 |
| Titel |
Natural new particle formation at the coastal Antarctic site Neumayer |
| VerfasserIn |
R. Weller, K. Schmidt, K. Teinilä, R. Hillamo |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 19 ; Nr. 15, no. 19 (2015-10-15), S.11399-11410 |
| Datensatznummer |
250120096
|
| Publikation (Nr.) |
 copernicus.org/acp-15-11399-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| We measured condensation particle (CP) concentrations and particle size
distributions at the coastal Antarctic station Neumayer (70°39´ S,
8°15´ W) during two summer campaigns (from 20 January to 26 March
2012 and 1 February to 30 April 2014) and during the polar night between 12 August and 27 September 2014 in the particle diameter (Dp) range from
2.94 to 60.4 nm (2012) and from 6.26 to 212.9 nm (2014). During both
summer campaigns we identified all in all 44 new particle formation (NPF)
events. From 10 NPF events, particle growth rates could be determined to be
around 0.90 ± 0.46 nm h−1 (mean ± SD; range: 0.4–1.9 nm h−1). With the exception of one case,
particle growth was generally restricted to the nucleation mode (Dp < 25 nm) and the duration of NPF events was typically around
6.0 ± 1.5 h (mean ± SD; range: 4–9 h). Thus, in the
surrounding area of Neumayer, particles did not grow up to sizes required
for acting as cloud condensation nuclei. NPF during summer usually occurred
in the afternoon in coherence with local photochemistry. During winter, two
NPF events could be detected, though showing no ascertainable particle
growth. A simple estimation indicated that apart from sulfuric acid, the
derived growth rates required other low volatile precursor vapours. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|