Question

How does obliquity affect the climate?

Answer 1

Its effect on climate is measurable as incremental, for one half year, and decremental, for the other half.

Explanation:

At a place of latitude `theta^o` N/S, the angle of incidence of solar

rays has the annual range `theta +- ( obliquity ) 23.4^o`

If the change in the range is incremental in northern latitudes, it is

decremental in southern latitudes, and vice versa..

At a Solstice ( by about December 21 or June 23 )), the angle is

either the maximum `theta + 23.4^o` or the minimum `theta-23.4^o`..

The mean value `latitude` is attained at an equinox ( by about

March 21 or September 23 )..

This gradation, in every day radiation, affects climate at a place.

The absolute value for this rate of change ( `+-` ) is

`(4 X 23.4)/365.25`

= a quarter degree/day, nearly..

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