title: UV polarization lidar for remote sensing new particles formation in the atmosphere.
abstract: Understanding new particles formation in the free troposphere is key for air quality and climate change, but requires accurate observation tools. Here, we discuss on the optical requirements ensuring a backscattering device, such as a lidar, to remotely observe nucleation events promoted by nonspherical desert dust or volcanic ash particles. By applying the Mie theory and the T-matrix code, we numerically simulated the backscattering coefficient of spherical freshly nucleated particles and nonspherical particles. We hence showed that, to remotely observe such nucleation events with an elastic lidar device, it should operate in the UV spectral range and be polarization-resolved. Two atmospheric case studies are proposed, on nucleation events promoted by desert dust, or volcanic ash particles. This optical pathway might be useful for climate, geophysical and fundamental purposes, by providing a range-resolved remote observation of nucleation events.
authors.forename: Grégory
authors.initials: G
authors.lastname: David
authors.forename: Benjamin
authors.initials: B
authors.lastname: Thomas
authors.forename: Yoan
authors.initials: Y
authors.lastname: Dupart
authors.forename: Barbara
authors.initials: B
authors.lastname: D'Anna
authors.forename: Christian
authors.initials: C
authors.lastname: George
authors.forename: Alain
authors.initials: A
authors.lastname: Miffre
authors.forename: Patrick
authors.initials: P
authors.lastname: Rairoux