 |
| Titel |
Spatial extension of nucleating air masses in the Carpathian Basin |
| VerfasserIn |
Z. Nemeth, I. Salma |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 16 ; Nr. 14, no. 16 (2014-08-27), S.8841-8848 |
| Datensatznummer |
250118986
|
| Publikation (Nr.) |
 copernicus.org/acp-14-8841-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Particle number size distributions were measured by differential mobility
particle sizer in the diameter range of 6–1000 nm in the near-city
background and city centre of Budapest continuously for two years. The city
is situated in the middle part of the Carpathian Basin, which is a
topographically discrete unit in the southeastern part of central Europe. Yearly mean
nucleation frequencies and uncertainties for the near-city background and
city centre were (28 + 6/−4) % and (27 + 9/−4) %, respectively.
The total numbers of days with continuous and uninterrupted growth process were
43 and 31, respectively. These events and their properties were utilised to
investigate the spatial scale of the nucleation in the basin, and whether there
are any specific trajectories for the nucleating air masses. Local wind
speed and direction data indicated that there seem to be differences between
the nucleation and growth intervals and non-nucleation days. For further
analysis, backward trajectories were generated by a simple air parcel
trajectory model. Start and end time parameters of the nucleation and an end
time parameter of the particle growth were derived by a standardised
procedure based on examining the channel contents of the contour plots.
These parameters were used to specify a segment on each backward trajectory
that is associated with the nucleating air mass. The results indicated that
regional nucleation happened in the continental boundary layer mostly in the
Carpathian Basin but that the most distant trajectories originated outside of the
basin. The nucleating air masses were predominantly associated with NW and
SE geographical sectors, and some of them were also related to larger
forested territories. The results also emphasised indirectly that the
regional new particle formation and growth phenomena observable at the fixed
location often expand to the bulk of the Carpathian Basin. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|