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| Titel |
A study of aerosol liquid water content based on hygroscopicity measurements at high relative humidity in the North China Plain |
| VerfasserIn |
Y. X. Bian, C. S. Zhao, N. Ma, J. Chen, W. Y. Xu |
| 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. 12 ; Nr. 14, no. 12 (2014-06-26), S.6417-6426 |
| Datensatznummer |
250118841
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| Publikation (Nr.) |
 copernicus.org/acp-14-6417-2014.pdf |
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| Zusammenfassung |
| Water can be a major component of aerosol particles, also serving as a
medium for aqueous-phase reactions. In this study, a novel method is
presented to calculate the aerosol liquid water content at high relative
humidity based on measurements of aerosol hygroscopic growth factor,
particle number size distribution and relative humidity in the Haze in China
(HaChi) summer field campaign (July–August 2009) in the North China Plain.
The aerosol liquid water content calculated using this method agreed well
with that calculated using a thermodynamic equilibrium model (ISORROPIA II)
at high relative humidity (>60%) with a correlation
coefficient of 0.96. At low relative humidity (<60%), an
underestimation was found in the calculated aerosol liquid water content by
the thermodynamic equilibrium model. This discrepancy mainly resulted from
the ISORROPIA II model, which only considered limited aerosol chemical
compositions. The mean and maximum values of aerosol liquid water content
during the HaChi campaign reached 1.69 × 10−4 g m−3
and 9.71 × 10−4 g m−3, respectively. A
distinct diurnal variation of the aerosol liquid water content was found,
with lower values during daytime and higher ones at night. The aerosol
liquid water content depended strongly on the relative humidity. The aerosol
liquid water content in the accumulation mode dominated the total aerosol
liquid water content. |
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