Free Solar Pro - Sunlight - Radiation
Different amounts of solar energy dependent on the seasons
On the Earth, solar radiation appears as sunlight and is obvious when the sun is above the horizon. This can be seen during the daytime, and also near the poles during the summer nights. But, in the winter, this light cannot be seen at night near the poles.
When there is direct radiation that is not blocked by
clouds, this is experienced as sunshine, which combines the feeling of bright
white light and warmth. The warmth is also
distinguished by a rise in air temperature.
The total insolation, or direct solar intensity, remains constant from the sun, but varies depending on seasonal and latitudinal distribution.
For example, if you live at 65 degrees latitude, the change in solar energy between summer and winter months can vary as much as 25%. Mostly, these changes offset each other and the annual average insolation remains zero. But the redistribution of the solar energy between the summer and winter months can strongly affect the intensity of the seasonal cycles. This can be linked to the coming and going of recent ice-ages.
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