Sun (Solar constant, TSI) Cosmic material (H +, Dust) Celestial mechanics ( Extra-atmospheric solar…

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Main features of the present earth’s climate 1)Mean surface air temperature ≈ 15°C 2)Mean precipitation ≈ 1 m w.e. 3)Equator to Pole temperature gradient ≈ 50°C 4)Climate changes. (It has always been changing.)