Thin layer brown haze

Megaw, W.J.

doi:10.1016/0021-8502(77)90059-3

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Furthermore, the perceived visual air quality is often determined by the color contrast and the loading of aerosols of different microstructure can change the sky color dramatically from clean and blue to turbid and yellowish or to brownish (e.g. Megaw, 1977;Dave, 1980;Groblicki et al, 1981) in a complex manner.…”

Section: Introductionmentioning

confidence: 99%

An investigation of aerosol microstructure on visual air quality

Tsay

Stephens

Greenwald

1991

Atmospheric Environment. Part A. General Topics

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Section: Introductionmentioning

confidence: 99%

An investigation of aerosol microstructure on visual air quality

Tsay

Stephens

Greenwald

1991

Atmospheric Environment. Part A. General Topics

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“…In the absence of a dust storm and away from desert regions, however, the concentration of soil-dust particles is generally low, and the effect of soil dust on atmospheric optics is limited. A thin layer of predominantly monodisperse droplets has also been observed to cause brown haze at some distance above ground by selective light scattering [11,13].…”

Section: Introductionmentioning

confidence: 99%

A New Type of Haze? The December 2015 Purple (Magenta) Haze Event in Nanjing, China

Liu

Wang

et al. 2017

Atmosphere

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A special and unusual purple (magenta) haze episode was observed in Nanjing, China, at 17:00 on 22 December 2015. Many local and national news outlets reported this event. Based on an analysis of the pollution features and meteorological factors, including boundary layer characteristics, we concluded that this haze event was similar in most respects to other local haze episodes. We discuss the reasons and the possibilities about this rare color haze at the end of the paper. One way to attain a combination of blue and red light is to have the green wavelengths selectively absorbed, and this seems unlikely for typical atmospheric constituents. Another way involves pollution gases or particles together with small liquid-water drops, which need further confirmation. A third possibility is that the combination of transmitted red light from the sun and scattered blue light from above could produce a purple/magenta color in the sky. In general, further studies are required to assess the physical, chemical, and optical features of this purple haze in order to explain and predict this phenomenon in the future.

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The occurrence and nature of brown plumes in Ontario

Melo

Stevens

1981

Atmospheric Environment (1967)

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Thin layer brown haze

Cited by 5 publications

References 4 publications

An investigation of aerosol microstructure on visual air quality

An investigation of aerosol microstructure on visual air quality

A New Type of Haze? The December 2015 Purple (Magenta) Haze Event in Nanjing, China

The occurrence and nature of brown plumes in Ontario

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