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 Thursday, 04 May 2023

    Video-Recording for any system with MP4-support

   - Video.mp4  (ca. XXX Mb)

 15:15 – 16:20


 "Microphysics and chemistry of atmospheric aerosol particles and clouds

               - complex, non-linear, but important for life on Earth"


                                              Ilona Riipinen

                                       (Department of Environmental Science, SU)



Besides gas molecules, the Earth's atmosphere contains condensed-phase

particles, whose sizes range from a few nanometers to hundreds of

micrometers. Some of these aerosol particles are visible in the form

of smoke, dust, haze or cloud droplets, which are large enough to

directly scatter and absorb light. The vast majority, however, need to

be observed by other means. Atmospheric aerosol particles, including

cloud droplets and ice crystals, are in constant interaction with the

each other, gas-phase molecules and the surrounding environment. Many

of these interactions are highly non-linear, multi-scale phenomena that

involve a large number of different molecular species. While the complex

processes governing the evolution of atmospheric aerosol and clouds are

challenging to describe, their improved numerical prediction is necessary

because of the important role aerosols and clouds play in the climate

system and for air quality. In the past decades, notable steps forward

have been taken both in terms of better empirical characterization of

aerosol particles and clouds as well s their numerical prediction -

and more important developments are in the horizon. In my presentation,

I will present some of these past developments and their importance for

air quality and climate projection, as well as highlight some recent

results from the research forefront.



Ilona Riipinen (PhD from Univ. Helsinki, 2008) is a Professor at the

Department of Environmental Science, SU. During 2009-2011, she was a

postdoctoral fellow at Carnegie Mellon University, where she is still an

Adjunct Professor in the Department of Chemical Engineering. She worked

as an assistant professor at University of Stockholm from 2011 to 2016

and became Professor in 2017.


Ilona Riipinen received the 2023 Göran Gustafsson Prize. She also

received the Smoluchowski Award from the International Union for

Geodesy and Geophysics in 2014. In 2015, she became also a Wallenberg

Academy Fellow. In 2016 and 2017 she was one of the world's most cited

geoscientists included in a group of the world's 3100 most highly cited



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