 |
| Titel |
Atmospheric sub-3 nm particles at high altitudes |
| VerfasserIn |
S. Mirme, A. Mirme, A. Minikin, A. Petzold, U. Hõrrak, V.-M. Kerminen, M. Kulmala  |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 2 ; Nr. 10, no. 2 (2010-01-19), S.437-451 |
| Datensatznummer |
250007954
|
| Publikation (Nr.) |
 copernicus.org/acp-10-437-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Formation of new atmospheric aerosol particles is known to occur almost all
over the world and the importance of these particles to climate and air
quality has been recognized. Recently, it was found that atmospheric aerosol
particle formation begins at the diameter of around 1.5–2.0 nm and a pool
of sub-3 nm atmospheric particles – consisting of both charged and
uncharged ones – was observed at the ground level. Here, we report on the
first airborne observations of the pool of sub-3 nm neutral atmospheric
particles. Between 2 and 3 nm, their concentration is roughly two orders of
magnitude larger than that of the ion clusters, depending slightly on the
altitude. Our findings indicate that new particle formation takes place
throughout the tropospheric column up to the tropopause. Particles
were found to be formed via neutral pathways in the boundary layer, and there
was no sign of an increasing role by ion-induced nucleation toward the upper
troposphere. Clouds, while acting as a source of sub-10 nm ions, did not
perturb the overall budget of atmospheric clusters or particles. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|