?Why is the sky yellow
The colors of the sky often amaze us, with blue being the most common during the day and reds or oranges at sunset. However, a yellow sky can be an unusual and striking phenomenon. This article explores the reasons behind a yellow sky and examines the natural and man-made factors that contribute to this rare occurrence.
Natural Factors
1-Dust and Pollution
One of the primary causes of yellow skies is the presence of dust and pollution in the atmosphere. When there are high levels of particulate matter, such as dust, dirt, or smoke, these particles scatter sunlight differently than clear air. This scattering causes the sky to appear yellow or even brownish. This phenomenon is especially common in urban areas or during forest fires.
Atmospheric Conditions-2
Certain atmospheric conditions, such as the presence of pollen or volcanic ash, can also cause the sky to appear yellow. For example, volcanic eruptions can release massive amounts of ash and sulfur dioxide into the atmosphere, resulting in vibrant yellow and orange sunsets and sunrises.
Meteorological Phenomena
1- Weather Fronts
Weather fronts can affect the color of the sky. When a cold front moves in, it can trap dust and other particles in the atmosphere, causing a yellowish tint. Similarly, approaching storms can stir up particles and moisture, contributing to a yellow sky.
2-Sun Angle
The angle of the sun can also play a role in the color of the sky. At sunrise or sunset, the sun is lower in the sky and its light must pass through more of the Earth's atmosphere. This increased distance causes more scattering of shorter wavelengths (blue and violet light), leaving longer wavelengths (yellow, orange, and red) more prominent.
Human Activity
Pollution
Human activities such as industrial processes, vehicle emissions, and agricultural practices contribute significantly to air pollution. High levels of nitrogen dioxide.
