Sulfate alters aerosol absorption properties in East Asian outflow

Saehee Lim, Meehye Lee, Sang Woo Kim, Paolo Laj

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Black carbon (BC) and brown carbon (BrC) aerosols that are released from the combustion of fossil fuels and biomass are of great concern because of their light-absorbing ability and great abundance associated with various anthropogenic sources, particularly in East Asia. However, the optical properties of ambient aerosols are dependent on the mixing state and the chemical composition of absorbing and non-absorbing aerosols. Here we examined how, in East Asian outflows, the parameters of the aerosol optical properties can be altered seasonally in conjunction with the mixing state and the chemical composition of aerosols, using 3-year aerosol measurements. Our findings highlight the important role played by sulfate in East Asia during the warm season in both enhancing single scattering albedo (SSA) and altering the absorption properties of aerosols - enhancing mass absorption cross section of BC (MACBC) and reducing MAC of BrC (MACBrC,370). Therefore we suggest that in global radiative forcing models, particular attention should be paid to the consideration of the accurate treatment of the SO2 emission changes in the coming years in this region that will result from China's air quality policy.

Original languageEnglish
Article number5172
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1

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outflow
aerosol
sulfate
black carbon
optical property
chemical composition
radiative forcing
anthropogenic source
fossil fuel
albedo
air quality
cross section
combustion
scattering
biomass
brown carbon
Asia

ASJC Scopus subject areas

  • General

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Sulfate alters aerosol absorption properties in East Asian outflow. / Lim, Saehee; Lee, Meehye; Kim, Sang Woo; Laj, Paolo.

In: Scientific Reports, Vol. 8, No. 1, 5172, 01.12.2018.

Research output: Contribution to journalArticle

Lim, Saehee ; Lee, Meehye ; Kim, Sang Woo ; Laj, Paolo. / Sulfate alters aerosol absorption properties in East Asian outflow. In: Scientific Reports. 2018 ; Vol. 8, No. 1.
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