What is the seasonal variation law of sun height at noon?

(1) Equinox: At noon, the height of the sun decreases from the equator to the north.

(2) Summer solstice: At noon, the height of the sun decreases from the tropic of cancer to the north.

(3) Equinox: At noon, the height of the sun decreases from the equator to the north.

(4) Winter solstice: At noon, the height of the sun decreases from the tropic of Capricorn to the north.

The latitude distribution law of the variation range of noon solar height (the maximum difference of annual noon solar height) is as follows:

(1) The maximum difference of midday sun height between equatorial region and polar region is 23 26'.

(2) In the area (or tropical area) between 0 and 23 26' south latitude, the maximum difference of annual noon sun height increases from 23 26' to 46 52'.

(3) Between 23 26 ′ and 66 34 ′ south latitude (or the temperate zone between north and south), the maximum difference of annual midday sun height is 46 52 ′.

(4) During the period from 66 34 ′ south latitude to the extreme point (or the cold zone between north and south), the maximum difference of annual noon sun height decreased from 46 52 ′ to 23 26 ′.