Articles | Volume 17, issue 22
https://doi.org/10.5194/acp-17-13819-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-17-13819-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
The role of highly oxygenated molecules (HOMs) in determining the composition of ambient ions in the boreal forest
Federico Bianchi
CORRESPONDING AUTHOR
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Invited contribution by Federico Bianchi, recipient of the EGU Arne Richter Award for Outstanding Early Career Scientists 2017.
Olga Garmash
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Xucheng He
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Siddharth Iyer
Department of Chemistry, University of Helsinki, 00014 Helsinki, Finland
Ida Rosendahl
Arctic Research Centre, Aarhus University, 8000 Aarhus, Denmark
Zhengning Xu
Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, 210023 Nanjing, China
Matti P. Rissanen
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Matthieu Riva
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Risto Taipale
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Nina Sarnela
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Tuukka Petäjä
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Douglas R. Worsnop
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Aerodyne Research, Inc., Billerica, MA 01821, USA
Markku Kulmala
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Mikael Ehn
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Heikki Junninen
Department of Physics, University of Helsinki, 00014 Helsinki, Finland
Institute of Physics, University of Tartu, 50090 Tartu, Estonia
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Latest update: 06 Dec 2025
Short summary
Naturally charged highly oxidised molecules (HOMs) were characterized using advanced mass spectrometers. Two different classes of compounds, clustered with the nitrate and bisulfate ions, were identified: HOMs containing only carbon, hydrogen and oxygen and nitrogen-containing HOMs or organonitrates (ONs). They exhibit strong diurnal variations where HOMs peak during night and ONs during day. Finally, large clusters containing up to 40 carbon atoms (four oxidized
α-pinene units) were observed.
Naturally charged highly oxidised molecules (HOMs) were characterized using advanced mass...
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