Atmospheric molecules collide with each other which may initiate chemical reactions to occur. In that case the reactant molecule, e.g., volatile organic compound, converts to the product molecule, e.g., low-volatile organic molecule. This kind of product is ‘‘sticky,’’ meaning that when it collides with another molecule, they may stick to each other, and the aerosol particle formation process begins. Aerosol particles impact to the Earth’s surface temperature by directly scattering the sunlight and indirectly acting as cloud condensation nuclei. I use quantum chemistry, aerosol physics, and spectroscopy how molecular properties affect to oxidation chemistry and particle formation in the atmosphere. This ‘‘molecules to climate’’ integration is crucial for predicting impacts of aerosol particles on both air quality and climate change, which will aid to make environmentally sustainable political decisions. In 2018, I received PhD in physics from the University of Helsinki, and I obtained a postdoctoral fellowship to join University of California, Irvine. After that I was a postdoc at the University of Jyväskylä. In 2022, I got a title of Docent in Atmospheric Science, and I won a 5-yr academy research fellowship to become a principal investigator. I lead Molecular Level Atmospheric Science group in the Department of Chemistry at the University of Helsinki.
