INSOLATION AND HEAT BUDGET#
INSOLATION:

The incoming solar radiation or the energy that the earth receives from the sun is known as Insolation.
- Only approximately 52 per cent of this insolation reaches the earth's surface.
- The rest is absorbed by water vapour , dust and clouds, or is reflected by the Earth's surface and scattered by particles in the air.

- A heat budget is a perfect balance between incoming heat (insolation) absorbed by the earth and outgoing heat (terrestrial radiation) escaping it in the form of radiation.
- If the incoming heat and the outgoing heat are not balanced, then Earth would be getting either too warmer or cooler.
- Since these are perfectly balanced the earth is neither too warm nor too cold.
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