Contribution of new particle formation to the total aerosol concentration at the high-altitude site Jungfraujoch (3580masl, Switzerland)

Trostl, Jasmin and Herrmann, Erik and Frege, Carla and Bianchi, Federico and Molteni, Ugo and Bukowiecki, Nicolas and Hoyle, Christopher R. and Steinbacher, Martin and Weingartner, Ernest and Dommen, Josef and Gysel, Martin and Baltensperger, Urs. (2016) Contribution of new particle formation to the total aerosol concentration at the high-altitude site Jungfraujoch (3580masl, Switzerland). JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 121 (19). pp. 11692-11711.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/73987/

Downloads: Statistics Overview


Previous modeling studies hypothesized that a large fraction of cloud condensation nuclei (CCN) is attributed to new particle formation (NPF) in the free troposphere. Despite the potential importance of this process, only few long-term observations have been performed to date. Here we present the results of a 12month campaign of NPF observations at the high-altitude site Jungfraujoch (JFJ, 3580mabove sea level (asl)). Our results show that NPF significantly adds to the total aerosol concentration at the JFJ and only occurs via previous precursor entrainment from the planetary boundary layer (PBL). Freshly nucleated particles do not directly grow to CCN size (90nm) within observable time scales (maximum 48h). The contribution of NPF to the CCN concentration is low within this time frame compared to other sources, such as PBL entrainment of larger particles. A multistep growth mechanism is proposed which allows previously formed Aitken mode particles to add to the CCN concentration. A parametrization is derived to explain formation rates at the JFJ, showing that precursor concentration, PBL influence, and global radiation are the key factors controlling new particle formation at the site.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Atmospheric Sciences (Kalberer)
UniBasel Contributors:Bukowiecki, Nicolas
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:16 May 2020 14:11
Deposited On:16 May 2020 14:11

Repository Staff Only: item control page