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About

Dr. Alexandra Chudnovsky is a leading atmospheric scientist whose research focuses on the complex interactions between aerosols, air quality, and climate, with a particular emphasis on satellite remote sensing and lidar observations. Her most impactful work documented the unprecedented 2017 Canadian wildfire smoke plume that reached the stratosphere over central Europe, where she and her colleagues observed light extinction coefficients 20 times higher than those following the 1991 Pinatubo eruption—a finding that has garnered nearly 200 citations and fundamentally reshaped our understanding of extreme wildfire events. Dr. Chudnovsky has made pivotal contributions to improving satellite-based aerosol optical depth (AOD) retrievals, systematically analyzing how aerosol layering, complex mixing, and cloud cover introduce biases in high-resolution MAIAC and MODIS data. Her work fuses multiple observational platforms—including lidar networks, AERONET, and ground-based monitors—to validate and refine satellite products, directly advancing our ability to monitor air pollution from space. More recently, she has pioneered the first lidar-based vertical profiling of residential wood combustion aerosols in Tirana, Albania, extending her expertise to urban pollution sources. With a publication record spanning from landmark extreme-event analyses to methodological uncertainty studies, Dr. Chudnovsky’s research is essential for scientists and policymakers striving to understand aerosol transport, improve satellite retrievals, and protect public health.