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Tegen and Lacis 1996

Tegen, I., and A.A. Lacis, 1996: Modeling of particle size distribution and its influence on the radiative properties of mineral dust aerosol. J. Geophys. Res., 101, 19237-19244, doi:10.1029/95JD03610.

The radiative parameters of mineral aerosls are strongly dependent on particle size. Therefore explicit modeling of particle size distribution is needed to calculate the radiative effects and the climate impact of mineral dust. We describe a parameterization of the global mineral aerosol size distribution in a transport model using eight size classes between 0.1 and 10 µm. The model prescribes the initial size distribution using soil texture data and aerosol size measurements close to the ground. During transport, the size distribution changes as larger particles settle out faster than smaller particles. Results of Mie scattering calculations of radiative parameters (extinction efficiency, single scattering albedo, asymmetry parameter) of mineral dust are shown at wavelengths between 0.3 and 30 µm for effective particle radii between 0.1 and 10 µm. Also included are radiative properties (reflection, absorption, transmission) calculated for a dust optical thickness of 0.1. Preliminary studies with the Goddard Institute for Space Studies (GISS) general circulation model (GCM), using two particle size modes, show regional changes in radiative flux at the top of the atmosphere as largae as +15 W/m² at solar and +5 W/m² at thermal wavelengths in the annual mean, indicating that dust forcing is an important factor in the global radiation budget.

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@article{te08000d,
  author={Tegen, I. and Lacis, A. A.},
  title={Modeling of particle size distribution and its influence on the radiative properties of mineral dust aerosol},
  year={1996},
  journal={Journal of Geophysical Research},
  volume={101},
  pages={19237--19244},
  doi={10.1029/95JD03610},
}

TY  - JOUR
ID  - te08000d
AU  - Tegen, I.
AU  - Lacis, A. A.
PY  - 1996
TI  - Modeling of particle size distribution and its influence on the radiative properties of mineral dust aerosol
JA  - J. Geophys. Res.
JO  - Journal of Geophysical Research
VL  - 101
SP  - 19237
EP  - 19244
DO  - 10.1029/95JD03610
ER  -

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