Boy , M. , Kulmala , M. , Ruuskanen , T. M. , Pihlatie , M. , Reissell A. and co-authors . 2005 . Sulphuric acid closure and contribution to nucleation mode particle growth. Atmos. Chem. Phys . 5 , 863 - 878 .
Dal Maso , M. , Kulmala , M. , Riipinen , I. , Wagner , R. , Hussein , T. and co-authors . 2005 . Formation and growth rates of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR11, Hyytiälä, Finland. Boreal Environ. Res . 10 , 323 - 336 .
Dal Maso , M. , Sogacheva , L. , Aalto , P. P. , Riipinen , I. , Komppula , M. and co-authors . 2007 . Aerosol size distribution measurements at four Nordic field stations: identification, analysis and trajectory analysis of new particle formation bursts. Tellus 59B, 350 - 361 .
Gagne , S. , Laakso , L. , Petäjä , T. , Kerminen , V.-M. and Kulmala , M . 2008 . Analysis on one year of Ion-DMPS data from the SMEAR II station, Hyytiälä. Tellus 60B, this issue.
Hari , P. and Kulmala , M . 2005 . Station for measuring ecosystem-atmosphere relations (SMEAR II). Boreal Environ. Res . 10 , 315 – 322 .
Hirsikko , A. , Paatero , J. , Hatakka , J. and Kulmala , M . 2007 . The 222Rri activity concentration, external radiation dose and air ion production rates in a boreal forest in Finland between March 2000and June 2006. Boreal Environ. Res . 12 , 265 – 278 .
Hörrak , U. , Aalto , RP. , Salm , J. , Mäkelä J.M. , Laakso , L. and Kulmala , M . 2005 . Characterization of air ions in boreal forest air during BIO-FOR III campaign. Atmos. Chem. Phys. Discuss . 5 , 2749 – 2790 .
Ibald-Mulli , A. , Wichmann , H. E. , Kreyling , W. and Peters , A . 2002 . Epidemiological evidence on health effects of ultrafine particles. J. Aerosol Med . 15 , 189 – 201 .
Kerminen , V.-M. , Pirjola , L. and Kulmala , M . 2001 . How significantly does coagulational scavenging limit atmospheric particle production? J. Geophys. Res . 106 , 24119 – 24126 .
Kerminen , V.-M. , Anttila , T. , Petäjä , T. , Laakso , L. , Gagne , S. and co-authors . 2007 . Charging state of the atmospheric nucleation mode: implications for separating neutral and ion-induced nucleation. J. Geo-phys. Res . 112 , D21205, doi: https://doi.org/10.1029/2007JD008649 .
Kim , T ., Ishida , 0. I. , Adachi , M. , Okuyama , K . and Seinfeld , J. H. 1998. Nano-meter sized particle formation from NH3/S02/H20/air mixtures by ionizing irradiation. Aerosol Sci. Tech . 29 , 111 - 125 .
Kulmala , M . 2003 . How Particles Nucleate and Grow. Science 302 , 1000 – 1001 .
Kulmala , M. and Tammet , H . 2007 . Finnish-Estonian air ion and aerosol workshops. Boreal Environ. Res . 12 , 237 – 245 .
Kulmala , M. , Pirjola , L. and Mäkelä J. M. 2000. Stable sulphate clusters as a source of new atmospheric particles. Nature 404 , 66 - 69 .
Kulmala , M. , Hämeri , K. , Aalto , RP. , Makela , J.M. , Pirjola , L. and co-authors . 2001 . Overview of the international project on biogenic aerosol formation in the boreal forest (BIOFOR). Tellus , B53, 324 - 343 .
Kulmala , M. , Vehkamai , H. , Petäjä T. , Dal Maso , M. , Lauri , A. and co-authors . 2004 a, Formation and growth rates of ultrafine atmospheric particles: a review of observations. J. Aerosol. Sci . 35 , 143 - 176 .
Kulmala , M. , Kerminen , V.-M. , Anttila , T. , Laaksonen , A. and O'Dowd , C. D . 2004b . Organic aerosol formation via sulphate cluster activation. J. Geophys. Res . 109 ( D4 ), 4205 , doi: https://doi.org/10.1029/2003JDO03961 .
