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| Titel |
The influence of nitric acid on the cloud processing of aerosol particles |
| VerfasserIn |
S. Romakkaniemi, H. Kokkola, K. E. J. Lehtinen, 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 ; 6, no. 6 ; Nr. 6, no. 6 (2006-05-19), S.1627-1634 |
| Datensatznummer |
250003827
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| Publikation (Nr.) |
 copernicus.org/acp-6-1627-2006.pdf |
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| Zusammenfassung |
| In this paper we present simulations of the effect of nitric acid
(HNO3) on cloud processing of aerosol particles. Sulfuric acid
(H2SO4) production and incloud coagulation are both affected
by condensed nitric acid as nitric acid increases the number of cloud
droplets, which will lead to smaller mean size and higher total
surface area of droplets. As a result of increased cloud droplet
number concentration (CDNC), the incloud coagulation rate is enhanced
by a factor of 1–1.3, so that the number of interstitial particles
reduces faster. In addition, sulfuric acid production occurs in
smaller particles and so the cloud processed aerosol size distribution
is dependent on the HNO3 concentration. This affects both radiative
properties of aerosol particles and the formation of cloud droplets
during a sequence of cloud formation-evaporation events. It is shown
that although the condensation of HNO3 increases the number of
cloud droplets during the single updraft, it is possible that presence of
HNO3 can actually decrease the cloud droplet number
concentration after several cloud cycles when also H2SO4
production is taken into account. |
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