Contribution of new particle formation to the total aerosol concentration at the high‐altitude site Jungfraujoch (3580 m asl, Switzerland)
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Authors
Tröstl, Jasmin
Herrmann, Erik
Frege, Carla
Bianchi, Federico
Molteni, Ugo
Bukowiecki, Nicolas
Hoyle, Christopher R.
Dommen, Josef
Author (Corporation)
Publication date
2016
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Type
01A - Journal article
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Parent work
Journal of Geophysical Research: Atmospheres
Special issue
DOI of the original publication
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Series
Series number
Volume
121
Issue / Number
19
Pages / Duration
11692-11711
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Publisher / Publishing institution
Wiley
Place of publication / Event location
Weinheim
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Abstract
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 12 month campaign of NPF observations at the high‐altitude site Jungfraujoch (JFJ, 3580 m above 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 (90 nm) within observable time scales (maximum 48 h). 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.
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Subject (DDC)
550 - Geowissenschaften
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ISBN
ISSN
2169-897X
2169-8996
2169-8996
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Green
License
Citation
TRÖSTL, Jasmin, Erik HERRMANN, Carla FREGE, Federico BIANCHI, Ugo MOLTENI, Nicolas BUKOWIECKI, Christopher R. HOYLE, Martin STEINBACHER, Ernest WEINGARTNER, Josef DOMMEN, Martin GYSEL und Urs BALTENSPERGER, 2016. Contribution of new particle formation to the total aerosol concentration at the high‐altitude site Jungfraujoch (3580 m asl, Switzerland). Journal of Geophysical Research: Atmospheres. 2016. Bd. 121, Nr. 19, S. 11692–11711. DOI 10.1002/2015JD024637. Verfügbar unter: https://doi.org/10.26041/fhnw-7755