What is Haze?

Definition of Haze

A slight obscuration of the lower atmosphere, typically caused by fine suspended particles.

Resulting in:

• The reduction of Clarity and Color of our vision

Due to the scattering and absorption of sunlight by tiny pollution particles in the air.

 

Where do the Pollutants come from?

Consist of:

1. Natural Sources
2. Man-Made Sources

Natural Sources

• Dust & Soot from Forest fires
• Dry weather

Man-Made Sources

• Motor vehicles
• Electricity Generation
• Manufacturing Operations

 

Some are emitted into the air, while others are formed when the gases react to form particles in the air.

 

Chemical Composition of the Pollutants

They are made up of a mixture of Air-borne pollutants:

• Soot Particles (PM₁₀ and PM_2.5)
• Carbon Monoxide (CO)
• Carbon Dioxide (CO₂)
• Methane (CH₄)
• Non-methane hydrocarbons;  NO_x & SO₂

Haze Formation

 

References

Salinas, S. V.; Chew, B. N.; Miettinen, J.; Campbell, J. R.; Welton, E. J.; Reid, J. S.; Yu, L. E.; Liew, S. C., Atmospheric Research 2013, 122 (0), 555-570

Forsyth, T., Global Environmental Change 2014, 25 (0), 76-86

Atreya, S. K., Faraday Discussions 2010, 147 (0), 9-29.

http://eresources.nlb.gov.sg/infopedia/articles/SIP_2013-08-30_185150.html