Research professors

Research professors of the Finnish Meteorological Institute represent the wide area of research conducted at FMI.

Juha Aalto

Research Professor (tenure track)

Areas of expertise:

  • Spatial modeling techniques and GIS

  • Cold-region earth surface systems

  • Local climate variability and microclimate

Professor Juha Aalto received his Ph.D. in physical geography from the University of Helsinki in 2015. After that he worked as a postdoctoral researcher at the Department of Geosciences and Geography, University of Helsinki funded by the Academy of Finland. His research has mainly focused on understanding and modeling cold-regions' climate variability and frost-induced earth surface processes.

Currently he is a research professor at the FMI, where his main responsibility is to develop, lead and communicate research on climate change impacts. He has published ca. 30 peer-reviewed papers over a wide range of topics covering e.g. gridded climate data, microclimate, and modeling of earth surface systems and species distributions. He pursuits to increase the realism of climate change impact models by better accounting for local scale environmental heterogeneity.


Juha Aalto,, tel. +358 50 409 0963, Twitter: @JuhaAalto4

Tommi Ekholm

Research Professor

Areas of expertise:

  • Climate change mitigation

  • Integrated Assessment Models

  • Energy systems

  • Climate policy and economics

  • Uncertainty and risk management

Professor Tommi Ekholm received his Ph.D. in operations research from Aalto University in 2013. His focus as a research professor at FMI deals with climate change mitigation, with recent research topics covering e.g. emission scenarios, hedging of climatic risks, and economically efficient mitigation strategies in energy and forest management. His main tools include quantitative techno-economic analyses, particularly with Integrated Assessment Models (IAMs), optimization and decision-making under uncertainty. In addition to academic research, prof. Ekholm has provided decision-support for climate policy in national, EU and international levels, e.g. in United Nations' climate negotiations.


Tommi Ekholm,, tel. +358 40 775 4079

Hilppa Gregow

Research Professor, Head of Weather and Climate Change Impact Research Unit

Areas of expertise:

  • Climate change impact research

  • Storm research

  • Assessment of extremes and risks

  • Weather and long range forecasting

  • Climate service and service co-creation

Professor Hilppa Gregow received her Ph.D. in forest sciences from University of Eastern Finland (UEF) in 2013. Currently she is a Head of FMI's Weather and Climate Change Impact Research Unit, which conducts multidisciplinary weather, climate and socio-economic impact research to support in climate change adaptation, risk assessments and development of climate services. Since 2017, she has also acted as Adjunct Professor in the field of meteorology and risk management, especially as regards impacts to forests, at the University of Eastern Finland. She has published over 50 peer-reviewed articles, mainly on meteorological research on wind and storms and impacts and risks of weather and climate on different sectors.


Hilppa Gregow,, tel. +358 50 598 6881, Twitter: @HilppaGregow

Alexey Karpechko

Research Professor (tenure track), Head of Polar Meteorology and Climatology group

Areas of expertise:

  • Stratospheric dynamics and climate

  • Sub-seasonal to seasonal predictability

  • Atmospheric teleconnections

Dr. Karpechko received his Ph. D. in Meteorology from the University of Helsinki in 2007. Currently he is the Head of Polar Meteorology and Climatology group, Meteorological Research Unit, at the FMI. He is also a Research Fellow of the Academy of Finland (2015-2020).

Karpechko is a guest lecturer at the University of Helsinki and University Centre in Svalbard (Norway) where he teaches stratospheric dynamics. He was a steering scientific group member (2015-2017) of the Stratosphere-troposphere Processes and their Role in Climate (SPAPC) project of the World Climate Research Program (WCRP) and was a Lead Author of World Meteorological Organization's Scientific Assessment of Ozone Depletion (2018). He has contributed to a number of international reports and published ca. 60 peer-reviewed papers mainly on stratosphere-troposphere dynamics and seasonal predictability.


Alexey Karpechko,, tel. +358 45 315 6020

Hannele Korhonen

Research Professor, Director of Climate Research Programme

Areas of expertise:

  • climate change

  • atmospheric and climate modelling

  • atmospheric aerosols and their impacts on clouds

Prof. Hannele Korhonen received her Ph.D. in physics from the University of Helsinki in 2004. Currently she acts as the Director of Climate Research Programme, which is responsible for FMI's atmospheric composition measurements, climate modelling on process, regional and global scales, as well as air quality research.

