Die u:cris Detailansicht:
Comparison of particulate number concentrations in three Central European capital cities
- Autor(en)
- Tibor Borsós, Daniela Rimnácová, Vladimir Ždímal, Jiri Smolik, Zdenek Wagner, Tamás Weidinger, Julia Burkart, Gerhard Steiner, Georg Reischl, Regina Hitzenberger, Jaroslav Schwarz, Imre Salma
- Abstrakt
Number size distributions of atmospheric aerosol particles in the
mobility diameter range from 10 to 1000 nm were determined in Budapest,
Prague and Vienna for a one-year-long period. Particle number
concentrations in various size fractions, their diurnal and seasonal
variations, mean size distributions and some properties of new particle
formation events were derived and compared. Yearly median particle
number concentrations for Budapest, Prague and Vienna were 10.6 × 103, 7.3 × 103 and 8.0 × 103 cm− 3.
Differences were linked to the different pollution levels of the
cities, and to diverse measurement environments and local conditions.
Mean contributions of ultrafine particles (particles with a mobility
diameter < 100 nm) to the total number concentration were 80%, 84%
and 74% for Budapest, Prague and Vienna, thus these particles represent
an overwhelming share of all particles in each city. Seasonal variation
of particle number concentrations was not obvious. Diurnal variations of
particles with a diameter between 100 and 1000 nm (N100–1000)
exhibited similar shape for the cities, which was related to the
time-activity pattern of inhabitants and regional influences. The
structure of the diurnal variation for ultrafine particles was also
similar. It contained a huge morning peak in each city which was
explained by emissions from vehicular traffic. The second peak was
shifted from afternoon rush hours to late evenings as a result of the
daily cycling in meteorological parameters. The character of the
measurement site also influenced the diurnal variation. Diurnal
variation of the mean ratio of ultrafine particles to N100–1000
clearly revealed the presence and importance of new particle formation
and subsequent growth in urban environments. Nucleation frequencies in
Budapest and Prague were 27% and 23%, respectively on a yearly time
scale. They showed a minimum in winter for both places, while the
largest nucleation activity was observed in spring for Budapest, and in
summer for Prague.
- Organisation(en)
- Aerosolphysik und Umweltphysik
- Externe Organisation(en)
- Czech Academy of Sciences, Eötvös Loránd University Budapest
- Journal
- Science of the Total Environment
- Band
- 433
- Seiten
- 418-426
- Anzahl der Seiten
- 9
- ISSN
- 0048-9697
- DOI
- https://doi.org/10.1016/j.scitotenv.2012.06.052
- Publikationsdatum
- 2012
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105904 Umweltforschung
- Sustainable Development Goals
- SDG 11 – Nachhaltige Städte und Gemeinden
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/90b007c0-292b-461e-aa37-264fc080b10c