Aerosol chemistry, and light-scattering and hygroscopicity budgets during outflow from East Asia

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Gao, S; Hegg, DA; Jonsson, H

Published Date

  • September 1, 2003

Published In

Volume / Issue

  • 46 / 1

Start / End Page

  • 55 - 88

International Standard Serial Number (ISSN)

  • 0167-7764

Digital Object Identifier (DOI)

  • 10.1023/A:1024821409130

Citation Source

  • Scopus