- Dataset from measurement report: Increasing trend of atmospheric ion concentrations in the boreal forest(2022-05-31) Sulo, Juha; Lampilahti, Janne; Chen, Xuemeng; Kontkanen, Jenni; Nieminen, Tuomo; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku; Lehtipalo, Katrianne; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Sulo, Juha; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Lampilahti, Janne; Laboratory of Environmental Physics, University of Tartu - Chen, Xuemeng; CSC - IT Center for Science Ltd. - Kontkanen, Jenni; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Nieminen, Tuomo; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Kerminen, Veli-Matti; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Petäjä, Tuukka; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Kulmala, Markku; Institute for Atmospheric and Earth System Research/Physics, University of Helsinki - Lehtipalo, Katrianne