Lixu Jin, who recently completed his Ph.D. in chemistry at the University of Montana, has published research in Science Advances that explores how wildfire smoke plumes evolve and impact air quality and human health. The study addresses gaps in current scientific models used to predict the harmful components found in wildfire smoke and suggests ways to improve these models.
“When I see news about wildfires, I immediately think about what that smoke means for the air people are breathing – not just near the fire but in communities downwind,” Jin said. “That makes the science feel very real and urgent. And it excites me to use chemistry and measurements to better understand what’s in smoke, how it changes and how it affects air quality and health.”
The research highlights that biomass burning affects global air quality and climate, with ozone playing a significant role as both an air toxin and greenhouse gas. Jin noted that representing ozone accurately in air quality models remains challenging. Recent aircraft-based observations have provided new insights into how emissions from biomass burning change chemically at the plume scale, offering opportunities to refine larger-scale atmospheric models.
Jin’s team analyzed data from five wildfire plumes sampled during three separate aircraft campaigns across five U.S. states, focusing on the first five hours of chemical evolution within each plume. This approach allowed them to observe changes in various fuel types and plume sizes.
Atmospheric chemists rely on chemical mechanisms within their models to understand substances like ozone and hydroxyl radicals, which are central to biomass burning plume chemistry. Jin’s findings point out gaps in these models, aiming to clarify how biomass burning contributes to Earth’s climate system.
“These findings are poised to meaningfully influence both the atmospheric chemistry and Earth-system modeling research communities,” said Lu Hu, a researcher at UM who mentored Jin.
Jin arrived at UM in 2019 after earning an undergraduate degree with honors from Lanzhou University in China. He was drawn by both academic interests—particularly UM’s expertise in wildfires—and by Montana’s reputation for natural beauty.
“Honestly, UM first got my attention because of Montana’s image in pop culture – ‘A River Runs Through It’ and later the series ‘Yellowstone,’” Jin said. “On the academic side, UM was also a perfect fit for my research interests in wildfires and smoke, and I was especially excited to work with experts like Lu Hu and Bob Yokelson.”
He added: “UM gave me that, and it also gave me strong mentoring and the chance to do impactful research in a region where wildfire smoke is an important real-world problem,” he said. “During my Ph.D., I built skills using different kinds of models to interpret field measurements and connect observations to atmospheric chemistry.”
Jin now plans to develop expertise using satellite observations alongside field data and modeling techniques so he can study air pollution from local up to global scales.
“My next step is to develop deep expertise in satellite observations,” Jin said. “My goal is to combine field data, modeling and satellites so I can study air pollution from local and regional scales all the way up to the global scale.”
His article is titled “Ozone photochemistry is fresh biomass burning smoke over the United States.” Jin has begun postdoctoral work at Rutgers University where he will continue studying wildfire smoke using satellite data.
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