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3:30 p.m.

AOSC Seminar by Dr. Dylan Jones, 11/12/2020

AOSC Seminar

Dr. Dylan Jones

Department of Physics, University of Toronto

Title: Summertime ozone in North America: Isolating weather-driven ozone pollution events and
evaluating trends in precursor emissions


Air pollution regulations have led to dramatic reductions in emissions of air quality pollutants in
North America, and thus improvements in air quality, during the past three decades. However,
ozone pollution episodes remain an issue in some regions of North America. Furthermore, there
are uncertainties in the trend in emissions of nitrogen oxides (NOx), a key ozone precursor. In
this talk I will examine the link between summertime ozone pollution episodes and large-scale
atmospheric circulation patterns and present an analysis isolating the weather-driven component
of ozone pollution episodes. I will also review the discrepancies in recent trends of emissions of
NOx in the United States and discuss the use of a deep learning model to evaluate the
consistency of the reported trends in NOx emissions with observations of surface ozone.


Dylan Jones is a professor in the Department of Physics at the University of Toronto. He
received his B.A. in Physics and Astronomy and Astrophysics from Harvard University in 1990,
his M.Sc. in Applied Physics from Harvard University in 1994, and his Ph.D. in Earth and
Planetary Sciences from Harvard University in 1998. His research is focused on integrating
measurements of atmospheric composition with global three-dimensional models of chemistry
and transport to develop a better understanding of how pollution influences the chemical and
dynamical state of the atmosphere. His research also uses chemical data assimilation and inverse
modeling techniques to quantify surface fluxes of trace constituents that are important for air
quality and the global carbon cycle.


Contact: Ross Salawitch

AOSC Seminar

Pre-seminar refreshment: N/A
Seminar: 3:30-4:30pm, Zoom
Meet-the-Speaker: 4:30-5:00pm, Zoom [For AOSC Students only]

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