Spectral measurement of the complex refractive index of fly ashes of canadian lignite and sub‐bituminous coals

Lohi, Ali; Wynnyckyj, J. R.; Rhodes, E. J.

doi:10.1002/cjce.5450700419

Cited by 25 publications

(7 citation statements)

References 20 publications

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“…In order to properly simulate the scattering processes, accurate information on particle refractive index are required, beyond those on particle size distribution already provided above. Accurate measurements of lignite refractive index were reported by Lohi et al (1992), who observed values of the real and imaginary part of the complex refractive index of 1.70 and 1 × 10 −6 , respectively. Similar values were reported by McCartney and Ergun (1962) and Read (2008).…”

Section: Hygroscopic and Scattering Behaviour Of Lignite Particlesmentioning

confidence: 59%

Clear-air lidar dark band

et al. 2018

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Abstract. This paper illustrates measurements carried out by the Raman lidar BASIL in the frame of the HD(CP) 2 Observational Prototype Experiment (HOPE), revealing the presence of a clear-air dark band phenomenon (i.e. a minimum in lidar backscatter echoes) in the upper portion of the convective boundary layer. The phenomenon is clearly distinguishable in the lidar backscatter echoes at 532 and 1064 nm, as well as in the particle depolarisation data. This phenomenon is attributed to the presence of lignite aerosol particles advected from the surrounding open pit mines in the vicinity of the measuring site. The paper provides evidence of the phenomenon and illustrates possible interpretations for its occurrence.

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Section: Hygroscopic and Scattering Behaviour Of Lignite Particlesmentioning

confidence: 59%

Clear-air lidar dark band

et al. 2018

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“…Accurate measurements of lignite refractive index were reported by Lohi et al (1992), who observed values of the real and the size growth experienced by these particles during their adiabatic ascent. Thus, we believe that the observed dark band phenomenon is associated with the oscillations in particle backscattering efficiency, ultimately leading to Mie back-scattered signal intensity fluctuations.…”

mentioning

confidence: 57%

Clear-air lidar dark band

Girolamo¹,

Scoccione²,

Cacciani³

et al. 2017

Preprint

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Abstract. This paper illustrates measurements carried out by the Raman lidar BASIL in the frame of the HD(CP)2) Observational Prototype Experiment (HOPE), revealing the presence of a clear-air dark band phenomenon (i.e. a minimum in lidar backscatter echoes) in the upper portion of the convective boundary layer. The phenomenon is clearly distinguishable in the lidar backscatter echoes at 532 and 1064 nm, as well as in the particle depolarization data. This phenomenon is 10 attributed to the presence of lignite aerosol particles advected from the surrounding open pit mines in the vicinity of the measuring site. The paper provides evidence of the phenomenon and illustrates possible interpretations for its occurrence.

show abstract

“…In order to properly simulate these scattering processes, accurate information on particle refractive index are required, besides those on particle size distribution already provided above. Accurate measurements of lignite refractive index have been reported by Lohi et al (1992) [6], who observed values of the real and imaginary part of the complex refractive index of 1.70 and 1x10 -6 , respectively. Simulations of the scattering properties of lignite particles are illustrated in figure 4.…”

Section: Hygroscopic and Scattering Behavior Of Lignite Particlesmentioning

confidence: 72%

Clear-air lidar dark band

et al. 2018

View full text Add to dashboard Cite

This paper illustrates measurements carried out by the Raman lidar BASIL in the frame of HOPE, revealing the presence of a clear-air dark band phenomenon (i.e. the appearance of a minimum in lidar backscatter echoes) in the upper portion of the convective boundary layer. The phenomenon is clearly distinguishable in the lidar backscatter echoes at 1064 nm. This phenomenon is attributed to the presence of lignite aerosol particles advected from the surrounding open pit mines in the vicinity of the measuring site.

show abstract

Spectral measurement of the complex refractive index of fly ashes of canadian lignite and sub‐bituminous coals

Cited by 25 publications

References 20 publications

Clear-air lidar dark band

Clear-air lidar dark band

Clear-air lidar dark band

Clear-air lidar dark band

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