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Urmas Hõrrak
Urmas Hõrrak
University of Tartu, Institute of Physics
Verified email at ut.ee
Title
Cited by
Cited by
Year
Atmospheric ions and nucleation: a review of observations
A Hirsikko, T Nieminen, S Gagné, K Lehtipalo, HE Manninen, M Ehn, ...
Atmospheric Chemistry and Physics 11 (2), 767-798, 2011
2962011
Initial steps of aerosol growth
M Kulmala, L Laakso, KEJ Lehtinen, I Riipinen, M Dal Maso, T Anttila, ...
Atmospheric Chemistry and Physics 4 (11/12), 2553-2560, 2004
2712004
EUCAARI ion spectrometer measurements at 12 European sites–analysis of new particle formation events
HE Manninen, T Nieminen, E Asmi, S Gagné, S Häkkinen, K Lehtipalo, ...
Atmospheric Chemistry and Physics 10 (16), 7907-7927, 2010
2682010
On the roles of sulphuric acid and low-volatility organic vapours in the initial steps of atmospheric new particle formation
P Paasonen, T Nieminen, E Asmi, HE Manninen, T Petäjä, ...
Atmospheric Chemistry and Physics 10 (22), 11223-11242, 2010
2652010
General overview: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI)–integrating aerosol research from nano to global scales
M Kulmala, A Asmi, HK Lappalainen, U Baltensperger, JL Brenguier, ...
Atmospheric Chemistry and Physics 11 (24), 13061-13143, 2011
2482011
Annual and size dependent variation of growth rates and ion concentrations in boreal forest
A Hirsikko, L Laakso, U Hõrrak, PP Aalto, VM Kerminen, M Kulmala
Boreal environment research 10 (5), 357, 2005
2052005
Statistical characterization of air ion mobility spectra at Tahkuse Observatory: Classification of air ions
U Hõrrak, J Salm, H Tammet
Journal of Geophysical Research: Atmospheres 105 (D7), 9291-9302, 2000
1922000
Growth rates of nucleation mode particles in Hyytiälä during 2003− 2009: variation with particle size, season, data analysis method and ambient conditions
T Yli-Juuti, T Nieminen, A Hirsikko, PP Aalto, E Asmi, U Hõrrak, ...
Atmospheric Chemistry and Physics 11 (24), 12865-12886, 2011
1732011
A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions
RS Sokhi, V Singh, X Querol, S Finardi, AC Targino, M de Fatima Andrade, ...
Environment international 157, 106818, 2021
1642021
Bursts of intermediate ions in atmospheric air
U Horrak, J Salm, H Tammet
Journal of Geophysical Research: Atmospheres 103 (D12), 13909-13915, 1998
1641998
Ion production rate in a boreal forest based on ion, particle and radiation measurements
L Laakso, T Petäjä, KEJ Lehtinen, M Kulmala, J Paatero, U Horrak, ...
Atmospheric Chemistry and Physics 4 (7), 1933-1943, 2004
1572004
Atmospheric nucleation: highlights of the EUCAARI project and future directions
VM Kerminen, T Petäjä, HE Manninen, P Paasonen, T Nieminen, M Sipilä, ...
Atmospheric chemistry and physics 10 (22), 10829-10848, 2010
1552010
Kinetic nucleation and ions in boreal forest particle formation events
L Laakso, T Anttila, KEJ Lehtinen, PP Aalto, M Kulmala, U Horrak, ...
Atmospheric chemistry and physics 4 (9/10), 2353-2366, 2004
1432004
Global analysis of continental boundary layer new particle formation based on long-term measurements
T Nieminen, VM Kerminen, T Petäjä, PP Aalto, M Arshinov, E Asmi, ...
Atmospheric Chemistry and Physics 18 (19), 14737-14756, 2018
1382018
Long-term field measurements of charged and neutral clusters using Neutral cluster and Air Ion Spectrometer (NAIS).
HE Manninen, T Petäjä, E Asmi, I Riipinen, T Nieminen, J MikkiIä, ...
Boreal Environment Research 14 (4), 2009
1332009
Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest
T Suni, M Kulmala, A Hirsikko, T Bergman, L Laakso, PP Aalto, R Leuning, ...
Atmospheric Chemistry and Physics 8 (1), 129-139, 2008
1282008
Identification and classification of the formation of intermediate ions measured in boreal forest
A Hirsikko, T Bergman, L Laakso, M Dal Maso, I Riipinen, U Horrak, ...
Atmospheric Chemistry and Physics 7 (1), 201-210, 2007
1282007
Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation
M Kulmala, I Riipinen, T Nieminen, M Hulkkonen, L Sogacheva, ...
Atmospheric Chemistry and Physics 10 (4), 1885-1898, 2010
1182010
Atmospheric sub-3 nm particles at high altitudes
S Mirme, A Mirme, A Minikin, A Petzold, U Horrak, VM Kerminen, ...
Atmospheric Chemistry and Physics 10 (2), 437-451, 2010
1022010
Pan-Eurasian Experiment (PEEX): Towards holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the Northern Eurasian region
HK Lappalainen, VM Kerminen, T Petäjä, T Kurten, A Baklanov, ...
Atmospheric Chemistry and Physics Discussions 2016, 1-107, 2016
972016
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