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| Titel |
Parameterization of the nitric acid effect on CCN activation |
| VerfasserIn |
S. Romakkaniemi, H. Kokkola, A. Laaksonen |
| 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 ; 5, no. 4 ; Nr. 5, no. 4 (2005-03-16), S.879-885 |
| Datensatznummer |
250002657
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| Publikation (Nr.) |
 copernicus.org/acp-5-879-2005.pdf |
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| Zusammenfassung |
| In this paper we present a parameterization of the nitric acid effect on
cloud droplet formation. The new parameterization is intended to be
used in large scale models in order to obtain regional and global estimates
of the effect of nitric acid on cloud drop concentrations and the
radiative balance. The parameterization is based on numerical air
parcel model simulations and can be applied for unimodal and bimodal
lognormal aerosol particle size distributions in a large variety of
different conditions. In addition to the aerosol particle distribution
and gas-phase HNO3 concentration, the parameterization requires
temperature, total pressure, updraft velocity, and the number
concentration of cloud droplets formed at zero nitric acid
concentration, as input parameters. The parameterization is also
suitable for describing the effect of hydrochloric acid on the cloud
drop concentrations, and in practice, the HNO3 and HCl
concentrations can be summed up to yield the total effect. The
comparison between the parameterization and the results from numerical
air parcel model simulations show good consistency. |
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