther from the sun (colder). Ice ages can occur when we are farther from the sun.
- Volcanism is considered as another cause for climate change. Volcanic eruptions throw lots of particulates, and aerosols into the atmosphere. The winds spread it around the world reducing the sun’s radiation reaching the earth’s surface.
- The habitable zone of the earth is called Goldilocks Zone. It means as the size of the sun increases, the zone moves outwards overtime. Such changes in zone causes earth to warm or cool.
- Besides natural causes, anthropogenic activities affect the climate. The emission of CO2 from fossil fuel combustion. Large-scale deforesting also increases CO2 . It takes around 20 to 25 years to adjust these high levels of CO2 .
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