scholarly journals Coupled infrared extinction and size distribution measurements for several clay components of mineral dust aerosol

2008 ◽  
Vol 113 (D1) ◽  
Author(s):  
Paula K. Hudson ◽  
Elizabeth R. Gibson ◽  
Mark A. Young ◽  
Paul D. Kleiber ◽  
Vicki H. Grassian
Keyword(s):  
Size Distribution ◽  
Mineral Dust ◽  
Dust Aerosol ◽  
Infrared Extinction

Infrared extinction spectra of mineral dust aerosol: Single components and complex mixtures

2012 ◽  
Vol 117 (D18) ◽  
pp. n/a-n/a ◽  
Author(s):  
Olga Laskina ◽  
Mark A. Young ◽  
Paul D. Kleiber ◽  
Vicki H. Grassian
Keyword(s):  
Mineral Dust ◽  
Dust Aerosol ◽  
Complex Mixtures ◽  
Extinction Spectra ◽  
Infrared Extinction

scholarly journals A combined laboratory and modeling study of the infrared extinction and visible light scattering properties of mineral dust aerosol

2013 ◽  
Vol 118 (2) ◽  
pp. 435-452 ◽  
Author(s):  
Jennifer M. Alexander ◽  
Olga Laskina ◽  
Brian Meland ◽  
Mark A. Young ◽  
Vicki H. Grassian ◽  
...  
Keyword(s):  
Light Scattering ◽  
Visible Light ◽  
Mineral Dust ◽  
Dust Aerosol ◽  
Infrared Extinction ◽  
Modeling Study

scholarly journals Effects of mineral dust on global atmospheric nitrate concentrations

2015 ◽  
Vol 15 (8) ◽  
pp. 11525-11572 ◽  
Author(s):  
V. A. Karydis ◽  
A. P. Tsimpidi ◽  
A. Pozzer ◽  
M. Astitha ◽  
J. Lelieveld
Keyword(s):  
Chemical Composition ◽  
Size Distribution ◽  
Atmospheric Chemistry ◽  
Mineral Dust ◽  
Dust Aerosol ◽  
Dust Particles ◽  
Metallic Ions ◽  
Aerosol Formation ◽  
Atmospheric Nitrate ◽  
Nitrate Aerosol

Abstract. This study provides an assessment of the chemical composition and global aerosol load of the major inorganic aerosol components and determines the effect of mineral dust on their formation, focusing on aerosol nitrate. To account for this effect, the mineral dust aerosol components (i.e., Ca2+, Mg2+, K+, Na+) and their emissions are added to the ECHAM5/MESSy Atmospheric Chemistry model (EMAC). Gas/aerosol partitioning is simulated using the ISORROPIA-II thermodynamic equilibrium model that considers the interactions of K+-Ca2+-Mg2+-NH4+-Na+-SO42−-NO3−-Cl−-H2O aerosol components. Emissions of mineral dust aerosol components (K+-Ca2+-Mg2+-Na+) are calculated online by taking into account the soil particle size distribution and chemical composition of different deserts worldwide. The presence of the metallic ions on the simulated suite of components can substantially affect the nitrate partitioning into the aerosol phase due to thermodynamic interactions. The updated model improved the nitrate predictions over remote areas and found that the fine aerosol nitrate concentration is highest over urban and industrialized areas (1–3 μg m−3), while coarse aerosol nitrate is highest close to deserts (1–4 μg m−3). The contribution of mineral dust components to nitrate formation is large in areas with high dust concentrations with impacts that can extend across southern Europe, western USA and northeastern China. The tropospheric burden of aerosol nitrate increases by 44% by considering the interactions of nitrate with mineral dust cations. The calculated global average nitrate aerosol concentration near the surface increases by 36% while the coarse and fine mode concentrations of nitrate increase by 53 and 21%, respectively. Sensitivity tests show that nitrate aerosol formation is most sensitive to the chemical composition of the emitted mineral dust, followed by the soil size distribution of dust particles, the magnitude of the mineral dust emissions, and the aerosol state assumption.

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