Insolation is an acronym for “INcoming SOLar radiATION.” It represents the amount of solar energy that reaches a specific area of the Earth’s surface in a given time. The amount of insolation varies significantly based on the angle of the sun, the latitude of the location, the season and the clarity of the atmosphere. ANSWER: (B) Incoming solar radiation
What is ‘Insolation’? (A) The insulation of a building (B) Incoming solar radiation (C) Heat trapped by the greenhouse effect (D) The cooling of the Earth’s core
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Insolation is the primary driver of all weather and climate on Earth. Because the Earth is a sphere, the equator receives more direct, concentrated insolation than the poles, where the sun’s rays hit at a shallow angle and are spread over a larger area. This unequal heating creates the pressure differences that drive global wind patterns. Furthermore, seasonal changes are entirely due to the tilt of the Earth’s axis, which changes the angle of insolation throughout the year. Understanding insolation patterns is the key to understanding why different regions have vastly different climates and ecosystems.
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