U. Hõrrak

5.5k total citations
56 papers, 2.2k citations indexed

About

U. Hõrrak is a scholar working on Atmospheric Science, Global and Planetary Change and Health, Toxicology and Mutagenesis. According to data from OpenAlex, U. Hõrrak has authored 56 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Atmospheric Science, 39 papers in Global and Planetary Change and 11 papers in Health, Toxicology and Mutagenesis. Recurrent topics in U. Hõrrak's work include Atmospheric chemistry and aerosols (42 papers), Atmospheric aerosols and clouds (34 papers) and Atmospheric Ozone and Climate (16 papers). U. Hõrrak is often cited by papers focused on Atmospheric chemistry and aerosols (42 papers), Atmospheric aerosols and clouds (34 papers) and Atmospheric Ozone and Climate (16 papers). U. Hõrrak collaborates with scholars based in Estonia, Finland and Germany. U. Hõrrak's co-authors include Hannes Tammet, Markku Kulmala, J. Salm, Lauri Laakso, Marko Vana, Veli‐Matti Kerminen, Miikka Dal Maso, Ilona Riipinen, Tuukka Petäjä and K. E. J. Lehtinen and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Atmospheric chemistry and physics and Atmospheric Research.

In The Last Decade

U. Hõrrak

52 papers receiving 2.0k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
U. Hõrrak Estonia 25 1.9k 1.4k 785 211 92 56 2.2k
Hannes Tammet Estonia 25 1.5k 0.8× 1.2k 0.8× 596 0.8× 256 1.2× 239 2.6× 67 2.3k
Anne Hirsikko Finland 20 1.9k 1.0× 1.3k 0.9× 1.1k 1.4× 390 1.8× 61 0.7× 50 2.4k
Marko Vana Estonia 15 1.3k 0.7× 1.0k 0.7× 576 0.7× 154 0.7× 38 0.4× 41 1.5k
J. Salm Estonia 13 842 0.5× 633 0.4× 380 0.5× 131 0.6× 44 0.5× 29 1.0k
Katrianne Lehtipalo Finland 27 2.5k 1.3× 1.5k 1.1× 1.5k 1.9× 466 2.2× 105 1.1× 85 2.8k
Tuomo Nieminen Finland 31 3.3k 1.8× 2.3k 1.6× 1.9k 2.4× 489 2.3× 46 0.5× 116 3.6k
Horst Fischer Germany 24 1.2k 0.6× 857 0.6× 287 0.4× 224 1.1× 190 2.1× 72 1.6k
W. A. Hoppel United States 26 2.4k 1.3× 2.0k 1.4× 635 0.8× 267 1.3× 246 2.7× 67 3.1k
Bengt G. Martinsson Sweden 24 1.5k 0.8× 1.3k 0.9× 492 0.6× 92 0.4× 78 0.8× 87 1.8k
G. M. Frick United States 20 2.0k 1.1× 1.7k 1.2× 482 0.6× 200 0.9× 157 1.7× 36 2.4k

Countries citing papers authored by U. Hõrrak

Since Specialization
Citations

This map shows the geographic impact of U. Hõrrak's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by U. Hõrrak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites U. Hõrrak more than expected).

Fields of papers citing papers by U. Hõrrak

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by U. Hõrrak. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by U. Hõrrak. The network helps show where U. Hõrrak may publish in the future.

