The Uneven Distribution of Insolation

Intro to Physical GeographyChapter 2

Distribution of Insolation

The places where the sun is perpendicular, or overhead, is the subsolar point All other places receive diffuse insolation Insolation: incoming solar radiation.

Tropics receive more concentrated insolation due to Earth’s curvature 2.5× more insolation than poles!

Daily Insolation Receipts at Four Locations

Daily Energy Receipts

Daily Energy Receipts

Daily Energy Reciepts

Daily Net Radiation (Energy)