She has been a PI in several national and international projects and has received ERC consolidator and Academy Research Fellow grants. She is also an experienced review panel member for several international funding organizations. She has published over 70 peer-reviewed articles on the climate and air quality impacts of atmospheric aerosols. Her latest research has focused on improving aerosol-cloud interactions in climate models and on the role of background aerosols in weather modification efforts.


Hannele Korhonen,, tel. +358 40 8424 852, Twitter: @HanneleSKorhone

Jaakko Kukkonen


Areas of expertise:

  • the development, evaluation and application of mathematical models

  • the health effects of air pollution, allergenic pollen and meteorology

  • the evaluation of urban and regional air quality

  • the consequence analysis modelling of hazardous materials

Professor Jaakko Kukkonen received his Ph.D. in physics from the University of Helsinki in 1990. Currently he is Research Professor at the FMI, where his main responsibilities are the planning of new research projects, conducting and leading scientific research and procuring funding for research.  Jaakko is also a Visiting Professor at the University of Hertfordshire, U.K. and a Docent at the University of Helsinki.

He has been a PI in a number of projects, funded mainly by the EU and the Academy of Finland. He has published ca. 150 peer-reviewed papers, mainly on mathematical modelling of atmospheric physics and chemistry. Since 2020, he will lead a major EU project called "Evaluation, control and Mitigation of the EnviRonmental impacts of shippinG Emissions (EMERGE)" (currently in contract negotiation). Jaakko Kukkonen CV.


Jaakko Kukkonen,, tel. +358 505 202 684

Marko Laine

Research Professor (tenure track)

Areas of expertise:

  • statistical uncertainty quantification

  • Bayesian statistical analysis

  • large scale data fusion methods

Marko Laine is a research professor at FMI Meteorological Research unit. His current work focuses on statistical post processing for numerical weather prediction. He has extensive experience on statistical and mathematical analysis of geophysical models and data, specializing on uncertainty quantification. His software is widely used by the scientific community, most notably his Matlab toolbox for Markov chain Monte Carlo simulation. He has over 50 peer-reviewed scientific publications applying uncertainty quantification methods for various topics in natural sciences, including papers in Nature, Proceeding of the National Academy of Sciences, Journal of the Royal Statistical Society and SIAM Journal of Scientific Computing. His research interest include Markov chain Monte Carlo methods, time series analysis, data fusion for atmospheric remote sensing and general statistical inverse problems.

Anders Lindfors

Tenure Track Professor, Head of Group Areas of expertise:

  •     Atmospheric Radiation

  •     Solar and Wind Energy

  •     Weather Prediction

  •     Earth Observation

  •     Clouds and Aerosol

Professor Anders Lindfors received his Ph.D. in meteorology from the University of Helsinki in 2008. Since 2018, he has been leading a group on Meteorological Research Applications in the Meteorological Research Unit of FMI. His background is in research pertaining to atmospheric radiation, including, for example, studies on the effects of clouds and aerosols on solar radiation. He also has a strong interest in work relating to renewable energy, weather prediction, and satellite algorithms.


Anders Lindfors,, tel. +358 29 539 2112, Twitter: @lindfors_anders

Adriaan Perrels

Research Professor

Areas of expertise:

  • socioeconomic impact assessment of climate change

  • cost-benefit analysis of weather and climate services

  • weather and climate in transport and urban planning

Research professor Adriaan Perrels has a PhD in economics from the Free University Amsterdam (1992), with special reference to energy, environmental and spatial economics. Prior to FMI he worked for the Netherlands Energy Research Centre (ECN), Netherlands Organisation for Applied Scientific Research (TNO), and VATT Institute for Economic Research (Helsinki). Before 2009 he focused on economic evaluation of climate change mitigation policies and measures. Since then economic assessment of climate change impacts and adaptation where the prime focus of his work, supplemented by economic evaluation of the effectiveness of weather and climate information services.

His total number of publications amounts to 200, including 40 peer reviewed papers, and several books. He is member of the editorial boards of the journals Energy Efficiency and Climate Services. He has also acted as reviewer for various national science academies, foundations, and European bodies. He has led several EU projects as well as numerous national projects. A current key research interest is the role and effectiveness of information in climate and environmental policy.


