Prof. Dan Jaffe is a professor at the University of Washington in the School of STEM (UW Bothell) and Department of Atmospheric Sciences (UW Seattle). He is the author of more than 200 peer-reviewed papers on air quality including regional and long-range transport of pollutants; ozone photochemistry; mercury; diesel and coal-train emissions and the chemistry of smoke. His work has been widely cited (20k+ citations, h-index of 80) and his research team has been funded by NSF, NOAA, EPA, NASA, industry and NGOs. He started and has run the Mt. Bachelor Observatory at 2.8 km asl for the past 20 years, and this is now the longest running continuous atmospheric chemistry observatory on the west coast of the U.S. At the UW, he teaches quantitative analysis, environmental chemistry, atmospheric chemistry and climate science. In 2021, he was elected to the Washington State Academy of Sciences. Dan is an avid fan of mountain sports and spends as much time as possible outside.