Fil:Oblique rays 04 Pengo.svg
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This version shows a slight Spring or Autumn axial tilt to the Earth.
Why the polar regions are colder: Effect of the Earth's shape and atmosphere on incoming solar radiation.
Compared to equatorial regions (b), incoming solar radiation of the polar regions (a) is less intense for two reasons:
Tropical areas (i.e. lower latitudes, nearer the equator) receive solar radiation which is closer to vertical.
The angle of incidence of the rays, combined with the albedo of the surface has also a strong influence on the amount of energy being absorbed (or reflected) at the surface. In the ice-covered polar zones, almost all direct energy from the sun is reflected because it is white and the angle is small. In short, the angle of incidence affects the heating of the surface in 3 different ways: length of atmospheric track, variable flux and variable reflection
For simplicity, the diagram ignores the axial tilt of the Earth, which causes each pole to slip into darkness for around 6 months of the year, and means the equator's ground is generally not perpendicular with the sun's light.
Based on diagrams in:
Photo credit: Peter Halasz. (User:Pengo)
For the Creative Commons license, please give attribution to:
http://commons.wikimedia.org/wiki/File:Oblique_rays_04_Pengo.svg
Although not a requirement of the license, if you use this image in print or media other than the web, I would appreciate it if you let me know. Please contact me if you require alternate licensing.
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Dato/klokkeslett | Miniatyrbilde | Dimensjoner | Bruker | Kommentar | |
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nåværende | 21. mai 2021 kl. 13:10 | 800 × 600 (38 KB) | Bosogo | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ky. | |
5. apr. 2016 kl. 11:50 | 800 × 600 (25 KB) | Pengo | Reverted to version as of 23:41, 29 June 2007 (UTC) -- please use a different filename for translation | ||
21. mar. 2016 kl. 13:08 | 512 × 442 (5 KB) | Sjoel | This image is a translation into catalan from the original image. | ||
30. jun. 2007 kl. 01:41 | 800 × 600 (25 KB) | Pengo | See Oblique rays 02 Pengo.svg for details. {{Pengo2}} |
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