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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)
Abstract:
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.
Biography:
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
researchers.