Kulmala , M ., Lehtinen , K. E. J. and Laaksonen , A . 2006. Cluster ac-tivation theory as an explanation of the linear dependence between formation rate of 3 nm particles and sulphuric acid concentration. Atmos. Chem. Phys . 6 , 787 - 793 .
Kulmala , M. , Mordas , G. , Petäjä T. , Grönholm , T. , Aalto , P. P. and co-authors . 2007 a. The condensation particle counter battery (CPCB): a new tool to investigate the activation properties of nanoparticles. J. Aerosol Sci . 38 , 289 - 304 .
Kulmala , M. , Riipinen , I. , Sipilä , M. , Manninen , H. E. , Petäjä , T. and co-authors. 2007b . Science 318 , 89 – 92 .
Laakso , L. , Hirsikko , A. , Grönholm , T. , Luts , A. , Parts , T.-E. and co-authors . 2006 . Waterfalls as sources of small charged aerosol particles. Atmos. Chem. Phys . 7 , 2271 - 2275 .
Lee , S.-H. , Young , L.-H. , Benson , D. R. , Kulmala , M. , Junninen , H . and co-authors. 2008. Observations of nighttime new particle formation in the troposphere. J. Geophyl. Res . doi: https://doi.org/10.1029/2007JD009351 .
Lyubovtseva , Y. S. , Sogacheva , L. , Dal Maso , M. , Bonn , B. , Keronen , P . and co-authors. 2005. Seasonal variations of trace gases, meteoro-logical parameters, and formation of aerosols in boreal forests. Boreal Environ. Res . 10 ,493-510.
Maelä J. M. , Aalto , P. , Jokinen , V. , Pohja , T. , Nissinen , A . and co-authors. 1997. Observations of ultrafine aerosol particle formation and growth in boreal forest. Geophys. Res. Lett . 24 , 1219 - 1222 .
Mirme , A. , Tamm , E. , Mordas , G. , Vana , M. , Uin , J. and co-authors. 2007. A wide range multi-channel air ion spectrometer. Boreal Environ. Res . 12 , 247 - 264 .
Parts , T.-E. , Luts , A. , Laakso , L. , Hirsikko , A. , Grönholm , T. and co-authors . 2007 . Chemical composition of waterfall-induced air ions: spectrometry vs . simulations. Boreal Environ. Res. 12 , 409 - 420 .
Pope , C. A., BI and Dockery , D. W. 2006. Health effects of fine particu-late air pollution: lines that connect. J. Air Waste Manage. Assoc . 56 , 709 - 742 .
Sogacheva , L. , Dal Maso , M. , Kerminen , V.-M. and Kulmala , M . 2005 . Probability of nucleation events and aerosol particle concentration in different air mass types arriving at Hyytiä1ä, southern Finland, based on back trajectory analysis. Boreal Environ. Res . 10, 479 – 491 .
Suni , T. , Kulmala , M. , Hirsikko , A. , Bergman , T. , Laakso , L. and co-authors . 2008 . Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest. Atmos. Chem. Phys. Discuss . 7 , 10343 - 10369 .
Tammet , H . 1995 . Size and mobility of nanometer particles, clusters and ions. J. Aerosol Sci . 26 , 459 – 475 .
Tammet , H . 2004 . Balance scanning mobility analyzer BSMA. In: Pro- ceedings of the 16th Interantional Conference on Nucleation and Atm-sopheric Aerosols (eds.M. Kasahara and M. Kulmala). Kyoto, 294 - 297 .
Vehkamäki , H. , Dal Maso , M. , Hussein , T. , Flanagan , R., Hyvärinen, A. and co-authors. 2004. Atmospheric particle formation events at yam. measurement station in Finnish Lapland 1998-2002. Atmos. Phys. Chem . 4 , 2015– 2023 .
Weschler , C . J. 2006. Ozone's impact on public health: contributions from indoor exposures to ozone and products of ozone-initiated chem-istry, Environ. Health Persp . 114 , 1489-1496
Wiedensohler , A. , Hansson , H.-C. , Orsini , D. , Wendisch , M ., Wagner, E and co-authors. 1997. Night-time formation and occurrence of new particles associated with orographic clouds. Atmos. Environ . 31, 2545-255 9 .