Chemistry and Physics Faculty Articles

Title

Aerosol Chemistry, and Light-Scattering and Hygroscopicity Budgets during Outflow from East Asia

Document Type

Article

Publication Date

9-2003

Publication Title

Journal of Atmospheric Chemistry

Keywords

Aerosols, Light-Scattering, Hygroscopicity, Organics

ISSN

0167-7764

Volume

46

Issue/No.

1

First Page

55

Last Page

88

Abstract

During the ACE-Asia field campaign, 41 aerosol filter samples were obtained by airborne sampling over the ocean to the north, south and west of Japan, generally under conditions of outflow from the Asian continent. These samples were analyzed for their water-soluble chemical components, particularly organic species. Suites of inorganic anions, carbohydrates, organic acids and metallic elements were identified and quantified (21 distinct species). Simultaneously, measurements were made of the aerosol hygroscopicity and light scattering. A factor analysis performed on the compositional data identified several sources for the aerosols sampled during the field campaign. Regression of the light-scattering data onto tracers for each of these factors suggests that the aerosol light scattering could be largely attributed to three of these factors: anthropogenic emissions, biomass burning, and soil dust. Similarly, the aerosol hygroscopicity was largely consistent with an empirical mixing model based on past measurements of the hygroscopicity of these individual aerosol types. Limited size-resolved , aerosol composition measurements were also obtained and suggested different sources for various chemical species.

Comments

© Kluwer Academic Publishers 2003

DOI

10.1023/A:1024821409130

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Peer Reviewed

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