ground-based characterization of aerosol spectral optical properties of haze and asian dust episodes under asian continental outflow during winter 2014
Clicks: 162
ID: 178106
2017
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Emerging Content
30.0
/100
162 views
17 readers
AI Quality Assessment
Not analyzed
Readership in this journal
EmergingRanked #355 of 850 articles by views in Journal of agricultural and food chemistry
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 850 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
Long-range transported (LRT) haze can affect the regional radiation budget
and the air quality in areas downwind of the Asian continental outflow.
Because in situ observations of spectral aerosol optical properties of the LRT haze
are rare, an intensive characterization of aerosol optical properties is
needed. This study characterized the spectral optical properties of the LRT
haze and Asian dust originating from the Asian continent. Integrated
chemical and optical measurements of aerosol particles were carried out in a
downwind area of the Asian continental outflow (Daejeon, South Korea) during
winter 2014. High concentrations of PM10 (particulate matter with a
diameter ≤ 10 µm) and light scattering coefficients at 550 nm,
σs, 550, were observed during a long-range transport (LRT) haze
episode (PM10 = 163.9 ± 25.0 µg m−3; σs, 550 = 503.4 ± 60.5 Mm−1) and Asian dust episode
(PM10 = 211.3 ± 57.5 µg m−3; σs, 550 = 560.9 ± 151 Mm−1). During the LRT haze episode, no significant
change in the relative contribution of PM2. 5 (particulate matter with a
diameter ≤ 2.5 µm) chemical components was observed as particles
accumulated under stagnant atmospheric conditions (13–17 January 2014),
suggesting that the increase in PM2. 5 mass concentration was caused
mainly by the accumulation of LRT pollutants. On the other hand, a gradual
decrease in Ångström exponent (Å) and a gradual increase in single
scattering albedo (ω) and mass scattering efficiency (MSE) were
observed during the stagnant period, possibly due to an increase in particle
size. These results imply that a change in particle size rather than
chemical composition during the stagnant period is the dominant factor
affecting the aerosol optical properties. During the Asian dust episode, a
low PM2. 5 ∕ PM10 ratio and Å(450∕700) were observed with average
values of 0.59 ± 0.06 and 1.08 ± 0.14, respectively, which were
higher than those during the LRT haze episode (0.75 ± 0.06 and 1.39 ± 0.05, respectively), indicating that PM2. 5 ∕ PM10 mass
ratios and Å(450∕700) can be used as tracers to distinguish aged LRT haze and
Asian dust under the Asian continental outflow.
| Reference Key |
jung2017atmosphericground-based
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | ;J. Jung;J. Yu;Y. Lyu;M. Lee;T. Hwang;S. Lee |
| Journal | Journal of agricultural and food chemistry |
| Year | 2017 |
| DOI |
10.5194/acp-17-5297-2017
|
| URL | |
| Keywords |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.