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

Junninen, Heikki ; Ahonen, Lauri ; Bianchi, Federico ; Quéléver, Lauriane ; Schallhart, Simon ; Dada, Lubna ; Manninen, Hanna Elina ; Leino, Katri ; Lampilahti, Janne and Buenrostro Mazon, Stephany , et al. (2022) In Communications Earth and Environment 3(1).
Abstract

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... (More)

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.

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@article{bec9cc09-15b3-4776-88eb-69f9af1a6250,
  abstract     = {{<p>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.</p>}},
  author       = {{Junninen, Heikki and Ahonen, Lauri and Bianchi, Federico and Quéléver, Lauriane and Schallhart, Simon and Dada, Lubna and Manninen, Hanna Elina and Leino, Katri and Lampilahti, Janne and Buenrostro Mazon, Stephany and Rantala, Pekka and Räty, Mari and Kontkanen, Jenni and Negri, Sara and Aliaga, Diego and Garmash, Olga and Alekseychik, Pavel and Lipp, Helina and Tamme, Kalju and Levula, Janne and Sipilä, Mikko and Ehn, Mikael and Worsnop, Douglas and Zilitinkevich, Sergej and Mammarella, Ivan and Rinne, Janne and Vesala, Timo and Petäjä, Tuukka and Kerminen, Veli Matti and Kulmala, Markku}},
  issn         = {{2662-4435}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  series       = {{Communications Earth and Environment}},
  title        = {{Terpene emissions from boreal wetlands can initiate stronger atmospheric new particle formation than boreal forests}},
  url          = {{http://dx.doi.org/10.1038/s43247-022-00406-9}},
  doi          = {{10.1038/s43247-022-00406-9}},
  volume       = {{3}},
  year         = {{2022}},
}