Development and Application of a Dual-Impedance Radial Diffusion Model to Simulate the Partitioning of Semivolatile Organic Compounds in Combustion Aerosols

1997 ◽  
Vol 31 (10) ◽  
pp. 2983-2990 ◽  
Author(s):  
Michael R. Strommen ◽  
Richard M. Kamens
Keyword(s):  
Organic Compounds ◽  
Diffusion Model ◽  
Radial Diffusion ◽  
Semivolatile Organic Compounds ◽  
Combustion Aerosols

The effect of reduction measures on concentrations of hazardous semivolatile organic compounds in indoor air and dust of Swedish preschools

Indoor Air ◽  
2021 ◽  
Author(s):  
Sarka Langer ◽  
Cynthia A. de Wit ◽  
Georgios Giovanoulis ◽  
Jenny Fäldt ◽  
Linnéa Karlson
Keyword(s):  
Organic Compounds ◽  
Indoor Air ◽  
Semivolatile Organic Compounds

Diurnal Variations of Air-Soil Exchange of Semivolatile Organic Compounds (PAHs, PCBs, OCPs, and PBDEs) in a Central European Receptor Area

2016 ◽  
Vol 50 (8) ◽  
pp. 4278-4288 ◽  
Author(s):  
Céline Degrendele ◽  
Ondřej Audy ◽  
Jakub Hofman ◽  
Jiři Kučerik ◽  
Petr Kukučka ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Diurnal Variations ◽  
Semivolatile Organic Compounds ◽  
Central European

scholarly journals Radial diffusion modeling with empirical lifetimes: comparison with CRRES observations

2005 ◽  
Vol 23 (4) ◽  
pp. 1467-1471 ◽  
Author(s):  
Y. Y. Shprits ◽  
R. M. Thorne ◽  
G. D. Reeves ◽  
R. Friedel
Keyword(s):  
Diffusion Model ◽  
Radiation Effects ◽  
Outer Zone ◽  
Recovery Phase ◽  
Decay Rates ◽  
Radial Diffusion ◽  
Main Phase ◽  
Relativistic Electrons ◽  
Storm Main Phase ◽  
Order Of Magnitude

Abstract. A time dependent radial diffusion model is used to quantify the competing effects of inward radial diffusion and losses on the distribution of the outer zone relativistic electrons. The rate of radial diffusion is parameterized by Kp with the loss time as an adjustable parameter. Comparison with HEEF data taken over 500 Combined Release and Radiation Effects Satellite (CRRES) orbits indicates that 1-MeV electron lifetimes near the peak of the outer zone are less than a day during the storm main phase and few days under less disturbed conditions. These values are comparable to independent estimates of the storm time loss rate due to scattering by EMIC waves and chorus emission, and also provide an acceptable representation of electron decay rates following the storm time injection. Although our radial diffusion model, with data derived lifetimes, is able to simulate many features of the variability of outer zone fluxes and predicts fluxes within one order of magnitude accuracy for most of the storms and L values, it fails to reproduce the magnitude of flux changes and the gradual build up of fluxes observed during the recovery phase of many storms. To address these differences future modeling should include an additional local acceleration source and also attempt to simulate the pronounced loss of electrons during the main phase of certain storms.

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