Spending much of the recent summer time neck cocked, gazing at the sky. I have begun to wonder dose the color of the sky change along side atmospheric sway?  And why are sunsets red, pink, yellow and orange. Observing the Chicago sky, over Humboldt Park, there seems to be a white haze, a mistiness that often colors the sky, mid day through sunset.

  Sky color changes with season. Often times the summer sky is generally more congested in appearance than other seasons. The air circulation is generally weaker during the summer months. This is not the only explanation for white hazed skies. Pollution particles that are often present in summer time haze are not wavelength dependant and there for weakens the vibrancy or the day time blue and makes sunsets pink and yellow instead of red and orange.  It is because red and orange wavelengths are longer than violet wavelengths that in the misty sunsets and sunrises of Humboldt Park they show yellow and pink. It is the distance that the wavelength has t to travel to the eyes, through the summer particles, that give its dazed hue.

http://www.spc.noaa.gov/publications/corfidi/sunset/

http://science.hq.nasa.gov/kids/imagers/ems/visible.html