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| Titel |
Artificial primary marine aerosol production: a laboratory study with varying water temperature, salinity, and succinic acid concentration |
| VerfasserIn |
J. Zábori, M. Matisāns, R. Krejci, E. D. Nilsson, J. Ström |
| 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 ; 12, no. 22 ; Nr. 12, no. 22 (2012-11-16), S.10709-10724 |
| Datensatznummer |
250011593
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| Publikation (Nr.) |
 copernicus.org/acp-12-10709-2012.pdf |
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| Zusammenfassung |
| Primary marine aerosols are an important component of the climate system,
especially in the remote marine environment. With diminishing sea-ice cover,
better understanding of the role of sea spray aerosol on climate in the polar
regions is required. As for Arctic Ocean water, laboratory experiments with
NaCl water confirm that a few degrees change in the water temperature
(Tw) gives a large change in the number of primary particles.
Small particles with a dry diameter between 0.01 μm and
0.25 μm dominate the aerosol number density, but their relative
dominance decreases with increasing water temperature from 0 °C
where they represent 85–90% of the total aerosol number to
10 °C, where they represent 60–70% of the total aerosol number.
This effect is most likely related to a change in physical properties and not
to modification of sea water chemistry. A change of salinity between
15 g kg−1 and 35 g kg−1 did not influence the shape of a
particle number size distribution. Although the magnitude of the size
distribution for a water temperature change between 0 °C and
16 °C changed, the shape did not. An experiment where succinic acid
was added to a NaCl water solution showed, that the number concentration of
particles with 0.010 μm < Dp < 4.5 μm
decreased on average by 10% when the succinic acid concentration in NaCl
water at a water temperature of 0 °C was increased from
0 μmol L−1 to 94 μmol L−1. A shift to larger
sizes in the particle number size distribution is observed from pure NaCl
water to Arctic Ocean water. This is likely a consequence of organics and
different inorganic salts present in Arctic Ocean water in addition to the
NaCl. |
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