Environmental Engineering Reference
In-Depth Information
Figure 2.13
(a) Exposure of Earth to the sun's radiation at
the solstices and the equinoxes; (b) position of the midday sun
(1) at the equator and (2) at 50° N at the solstices and the
equinoxes.
same. It is clear from Figure 2.12 that, taking an annual figure, the tropics would receive
the most radiation, as the input never falls to low values, unlike the situation at the poles,
where twenty-four hours of daylight in summer become twenty-four hours of darkness in
winter.
