@Article{acpd-6-3135-2006, AUTHOR = {Tammet, H. and Hõrrak, U. and Laakso, L. and Kulmala, M.}, TITLE = {Factors of air ion balance in a coniferous forest according to measurements in Hyytiälä, Finland}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {6}, YEAR = {2006}, NUMBER = {2}, PAGES = {3135--3174}, URL = {http://www.atmos-chem-phys-discuss.net/6/3135/2006/}, ISSN = {1680-7367} }