Adriaan Perrels,, tel. +358 50 5838575, Twitter: @adriaanper

Jouni Pulliainen

Research Professor, Director of Space and Earth Observation Centre (FMI-SPACE)

Areas of expertise:

  • Modeling and inversion algorithms in remote sensing

  • Remote sensing data assimilation and application development for climate change studies, hydrology, weather prediction and traffic/logistics

  • Active and passive remote sensing of environmental processes of the cryosphere and boreal forest

Research professor Jouni Pulliainen has been active in Earth Observation (EO) science, technology, education, research infrastructures and innovations since 1988. Pulliainen received his Doctoral Thesis in Space Technology from Helsinki University of Technology in 1994. He is a pioneer in modelling and inversion/data assimilation algorithm development in snow remote sensing, as well as successfully developing both regional and global operational snow monitoring applications.

During his 10-year position in directing the Arctic Research of Finnish Meteorological Institute, J. Pulliainen executed his vision and expanded the Sodankylä Observatory into a satellite ground segment, which is one of the focus areas in the Finnish Space Strategy.

Currently Dr. Pulliainen is a Director the Space and Earth Observation Centre (FMI-SPACE) of the Finnish Meteorological Institute. He has an internationally recognised scientific leadership in boreal cryosphere EO application area. Jouni has authored around 300 scientific papers and technical reports in the field of remote sensing. Web-of-Science statistics in September 2019: 119 peer-reviewed journal articles (~4000 citations, h-index 34).

Research IDORCID


Jouni Pulliainen,, tel. +358 50 5895821, website FMI-SPACE

Aku Riihelä

Research Professor (Tenure Track)

Areas of expertise:

  • retrieval of Earth's surface albedo from satellite observations, particularly for Arctic sea ice, seasonal snow cover, and the Greenland Ice Sheet

  • changes in Arctic cryosphere

  • determination and evaluation of downwelling solar radiation from remote sensing data to support solar energy production forecasting

  • the surface energy budget of the Arctic

Research Professor (Tenure Track) Aku Riihelä received his D.Sc. (Tech) from Aalto University in 2014 in the field of space technology. His present research focuses on the long-term monitoring of Arctic cryosphere from satellite observations, and in the evaluation and attribution of changes in the high-latitude snow and ice cover. He is a recipient of the Academy of Finland postdoctoral researcher funding (2015-2018), and is presently PI of an Academy of Finland 4-year research project focusing on the Arctic cryosphere. He has published ca. 30 peer reviewed papers in leading journals of the field, including The Cryosphere and Nature Climate Change.


Aku Riihelä,, tel. +358 50 380 3308

Mikhail Sofiev

Research Professor, deputy of Head of AQ Modelling group, Finnish Meteorological Institute, Atmospheric Composition Research

Areas of expertise:

  • Mathematical modelling of atmospheric pollution. Extensive practical experience in development and application of air pollution models for various scales – from meso- to globe – and compounds – acidifying, toxic, aerosols, radio-active accidental releases, etc.

  • Extensive experience in the related fields – model evaluation, data assimilation, statistical methodology, ensemble prediction, data analysis, computer experiments, etc.

  • Principal scientist of the SILAM chemistry transport model and  fire information system IS4FIRES.

M.Sofiev is the author of 216 scientific publications; 119 of these have been published in refereed journals and books (h-index = 40, Google Scholar 6.9.2019). He has given over 400 lectures and presentations at scientific and application conferences. He established an original atmospheric composition modelling course at University of Helsinki.


Mikhail Sofiev,, tel. +358 29 539 5433

Yrjö Viisanen

Research professor

Areas of expertise:

  • Experimental nucleation and condensation studies and their application to atmospheric processes

  • Monitoring of climatically active species

Professor Yrjö Viisanen received his Ph.D. in physics from the University of Helsinki in 1991. Currently he is research professor at the FMI. Yrjö is also a docent of physics at the University of Helsinki and at University of Eastern Finland.

He has been a PI in a number of projects funded mainly by the EU and the Academy of Finland. He is member of Finnish climate panel. He has published ca. 120 peer reviewed papers mainly on aerosol-cloud-climate interactions, and his current research interests include ice nucleation and adsorption properties of atmospheric aerosols. 


Yrjö Viisanen,, tel. +358 50 3366919