Aerosol Chemistry, and Light-Scattering and Hygroscopicity Budgets during Outflow from East Asia
Loading...
Authors
Gao, Song
Hegg, Dean A.
Jonsson, Haflidi
Subjects
aerosols
light-scattering
hygroscopicity
organics
light-scattering
hygroscopicity
organics
Advisors
Date of Issue
2003
Date
Publisher
Language
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 sizeresolved, aerosol composition measurements were also obtained and suggested different sources for
various chemical species.
Type
Article
Description
Series/Report No
Department
Meteorology
Organization
Identifiers
NPS Report Number
Sponsors
Support for this study was provided by ONR grant N00014–97–1-0132 and NSF grant ATM-9908411.
Funder
Format
Citation
Journal of Atmospheric Chemistry, Vol. 46, pp. 55-88, 2003
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.