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Ina Mattis is a leading atmospheric scientist whose pioneering work with Raman lidar systems has fundamentally advanced our understanding of aerosol vertical profiling. Her research focuses on aerosol optical properties, particularly lidar ratios and Ångström exponents, which are critical for climate modeling and air quality studies. Her most influential paper, "Aerosol‐type‐dependent lidar ratios observed with Raman lidar" (2007, 697 citations), provided the first comprehensive statistics on lidar ratios for climatically significant aerosol types across Europe, Asia, and Africa. Mattis made landmark contributions to volcanic ash monitoring, developing a combined lidar-photometer method that enabled the first retrieval of vertical ash mass concentration profiles during the 2010 Eyjafjallajökull eruptions (233 citations). She also documented extreme stratospheric smoke events, reporting light extinction coefficients 20 times higher than post-Pinatubo levels from Canadian wildfires in 2017 (190 citations). As a key contributor to EARLINET, Europe's aerosol research lidar network, Mattis has advanced dual-wavelength Raman lidar techniques and combined lidar-sun photometer observations for Saharan dust characterization. Her work has been instrumental in establishing operational standards for aerosol remote sensing and improving our ability to track long-range transport of dust, smoke, and volcanic particles.