Articles | Volume 16, issue 22
https://doi.org/10.5194/acp-16-14297-2016
https://doi.org/10.5194/acp-16-14297-2016
Research article
 | 
16 Nov 2016
Research article |  | 16 Nov 2016

How do air ions reflect variations in ionising radiation in the lower atmosphere in a boreal forest?

Xuemeng Chen, Veli-Matti Kerminen, Jussi Paatero, Pauli Paasonen, Hanna E. Manninen, Tuomo Nieminen, Tuukka Petäjä, and Markku Kulmala

Data sets

Boundary layer heights from the operative forecast model in use at the time by the European Centre for Medium-Range Weather Forecasts ECMWF http://www.ecmwf.int/en/forecasts/datasets

Aerosol and meteorological data at SMEAR II Hyytiälä forest station SMEAR http://avaa.tdata.fi/web/smart/smear/

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Short summary
Ionising radiation is responsible for air ion production. However, minor efforts have been invested in understanding the connection of observed air ions to ionising radiation in the lower atmosphere and underlying processes therein. In this work, we analysed 4 years of ambient data collected in a Finnish boreal forest and found that gamma radiation dominates air ion production in the lower atmosphere and demonstrated clear promotion effects of the ionising radiation on air ion production.
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