Spectral absorption of solar radiation by the denver brown (pollution) cloud

Deluisi, John; Bonelli, Joseph E.; Shelden, C. E.

doi:10.1016/0004-6981(77)90045-2

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…During the formation of OH and HO 2 radicals, there is also use and/or transfer of light energy to chemical energy, similar to the UV region [22]. More studies have reported the absorption, e.g., the pollution cloud absorbs solar radiation (0.53-3.30 µm) rather strongly compared with natural aerosols [66].…”

Section: The Meaning Of the Absorbing Termmentioning

confidence: 99%

Global Solar Radiation Transfer and Its Loss in the Atmosphere

Bai

Zong

2021

Applied Sciences

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Based on the analysis of solar radiation and meteorological parameters measured at a subtropical forest in China during 2013–2016, a new empirical model of global solar irradiance has been developed. It can calculate global solar irradiance at the ground and at the top of the atmosphere (TOA); both are in agreement with the observations. This model is used to calculate the extinction of global solar irradiance in the atmosphere and the contributions from absorbing and scattering substances. The loss of global solar irradiance is dominated by absorbing and absorbing substances. The results show clear seasonal and interannual variations during the observation period. Sensitivity analysis indicates that global solar irradiance is more sensitive to changes in scattering, quantified by the S/G factor (S and G are diffuse and global solar radiation, respectively), than to changes in absorption. The relationships between the extinction factor (AF) of G and S/G and between the AF and the aerosol optical depth (AOD) are determined and used to estimate S/G and the AOD from the measured AF. This empirical model is applied to calculate the albedos at the TOA and the ground. This empirical model is useful to study global solar radiation and the energy–atmosphere interactions.

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Section: The Meaning Of the Absorbing Termmentioning

confidence: 99%

Global Solar Radiation Transfer and Its Loss in the Atmosphere

Bai

Zong

2021

Applied Sciences

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“…The procedure used in the present work follows essentially that used earlier by DeLuisi (1967). An Umkehr curve is calculated for a molecular atmosphere with dust scattering and extinction, and another Umkehr curve is calculated for a purely molecular atmosphere.…”

Section: Methodsmentioning

confidence: 99%

Theoretically determined multiple‐scattering effects of dust on Umkehr observations

Deluisi

Herman

Browning

et al. 1975

Quart J Royal Meteoro Soc

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SUMMARYAn earlier theoretical treatment by DeLuisi (1967) of the optical effect of dust on Umkehr observations, yielded some differences from dust effects determined by an experimental method. The differences were thought to be due to errors in the observations used to obtain the experimental results, and the primaryscattering restriction imposed on the theoretical calculations. A theoretical investigation was performed recently to assess the effect of multiple-scattering in an atmosphere with dust. The new results are in better agreement with the experimental data and apparently explain nearly all the differences encountered with the theoretical primary-scattering results.

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“…In heavily polluted air, aerosol particles scatter the sun's blue, green, and red light, providing a source of white light to a viewer from all points along the horizon [4,5]. By analyzing the solar radiation, Delusis et al (1977) suggested that the absorption rate of the polluted air is about four times that for natural aerosols, and some gases such as NO 2 , O 3 , and H 2 O might increase the absorption [7].…”

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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Spectral absorption of solar radiation by the denver brown (pollution) cloud

Cited by 10 publications

References 6 publications

Global Solar Radiation Transfer and Its Loss in the Atmosphere

Global Solar Radiation Transfer and Its Loss in the Atmosphere

Theoretically determined multiple‐scattering effects of dust on Umkehr observations

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

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