Co-authorship network of co-authors of U. Hõrrak

This figure shows the co-authorship network connecting the top 25 collaborators of U. Hõrrak. A scholar is included among the top collaborators of U. Hõrrak based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with U. Hõrrak. U. Hõrrak is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kaasik, Marko, et al.. (2022). Links between the concentrations of gaseous pollutants measured in different regions of Estonia. Air Quality Atmosphere & Health. 16(1). 25–36. 1 indexed citations
2.
Barreira, Luis, Arttu Ylisirniö, Iida Pullinen, et al.. (2021). The importance of sesquiterpene oxidation products for secondary organic aerosol formation in a springtime hemiboreal forest. Atmospheric chemistry and physics. 21(15). 11781–11800. 25 indexed citations
3.
Größ, Johannes, Amar Hamed, A. Sonntag, et al.. (2018). Atmospheric new particle formation at the research station Melpitz, Germany: connection with gaseous precursors and meteorological parameters. Atmospheric chemistry and physics. 18(3). 1835–1861. 24 indexed citations
4.
5.
Tammet, Hannes, Kaupo Komsaare, & U. Hõrrak. (2013). Estimating neutral nanoparticle steady-state size distribution and growth according to measurements of intermediate air ions. Atmospheric chemistry and physics. 13(18). 9597–9603. 3 indexed citations
6.
7.
Yli‐Juuti, Taina, Tuomo Nieminen, Anne Hirsikko, et al.. (2011). Growth rates of nucleation mode particles in Hyytiälä during 2003−2009: variation with particle size, season, data analysis method and ambient conditions. Atmospheric chemistry and physics. 11(24). 12865–12886. 128 indexed citations
8.
Hirsikko, Anne, Tuomo Nieminen, S. Gagné, et al.. (2011). Atmospheric ions and nucleation: a review of observations. Atmospheric chemistry and physics. 11(2). 767–798. 192 indexed citations
9.
Gagné, S., Katrianne Lehtipalo, Hanna E. Manninen, et al.. (2011). Intercomparison of air ion spectrometers: a basis for data interpretation. 3 indexed citations
10.
Paasonen, Pauli, Tuomo Nieminen, Eija Asmi, et al.. (2010). On the roles of sulphuric acid and low-volatility organic vapours in the initial steps of atmospheric new particle formation. Atmospheric chemistry and physics. 10(22). 11223–11242. 196 indexed citations
11.
Mirme, Sander, A. Mirme, A. Minikin, et al.. (2010). Atmospheric sub-3 nm particles at high altitudes. Atmospheric chemistry and physics. 10(2). 437–451. 56 indexed citations
12.
Hirsikko, Anne, Tuomo Nieminen, S. Gagné, et al.. (2010). Atmospheric ions and nucleation: a review of observations. Työväentutkimus Vuosikirja. 5 indexed citations
13.
Tammet, Hannes, U. Hõrrak, & Markku Kulmala. (2009). Negatively charged nanoparticles produced by splashing of water. Atmospheric chemistry and physics. 9(2). 357–367. 39 indexed citations
14.
Kulmala, Markku, Anne Hirsikko, Tommi Bergman, et al.. (2008). Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest. Atmospheric chemistry and physics. 8(1). 129–139. 93 indexed citations
15.
Hõrrak, U., Tuula Aalto, J. Salm, et al.. (2008). Variation and balance of positive air ion concentrations in a boreal forest. Atmospheric chemistry and physics. 8(3). 655–675. 46 indexed citations
16.
Ruuskanen, T. M., Marko Kaasik, Tuula Aalto, et al.. (2007). Concentrations and fluxes of aerosol particles during the LAPBIAT measurement campaign at Värriö field station. Atmospheric chemistry and physics. 7(14). 3683–3700. 14 indexed citations
17.
Hirsikko, Anne, Tommi Bergman, Lauri Laakso, et al.. (2007). Identification and classification of the formation of intermediate ions measured in boreal forest. Atmospheric chemistry and physics. 7(1). 201–210. 97 indexed citations
18.
Kulmala, Markku, Lauri Laakso, K. E. J. Lehtinen, et al.. (2004). Initial steps of aerosol growth. Atmospheric chemistry and physics. 4(11/12). 2553–2560. 160 indexed citations
19.
Laakso, Lauri, K. E. J. Lehtinen, Ilona Riipinen, et al.. (2004). Initial steps of aerosol growth. 155 indexed citations
20.
Laakso, Lauri, Tuukka Petäjä, K. E. J. Lehtinen, et al.. (2004). Ion production rate in a boreal forest based on ion, particle and radiation measurements. Atmospheric chemistry and physics. 4(7). 1933–1943. 111 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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