Journal article
Gas-Particle Partitioning of Nitric Acid Modulated by Alkaline Aerosol
Journal of atmospheric chemistry, Vol.40(1), pp.1-22
09/2001
DOI: 10.1023/A:1010657929716
Abstract
The role of alkaline mineral aerosol in controlling HNO3 partitioning between gas and aerosol phases is explored using a comprehensive, process oriented three-dimensional model. Simulation results for March 1994, a period from the PEM West B experiment, are presented. It is found that in the dust impacted regions of the boundary layer and free troposphere, more than 50% of HNO3 ispartitioned onto dust particles; while 10∼50% of HNO3 in the boundarylayer and 10∼ 30% of HNO3 in the free troposphere is partitionedonto sea-salt particles. This higher capacity of mineral dust to uptake HNO3 is due to the fact that carbonate in the dust particles is more volatile (thus easily replaced by nitrate) than chloride in the sea-salt particles. When this process of nitric acid partitioning onto alkaline particles is included in the analysis, model predicted HNO3-to-NOx ratios are much closer to observed valuesthat typically range between 1 and 9.
Details
- Title: Subtitle
- Gas-Particle Partitioning of Nitric Acid Modulated by Alkaline Aerosol
- Creators
- Chul Song - Department of Chemical and Biochemical Engineering, and Center for Global and Regional Environmental Research The University of Iowa Iowa City Iowa U.S.AGregory Carmichael - Department of Chemical and Biochemical Engineering, and Center for Global and Regional Environmental Research The University of Iowa Iowa City Iowa U.S.A
- Resource Type
- Journal article
- Publication Details
- Journal of atmospheric chemistry, Vol.40(1), pp.1-22
- Publisher
- Kluwer Academic Publishers; Dordrecht
- DOI
- 10.1023/A:1010657929716
- ISSN
- 0167-7764
- eISSN
- 1573-0662
- Language
- English
- Date published
- 09/2001
- Academic Unit
- Nursing; Civil and Environmental Engineering; Chemical and Biochemical Engineering
- Record Identifier
- 9984003423702771
Metrics
20 Record Views