Skip to content
Journal article

Observational study of influence of aerosol hygroscopic growth on scattering coefficient over rural area near Beijing mega-city

Pan X, Yan P, Tang J, Ma J, Wang Z, Gbaguidi A, Sun Y ...see all

Atmospheric Chemistry and Physics, vol. 9, issue 19 (2009) pp. 7519-7530

  • 25

    Readers

    Mendeley users who have this article in their library.
  • 65

    Citations

    Citations of this article.
  • N/A

    Views

    ScienceDirect users who have downloaded this article.
Sign in to save reference

Abstract

We investigated aerosol hygroscopic growth property and its influence on
scattering coefficient using M9003 nephelometers in coupling with
humidity controlled inlet system at a rural site near Beijing mega-city
from 24 April to 15 May 2006. Inlet relative humidity was controlled in
an increasing range of 40%-90% while aerosol hygroscopic growth factor
of scattering coefficient, f (RH=80%) as ratio of scattering
coefficient at RH=80% to ``dry{''} scattering coefficient (RHvaried in a range of 1.07-2.35 during the measurement. Further analysis
indicated that under dust episode, measured f (RH=80%) is 1.2 +/- 0.02,
and estimated periodic mean value of f (RH=80%) was 1.31 +/- 0.03 under
clean periods; during urban pollution periods, the aerosol displayed
relative strong water absorbing properties with f (RH=80%) of about
1.57 +/- 0.02. An examination of chemical composition of daily filter
samples highlighted that aerosol hygroscopicity was generally depressed
with the increasing ratio of organic matter (OMC)/ammonium sulfate (AS)
in particle mass, similar with the results of many previous studies.
However, a special case with high value of f (RH=80%)=2.21 and high
OMC/AS ratio was also observed, this exception reflected
physico-chemical particularities of organic matter and its complex
interaction with other compounds during this episode.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • X. L. Pan

  • P. Yan

  • J. Tang

  • J. Z. Ma

  • Z. F. Wang

  • a. Gbaguidi

Cite this document

Choose a citation style from the tabs below