Why is the clear sky in the north bluer than that in the south?

Why is the clear sky blue? Author: When sunlight enters the atmosphere, it will scatter when it meets atmospheric molecules and particles suspended in the atmosphere. These atmospheric molecules become the light source of scattered light. They are scattered in all directions ... this is because the sun's rays are scattered by atmospheric molecules and particles suspended in the atmosphere ... For lower air molecules, mainly blue light is scattered, so the sky is blue. Scattered purple, blue and cyan light fills the sky, making it appear blue. ... the sky ... the correct explanation of why the sky is blue begins with 1859. Scientist Tedor first discovered that the scattering of blue light is much stronger than that of red light ... Dust and other particles in the atmosphere scatter blue light more than other photons with longer wavelengths, so the sky looks blue. There are two main types of light scattering in the atmosphere: Dindar scattering and Rayleigh scattering. Among them, dust, water mist ... References:

Mario? Jose? Molina, why is the sky blue? "... reflecting blue ... the refraction angle of each color of light is different. There are seven colors in sunlight: red, orange, yellow, green, blue, indigo ... The sky is colorless, but it is colored because of the refraction of sunlight. That's why the sky at night ... the earth rambles: why is the clear sky blue? After sunlight enters the atmosphere, it meets the atmosphere ... isn't the air in the sky colorless? Then why is the clear sky blue? Is it high in the sky ... after the heavy rain, have you found that the sky will become bluer? The clearer the weather is, the bluer the sky will be, because there will be a lot of dust particles, water droplets and ice crystals in cloudy air, and the color of the sky is formed by sunlight directly shining on the ground through the atmosphere and then reflecting. The blue, purple, indigo and other colors with shorter wavelengths are easily suspended in the air ... The blue of the sky is atmospheric molecules. When sunlight enters the atmosphere, long-wavelength colored light, such as red light, has great transmission power and can penetrate the atmosphere and shoot to the ground; And violet, blue and cyan light with short wavelengths, ...