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| Titel |
Production and growth of new particles during two cruise campaigns in the marginal seas of China |
| VerfasserIn |
X. H. Liu, Y. J. Zhu, M. Zheng, H. W. Gao, X. H. Yao |
| 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. 15 ; Nr. 14, no. 15 (2014-08-11), S.7941-7951 |
| Datensatznummer |
250118934
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| Publikation (Nr.) |
 copernicus.org/acp-14-7941-2014.pdf |
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| Zusammenfassung |
| In this paper, we investigated production and growth of new particles in the
marine atmosphere during two cruise campaigns in China Seas using a Fast
Mobility Particle Sizer. Only eight new particle formation (NPF) events
(> 30 min) occurred on 5 days out of 31 sampling days, and the
subsequent growth of new particles was observed only in five events.
Apparent formation rates of new particles (in the range of 5.6–30 nm) varied
from 0.3 to 15.2 particles cm−3 s−1 in eight events, and growth
rates ranged from 2.5 to 10 nm h−1 in five NPF events. Modeling
results simulated by US EPA Community Multi-scale Air Quality Model (CMAQ)
showed that ammonium nitrate (NH4NO3) was newly formed in the
atmosphere over the corresponding sea zone during 2 out of 5 events, in
which new particles partially or mostly grew over 50 nm. However, in the
remaining three events, new particles cannot grow over 30 nm, and the
modeling results showed that no NH4NO3 was newly formed in the
corresponding marine atmosphere. Modeling results also showed that formation
of secondary organics occurred through all new particle growth periods.
Difference between the two types of new particle growth patterns suggested
that a combination of ammonium nitrate and organics newly formed likely
contributed to the growth of new particles from 30 nm to larger size.
However, the findings were obtained from the limited data, and the
simulations of CMAQ also suffered from several weaknesses such as only
having three size bins for different particles, lack of marine aerosol
precursors, etc. More future studies are thereby needed for confirmation. |
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