Factors of air ion balance in a coniferous forest according to measurements in Hyytiälä, Finland

by H. Tammet, U. Hõrrak, U. Hõrrak, L. Laakso, M. Kulmala
Published 2006-01-01

Estimating neutral nanoparticle steady-state size distribution and growth according to measurements of intermediate air ions

by H. Tammet, K. Komsaare, U. Hõrrak
Published 2013-09-01

Negatively charged nanoparticles produced by splashing of water

by H. Tammet, U. Hõrrak, M. Kulmala
Published 2009-01-01

Identification and classification of the formation of intermediate ions measured in boreal forest

by A. Hirsikko, T. Bergman, L. Laakso, M. Dal Maso, I. Riipinen, U. Hõrrak, U. Hõrrak, M. Kulmala
Published 2007-01-01

Initial steps of aerosol growth

by M. Kulmala, L. Laakso, K. E. J. Lehtinen, I. Riipinen, M. Dal Maso, T. Anttila, T. Anttila, V.-M. Kerminen, U. Hõrrak, U. Hõrrak, M. Vana, M. Vana, H. Tammet
Published 2004-01-01

Atmospheric sub-3 nm particles at high altitudes

by S. Mirme, A. Mirme, A. Minikin, A. Petzold, U. Hõrrak, V. -M. Kerminen, M. Kulmala
Published 2010-01-01

Ion production rate in a boreal forest based on ion, particle and radiation measurements

by L. Laakso, T. Petäjä, K. E. J. Lehtinen, M. Kulmala, J. Paatero, U. Hõrrak, H. Tammet, J. Joutsensaari
Published 2004-01-01

Variation and balance of positive air ion concentrations in a boreal forest

by U. Hõrrak, P. P. Aalto, J. Salm, K. Komsaare, H. Tammet, J. M. Mäkelä, L. Laakso, M. Kulmala
Published 2008-02-01

Kinetic nucleation and ions in boreal forest particle formation events

by L. Laakso, T. Anttila, T. Anttila, K. E. J. Lehtinen, P. P. Aalto, M. Kulmala, U. Hõrrak, J. Paatero, M. Hanke, F. Arnold
Published 2004-01-01

Intercomparison of air ion spectrometers: an evaluation of results in varying conditions

by S. Gagné, K. Lehtipalo, H. E. Manninen, T. Nieminen, S. Schobesberger, A. Franchin, T. Yli-Juuti, J. Boulon, A. Sonntag, S. Mirme, A. Mirme, U. Hõrrak, T. Petäjä, E. Asmi, M. Kulmala
Published 2011-05-01

Growth rates of nucleation mode particles in Hyytiälä during 2003−2009: variation with particle size, season, data analysis method and ambient conditions

by M. Kulmala, J. Rinne, T. Petäjä, M. Dal Maso, J. Patokoski, H. E. Manninen, U. Hõrrak, E. Asmi, P. P. Aalto, A. Hirsikko, T. Yli-Juuti, T. Nieminen, I. Riipinen
Published 2011-12-01

Atmospheric new particle formation at the research station Melpitz, Germany: connection with gaseous precursors and meteorological parameters

by J. Größ, A. Hamed, A. Hamed, A. Hamed, A. Sonntag, G. Spindler, H. E. Manninen, H. E. Manninen, T. Nieminen, T. Nieminen, M. Kulmala, U. Hõrrak, C. Plass-Dülmer, A. Wiedensohler, W. Birmili, W. Birmili
Published 2018-02-01

Atmospheric ions and nucleation: a review of observations

by A. Hirsikko, T. Nieminen, S. Gagné, K. Lehtipalo, H. E. Manninen, M. Ehn, U. Hõrrak, V.-M. Kerminen, L. Laakso, P. H. McMurry, A. Mirme, S. Mirme, T. Petäjä, H. Tammet, V. Vakkari, M. Vana, M. Kulmala
Published 2011-01-01

On the roles of sulphuric acid and low-volatility organic vapours in the initial steps of atmospheric new particle formation

by P. Paasonen, T. Nieminen, E. Asmi, H. E. Manninen, T. Petäjä, C. Plass-Dülmer, H. Flentje, W. Birmili, A. Wiedensohler, U. Hõrrak, A. Metzger, A. Hamed, A. Laaksonen, M. C. Facchini, V.-M. Kerminen, M. Kulmala
Published 2010-11-01

Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest

by T. Suni, M. Kulmala, A. Hirsikko, T. Bergman, L. Laakso, P. P. Aalto, R. Leuning, H. Cleugh, S. Zegelin, D. Hughes, E. van Gorsel, M. Kitchen, M. Vana, U. Hõrrak, S. Mirme, A. Mirme, S. Sevanto, J. Twining, C. Tadros
Published 2008-01-01

Concentrations and fluxes of aerosol particles during the LAPBIAT measurement campaign at Värriö field station

by T. M. Ruuskanen, M. Kaasik, P. P. Aalto, U. Hõrrak, M. Vana, M. Mårtensson, Y. J. Yoon, P. Keronen, G. Mordas, D. Ceburnis, E. D. Nilsson, C. O'Dowd, M. Noppel, T. Alliksaar, J. Ivask, M. Sofiev, M. Prank, M. Kulmala
Published 2007-07-01

Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation

by M. Kulmala, I. Riipinen, T. Nieminen, M. Hulkkonen, L. Sogacheva, H. E. Manninen, P. Paasonen, T. Petäjä, M. Dal Maso, P. P. Aalto, A. Viljanen, I. Usoskin, R. Vainio, S. Mirme, A. Mirme, A. Minikin, A. Petzold, U. Hõrrak, C. Plaß-Dülmer, W. Birmili, V.-M. Kerminen
Published 2010-02-01

The importance of sesquiterpene oxidation products for secondary organic aerosol formation in a springtime hemiboreal forest

by L. M. F. Barreira, L. M. F. Barreira, A. Ylisirniö, I. Pullinen, A. Buchholz, Z. Li, H. Lipp, H. Junninen, U. Hõrrak, S. M. Noe, S. M. Noe, A. Krasnova, A. Krasnova, D. Krasnov, D. Krasnov, K. Kask, E. Talts, Ü. Niinemets, J. Ruiz-Jimenez, J. Ruiz-Jimenez, S. Schobesberger
Published 2021-08-01

Atmospheric nucleation: highlights of the EUCAARI project and future directions

by V.-M. Kerminen, T. Petäjä, H. E. Manninen, P. Paasonen, T. Nieminen, M. Sipilä, H. Junninen, M. Ehn, S. Gagné, L. Laakso, I. Riipinen, H. Vehkamäki, T. Kurten, I. K. Ortega, M. Dal Maso, D. Brus, A. Hyvärinen, H. Lihavainen, J. Leppä, K. E. J. Lehtinen, A. Mirme, S. Mirme, U. Hõrrak, T. Berndt, F. Stratmann, W. Birmili, A. Wiedensohler, A. Metzger, J. Dommen, U. Baltensperger, A. Kiendler-Scharr, T. F. Mentel, J. Wildt, P. M. Winkler, P. E. Wagner, A. Petzold, A. Minikin, C. Plass-Dülmer, U. Pöschl, A. Laaksonen, M. Kulmala
Published 2010-11-01

EUCAARI ion spectrometer measurements at 12 European sites – analysis of new particle formation events

by H. E. Manninen, T. Nieminen, E. Asmi, S. Gagné, S. Häkkinen, K. Lehtipalo, P. Aalto, M. Vana, A. Mirme, S. Mirme, U. Hõrrak, C. Plass-Dülmer, G. Stange, G. Kiss, A. Hoffer, N. Törő, M. Moerman, B. Henzing, G. de Leeuw, M. Brinkenberg, G. N. Kouvarakis, A. Bougiatioti, N. Mihalopoulos, C. O'Dowd, D. Ceburnis, A. Arneth, B. Svenningsson, E. Swietlicki, L. Tarozzi, S. Decesari, M. C. Facchini, W. Birmili, A. Sonntag, A. Wiedensohler, J. Boulon, K. Sellegri, P. Laj, M. Gysel, N. Bukowiecki, E. Weingartner, G. Wehrle, A. Laaksonen, A. Hamed, J. Joutsensaari, T. Petäjä, V.-M. Kerminen, M. Kulmala
Published 2010-08-01