Highly cited researchers
The quality and impact of scientific research are increasingly being assessed based on calculations and analyses of the number of times researchers cite each other’s publications. This page introduces you to a number of researchers at the University of Helsinki whose work is cited the most by other researchers.
How did we choose these highly cited researchers?

Especially in the natural and life sciences, citation numbers are documented carefully in various citation databases. The most widely recognised of these are Scopus, owned by Elsevier, and Web of Science, owned by Clarivate Analytics.

The researchers presented on this page belong to the Highly Cited Researchers list by Clarivate Analytics. To be included in the list, researchers must rank among the top one per cent by citations for their field in the Web of Science database. In general, the humanities and social sciences are poorly covered in citation databases.

The disciplinary categorisation on this page follows that of the Highly Cited Researchers list. It is based on the field of publications in which the researcher’s articles have been published as well as on the researcher’s own assessment. The categorisation is not based on, for example, the faculty or unit in which the researcher works.

The number of citations is not the only way to measure the quality of research. Nevertheless, the most highly cited researchers are undoubtedly among the top in their field.

Atmospheric sciences

Time and again, atmospheric sciences are strongly represented on the lists of the most highly cited researchers.

Their success partly stems from the research environment of the Institute for Atmospheric and Earth System Research (INAR), which houses some of the world’s most prominent competence in aerosols.

Mikael Ehn

Mikael Ehn studies the pathways and fate of volatile organic compounds in the atmosphere.

He leads a research group focusing on atmospheric physical chemistry.

Veli-Matti Kerminen

Veli-Matti Kerminen studies the formation mechanisms of atmospheric particles and their impact on the climate.

Kerminen leads a research group investigating interactions between aerosols, clouds and the climate.

Markku Kulmala

Markku Kulmala studies the formation mechanisms of atmospheric aerosol particles. He has been the world’s most highly cited geoscientist since 2011.

Kulmala heads the Institute for Atmospheric and Earth System Research (INAR) and the Atmosphere and Climate Competence Center (ACCC). He is also an Academy Professor.

Tuukka Petäjä

Tuukka Petäjä is known for his aerosol research and especially for his development efforts focusing on aerosol research stations, measuring devices and techniques. He has played a key role in the development of measuring devices for the University of Helsinki research stations.

Petäjä heads the development of observation equipment for aerosol particles at the Institute for Atmospheric and Earth System Research (INAR).

Mikko Sipilä

Mikko Sipilä studies the polar atmosphere and how its interactions with the soil, forest and sea affect the formation of aerosols.

Sipilä heads the Värriö Subarctic Research Station as well as a research group that focuses on the formation of particles from atmospheric gases and on mass spectrometry.

Life sciences

Research in life sciences has grown stronger at the University of Helsinki especially after the establishment of HiLIFE – Helsinki Institute of Life Science.

Jaakko Kangasjärvi

Jaakko Kangasjärvi studies stress factors and stress-related signalling mechanisms at the cellular level in plants.

Kangasjärvi leads a research group focused on the formation of reactive oxygen species in response to stress in plants.

Biological and environmental sciences

Environmental research, traditionally a strong field at the University of Helsinki, has grown even stronger in recent years, thanks to, among other things, the establishment of the Helsinki Institute of Sustainability Science (HELSUS) as well as other strategic emphases.

Christopher Raymond

Christopher Raymond is recognised especially for his research into the relationship between humans and nature and for the development of various nature-based solutions for decision-making.

Raymond leads a research group that promotes the nurturing of biodiversity and the environment.

Health and medical sciences
Mark Daly

Mark Daly investigates the structure of the human genome and its individual variations. Much of Daly’s research makes use of the unique data in Finnish health registers and biobanks.

Daly is the director of the Institute for Molecular Medicine Finland (FIMM), which is part of HiLIFE – Helsinki Institute of Life Science.

Mikko Niemi

Mikko Niemi investigates genetic mutations associated with the efficacy and adverse effects of cholesterol medication.

Niemi leads a research group focusing on pharmacogenetics, in other words, studying how genes affect individuals’ response to drugs.

Willem de Vos

Willem de Vos studies the human microbiome, its contribution to health and diseases, as well as how, by shaping the microbiota, we can treat and prevent diseases.

De Vos leads a research group focused on the study of microbiota.

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