Ilona Riipinen

Room: X227
Phone: +46 8 674 7284
Mobile: +46 73 585 9251

What I do

The air we breathe does not consist of gas molecules only: each cubic centimetre of atmospheric air typically contains thousands of small aerosol particles. These liquid or solid airborne particles originate from both natural sources (e.g. forests, oceans, deserts) as well as human activities (e.g. combustion processes, traffic), and their diameters span from nanometres to hundreds of micrometres.

Atmospheric aerosol particles play an important role in defining the environments we live in. When inhaled, many particles are harmful to human health. Atmospheric particles also decrease visibility and damage buildings and landmarks when deposited on their surfaces. On global scale, aerosols regulate the Earth’s energy balance and therefore the climate. In current climate models aerosols are still poorly represented: the Intergovernmental Panel on Climate Change recognizes aerosols as the largest individual source of uncertainty in calculations of the Earth’s radiative forcing.

My research focuses on understanding the sources, sinks and evolution of atmospheric aerosol particles and their interactions with clouds, climate and human health. My current focus is largely on the interactions between aerosol particles and the atmospheric gas phase, in particular the formation and effects of atmospheric organic aerosol and thus the feedback between ecosystems, human activities and climate.

Together with my colleagues, I work mainly with atmospheric computational models representing the processes governing the evolution and impacts of atmospheric aerosol populations. We model the evolution of atmospheric aerosol from the molecular to the global scale, with a tight connection to experimental data from both laboratory and field studies. The underlying philosophy is that to correctly upscale the molecular level processes to global scale, the scientists working on the fundamental theory need to be brought together with the scientists working on the highly simplified aerosol descriptions in regional and global atmospheric models.

Complete list of publications

Alumni (PhD students and post-docs I have mentored)

Dr. Erica Trump (Carnegie Mellon University, now at OSIsoft)

Dr. Taina Yli-Juuti (University of Helsinki, now at University of Eastern Finland)

Dr. Benjamin Murphy (Stockholm University, now at US Environmental Protection Agency)

Dr. Silja Häme (formerly Häkkinen) (University of Helsinki, now at University of Helsinki)

Dr. Juan Camilo Acosta Navarro (Stockholm University, now at Barcelona Supercomputing Center)

Dr. Elham Baranizadeh  (University of Eastern Finland, now at South Coast Air Quality Management District, US)

Dr. Jan Julin  (Stockholm University, now at ThermoCalc AB)

Dr. Lars Ahlm  (Stockholm University, now at Vinnova)

Dr. Maryam Dalirian  (Stockholm University, now at Astra Zeneca AB)

Dr. Narges Rastak (Stockholm University, now at Helmholtz Zentrum Munich)

Dr. Jenni Kontkanen (Stockholm University, now at University of Helsinki)

Dr. Tanja Dallafior (Stockholm University, now at RMS – Risk Management Solutions Inc.)

Dr. Tinja Olenius (Stockholm University, now at Swedish Meteorological and Hydrological Insitute SMHI)

Dr. Samuel Lowe (Stockholm University, now at Stockholm University)

Major part of my work is funded by the European Research Council starting grant ATMOGAIN (grant No 278277-ATMOGAIN) and consolidator grant INTEGRATE (grant No 867599-INTEGRATE), Horizon 2020 project FORCeS, Marie Curie Innovative Training Network iMIRACLI,  Vetenskapsrådet, Formas and the Wallenberg Academy Fellowship program (grant No 2015.0162 AtmoRemove).

Latest scientific papers

Tropical and Boreal Forest – Atmosphere Interactions: A Review

Paulo Artaxo; Hans-Christen Hansson; Meinrat O. Andreae; Jaana Bäck; Eliane Gomes Alves; Henrique M. J. Barbosa; Frida Bender; Efstratios Bourtsoukidis; Samara Carbone; Jinshu Chi; Stefano Decesari; Viviane R. Després; Florian Ditas; Ekaterina Ezhova; Sandro Fuzzi; Niles J. Hasselquist; Jost Heintzenberg; Bruna A. Holanda; Alex Guenther; Hannele Hakola; Liine Heikkinen; Veli-Matti Kerminen; Jenni Kontkanen; Radovan Krejci; Markku Kulmala; Jost V. Lavric; Gerrit de Leeuw; Katrianne Lehtipalo; Luiz Augusto T. Machado; Gordon McFiggans; arco Aurelio M. Franco; Bruno Backes Meller; Fernando G. Morais; Claudia Mohr; William Morgan; Mats B. Nilsson; Matthias Peichl; Tuukka Petäjä; Maria Praß; Christopher Pöhlker; Mira L. Pöhlker; Ulrich Pöschl; Celso Von Randow; Ilona Riipinen; Janne Rinne; Luciana V. Rizzo; Daniel Rosenfeld; Maria A. F. Silva Dias; Larisa Sogacheva; Philip Stier; Erik Swietlicki; Matthias Sörgel; Peter Tunved; Aki Virkkula; Jian Wang; Bettina Weber; Ana Maria Yáñez-Serrano; Paul Zieger; Eugene Mikhailov; James N. Smith; Jürgen Kesselmeier
2022 | TELLUS B | 74 (24-163)

Insights into the molecular composition of semi-volatile aerosols in the summertime central Arctic Ocean using FIGAERO-CIMS

Siegel, K.; Karlsson, L.; Zieger, P.; Baccarini, A.; Schmale, J.; Lawler, M.; Salter, M.; Leck, C.; Ekman, A.; Riipinen, I.; Mohr, C.
2021 | Environ. Sci. Atmos. | 1 (4) (161-175)

Photolytically induced changes in composition and volatility of biogenic secondary organic aerosol from nitrate radical oxidation during night-to-day transition

Wu, C; Bell, DM; Graham, EL; Haslett, S; Riipinen, I; Baltensperger, U; Bertrand, A; Giannoukos, S; Schoonbaert, J; El Haddad, I; Prevot, ASH; Huang, W; Mohr, C
2021 | Atmos. Chem. Phys. | 21 (19) (14907-14925)

Steady-State Mass Balance Model for Predicting Particle-Gas Concentration Ratios of PBDEs

2021 | Environ. Sci. Technol. | 55 (14) (9425-9433)

Transport and chemistry of isoprene and its oxidation products in deep convective clouds

Bardakov, R; Thornton, JA; Riipinen, I; Krejci, R; Ekman, AML
2021 | Tellus Ser. B-Chem. Phys. Meteorol. | 73 (1)

All publications

Atmospheric Science

The life cycle and impact of tiny atmospheric particles known as aerosols – both indoors as well as outdoors.