Lidar for Monitoring Dust Particle Orientation

Lidar for Monitoring Dust Particle Orientation

Webinar Speaker: Alexandra Tsekeri, National Observatory of Athens, IAASARS

About the Webinar

Dust orientation is an ongoing investigation in recent years. Its potential proof will be a paradigm shift for dust remote sensing, invalidating the currently used simplifications of randomly-oriented particles. Vertically-resolved measurements of dust orientation can be acquired with a polarization lidar designed to target the off-diagonal elements of the backscatter matrix which are non-zero only when the particles are oriented. We constructed the “WALL-E” lidar system emitting linear and elliptical polarized light and detecting various states of polarization of the backscattered light. Herein we present measurements of oriented rain and ice particles acquired in Athens, Greece, and first dust orientation measurements acquired during the ESA Campaign “ASKOS” at Minelo, Cabo Verde, in June 2022.

About the Speaker

Alexandra is born in Ioannina, Greece, in 1981. She studied Environmental Engineering at the Environmental Engineering Department of the Polytechnic School of the Democretus University of Thrace and received her degree in 2004. She obtained her Ph.D. in the field of Remote Sensing at the Department of Earth and Environmental Sciences of the Graduate School and University Center, The City University of New York in 2011. She is employed as a postdoctoral researcher at the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing of the National Observatory of Athens (IAASARS-NOA) since 2011. Her research focuses on aerosol characterization using passive and active remote sensing techniques with focus on polarimetric data.