About the Authors
- Pekka Janhunen
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*To whom correspondence should be addressed. E-mail: pekka.janhunen@fmi.fi
Affiliations Department of Physical Sciences, University of Helsinki, Helsinki, Finland, Finnish Meteorological Institute, Space Research, Helsinki, Finland
- Hermanni Kaartokallio
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Affiliation Finnish Institute of Marine Research, Helsinki, Finland
- Ilona Oksanen
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Affiliations Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland, Department of Botany, University of Stockholm, Stockholm, Sweden
- Kirsi Lehto
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Affiliations Nordic Institute for Theoretical Physics (NORDITA), Copenhagen, Denmark, Department of Biology, University of Turku, Turku, Finland
- Harry Lehto
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Affiliations Nordic Institute for Theoretical Physics (NORDITA), Copenhagen, Denmark, Tuorla Observatory, University of Turku, Turku, Finland
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Analyzed the data: PJ. Wrote the paper: PJ HK IO KL HL.