Work

Toward a general parameterization of N 2 O 5 reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride

Year: 2009

Type: article

Abstract: . The heterogeneous reaction of N2O5 on mixed organic-inorganic aerosol particles was investigated using an entrained aerosol flow tube coupled to a custom-built chemical ionization mass spectrometer. Laboratory results on aqueous particles confirm a strong dependence of the reactive uptake coefficient (γ) on particle liquid water, for particle water concentrations below 15 M, and the molar ratio of particle water to nitrate. Measurements of γ (N2O5) on mixed chloride-nitrate particles indicate that the presence of trace chloride can negate the suppression of γ(N2O5) at high nitrate loadings with implications for polluted coastal regions. These results are used to construct a new parameterization for γ (N2O5), that when coupled to an aerosol thermodynamics model, can be used within regional and/or global chemical transport models.

Source: Atmospheric chemistry and physics

DOI: 10.5194/acp-9-8351-2009

Authors: T. H. Bertram, J. A. Thornton

Institutions: University of Washington, University of California San Diego

Language: English

Topic: Atmospheric chemistry and aerosols

Subfield: Atmospheric Science

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,725