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Title:Equal abundance of summertime natural and wintertime anthropogenic Arctic organic aerosols
Authors:Moschos, Vaios (Author)
Dzepina, Katja (Author)
Bhattu, Deepika (Author)
Lamkaddam, Houssni (Author)
Casotto, Roberto (Author)
Daellenbach, Kaspar R. (Author)
Canonaco, Francesco (Author)
Rai, Pragati (Author)
Aas, Wenche (Author)
Becagli, Silvia (Author)
Calzolai, Giulia (Author)
Eleftheriadis, Konstantinos (Author)
Moffett, Claire E. (Author)
Schnelle-Kreis, Jürgen (Author)
Severi, Mirko (Author)
Sharma, Sangeeta (Author)
Skov, Henrik (Author)
Vestenius, Mika (Author)
Zhang, Wendy (Author)
Hakola, Hannele (Author)
Hellén, Heidi (Author)
Huang, Lin (Author)
Jaffrezo, Jean-Luc (Author)
Massling, Andreas (Author)
Nøjgaard, Jakob K. (Author)
Petäjä, Tuuka (Author)
Popovicheva, Olga (Author)
Sheesley, Rebecca J. (Author)
Traversi, Rita (Author)
Yttri, Karl Espen (Author)
Schmale, Julia (Author)
Prévôt, André S. H. (Author)
Baltensperger, Urs (Author)
El Haddad, Imad (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Aerosols play an important yet uncertain role in modulating the radiation balance of the sensitive Arctic atmosphere. Organic aerosol is one of the most abundant, yet least understood, fractions of the Arctic aerosol mass. Here we use data from eight observatories that represent the entire Arctic to reveal the annual cycles in anthropogenic and biogenic sources of organic aerosol. We show that during winter, the organic aerosol in the Arctic is dominated by anthropogenic emissions, mainly from Eurasia, which consist of both direct combustion emissions and long-range transported, aged pollution. In summer, the decreasing anthropogenic pollution is replaced by natural emissions. These include marine secondary, biogenic secondary and primary biological emissions, which have the potential to be important to Arctic climate by modifying the cloud condensation nuclei properties and acting as ice-nucleating particles. Their source strength or atmospheric processing is sensitive to nutrient availability, solar radiation, temperature and snow cover. Our results provide a comprehensive understanding of the current pan-Arctic organic aerosol, which can be used to support modelling efforts that aim to quantify the climate impacts of emissions in this sensitive region.
Keywords:Arctic, Organic aerosols, Emission sources, Climate change
Year of publishing:2022
Number of pages:10
Numbering:February 2022
COBISS_ID:99270915  Link is opened in a new window
DOI: Link is opened in a new window
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
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Title:Nature Geosciences
Shortened title:Nat. Geosci.
Year of publishing:2022