Terpene emissions from boreal wetlands can initiate stronger atmospheric new particle formation than boreal forests

Aerosols and their interaction with clouds constitute the largest uncertainty in estimating the radiative forcing affecting the climate system. Secondary aerosol formation is responsible for a large fraction of the cloud condensation nuclei in the global atmosphere. Wetlands are important to the bud...

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Bibliographic Details
Published in:Communications earth & environment 2022-12, Vol.3 (1), p.1-9, Article 93
Main Authors: Junninen, Heikki, Ahonen, Lauri, Bianchi, Federico, Quéléver, Lauriane, Schallhart, Simon, Dada, Lubna, Manninen, Hanna Elina, Leino, Katri, Lampilahti, Janne, Buenrostro Mazon, Stephany, Rantala, Pekka, Räty, Mari, Kontkanen, Jenni, Negri, Sara, Aliaga, Diego, Garmash, Olga, Alekseychik, Pavel, Lipp, Helina, Tamme, Kalju, Levula, Janne, Sipilä, Mikko, Ehn, Mikael, Worsnop, Douglas, Zilitinkevich, Sergej, Mammarella, Ivan, Rinne, Janne, Vesala, Timo, Petäjä, Tuukka, Kerminen, Veli-Matti, Kulmala, Markku
Format: Article
Language:English
Subjects:
Aerosols
Agricultural Science, Forestry and Fisheries
Agricultural Sciences
Boreal forests
Carbon dioxide
Climate change
Clouds
Condensation nuclei
Cooling effects
Emission analysis
Emissions
Forest Science
Forests
Lantbruksvetenskap och veterinärmedicin
Lantbruksvetenskap, skogsbruk och fiske
Methane
Organic compounds
Permafrost
Radiative forcing
Skogsvetenskap
Taiga
Terpenes
VOCs
Volatile organic compounds
Wetlands
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Summary:Aerosols and their interaction with clouds constitute the largest uncertainty in estimating the radiative forcing affecting the climate system. Secondary aerosol formation is responsible for a large fraction of the cloud condensation nuclei in the global atmosphere. Wetlands are important to the budgets of methane and carbon dioxide, but the potential role of wetlands in aerosol formation has not been investigated. Here we use direct atmospheric sampling at the Siikaneva wetland in Finland to investigate the emission of methane and volatile organic compounds, and subsequently formed atmospheric clusters and aerosols. We find that terpenes initiate stronger atmospheric new particle formation than is typically observed over boreal forests and that, in addition to large emissions of methane which cause a warming effect, wetlands also have a cooling effect through emissions of these terpenes. We suggest that new wetlands produced by melting permafrost need to be taken into consideration as sources of secondary aerosol particles when estimating the role of increasing wetland extent in future climate change.
ISSN:2662-4435
2662-4435
DOI:10.1038/s43247-022-00406-9