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| Titel |
An alternative method for estimating hygroscopic growth factor of aerosol light-scattering coefficient: a case study in an urban area of Guangzhou, South China |
| VerfasserIn |
Z. J. Lin, Z. S. Zhang, L. Zhang, J. Tao, R. J. Zhang, J. J. Cao, S. J. Fan, Y. H. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 14 ; Nr. 14, no. 14 (2014-07-30), S.7631-7644 |
| Datensatznummer |
250118912
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| Publikation (Nr.) |
 copernicus.org/acp-14-7631-2014.pdf |
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| Zusammenfassung |
| A method was developed to estimate hygroscopic growth factor (f(RH)) of
aerosol light-scattering coefficient (bsp), making use of the
measured size- and chemically resolved aerosol samples. In this method,
chemical composition of the measured aerosol samples were first reconstructed
using the equilibrium model ISORROPIA II. The reconstructed chemical
composition, which varies with relative humidity (RH), was then employed to
calculate bsp and hygroscopic growth factor of
bsp (fsp(RH)) using the Mie model. Furthermore, the
calculated fsp(RH) was fitted with an empirical curve.
To evaluate the applicability of fsp(RH), the curve of
fsp(RH) was used to
correct the long-term records of the measured bsp from the
values under comparative dry conditions to the ones under ambient RH
conditions. Compared with the original bsp data, the
fsp(RH)-corrected bsp had a higher linear
correlation with, and a smaller discrepancy from, the bsp derived
directly from visibility and absorption measurements. The
fsp(RH) determined here was further compared with that
reported in previous studies. The method described in this manuscript
provides an alternative approach to derive credible fsp(RH)
with high accuracy and has many potential applications in aerosol-related
research. |
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