Aerosol decadal trends – Part 2. In-situ aerosol particle number concentrations at GAW and ACTRIS stations
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Authors
Asmi, Ari
Collaud Coen, Martine
Ogren, John A.
Andrews, Elisabeth
Sheridan, Patrick
Jefferson, Anne
Baltensperger, Urs
Bukowiecki, Nicolas
Lihavainen, Heikki
Author (Corporation)
Publication date
2013
Typ of student thesis
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Collections
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Atmospheric Chemistry and Physics
Special issue
DOI of the original publication
Link
Series
Series number
Volume
13
Issue / Number
2
Pages / Duration
895–916
Patent number
Publisher / Publishing institution
Copernicus
Place of publication / Event location
Göttingen
Edition
Version
Programming language
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Abstract
We have analysed the trends of total aerosol particle number concentrations (N) measured at long-term measurement stations involved either in the Global Atmosphere Watch (GAW) and/or EU infrastructure project ACTRIS. The sites are located in Europe, North America, Antarctica, and on Pacific Ocean islands. The majority of the sites showed clear decreasing trends both in the full-length time series, and in the intra-site comparison period of 2001–2010, especially during the winter months. Several potential driving processes for the observed trends were studied, and even though there are some similarities between N trends and air temperature changes, the most likely cause of many northern hemisphere trends was found to be decreases in the anthropogenic emissions of primary particles, SO2 or some co-emitted species. We could not find a consistent agreement between the trends of N and particle optical properties in the few stations with long time series of all of these properties. The trends of N and the proxies for cloud condensation nuclei (CCN) were generally consistent in the few European stations where the measurements were available. This work provides a useful comparison analysis for modelling studies of trends in aerosol number concentrations.
Keywords
Subject (DDC)
550 - Geowissenschaften
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ISBN
ISSN
1680-7324
1680-7316
1680-7316
Language
English
Created during FHNW affiliation
No
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
License
Citation
ASMI, Ari, Martine COLLAUD COEN, John A. OGREN, Elisabeth ANDREWS, Patrick SHERIDAN, Anne JEFFERSON, Ernest WEINGARTNER, Urs BALTENSPERGER, Nicolas BUKOWIECKI, Heikki LIHAVAINEN, Niku KIVEKÄS, Eija ASMI, Pasi Pekka AALTO, Markku KULMALA, Alfred WIEDENSOHLER, Wolfram BIRMILI, Amar HAMED, Colin O’DOWD, Stephen G. JENNINGS, Rolf WELLER, Harald FLENTJE, Ann Mari FJAERAA, Markus FIEBIG, Cathrine Lund MYHRE, Anna Gannet HALLAR, Erik SWIETLICKI, Adam KRISTENSSON und Paolo LAJ, 2013. Aerosol decadal trends – Part 2. In-situ aerosol particle number concentrations at GAW and ACTRIS stations. Atmospheric Chemistry and Physics. 2013. Bd. 13, Nr. 2, S. 895–916. DOI 10.5194/acp-13-895-2013. Verfügbar unter: https://doi.org/10.26041/fhnw-8164