613 Seminar: J. Vanderlei Martins


The hyper-angular observations of aerosol and cloud particles from in-situ and remote sensing observations can provided many insights on their microphysical properties. We have recently developed at UMBC the Polarized Imaging Nephelometer (PI-Neph) instrument that can measure the P11 and P12 elements of the aerosol phase matrix in over 100 angles from ~3 to ~177 degs, in up to 3 wavelengths inside the instrument chamber.  The instrument chamber allows for special conditioning of the sample including drying and humidifying the samples.  Similarly, the Open-Imaging Nephelometer (O-Ineph) can measure the phase function of undisturbed aerosol and cloud particles in an open volume of air, in ambient conditions. The PI-Neph instrument has flown in multiple aircraft campaigns and has participated in several ground based experiments.  Direct measurements of P11 and P12, as well as the inverted microphysical properties of aerosols derived from these measurements will be discussed and compared with other techniques including AERONET and in-situ measurements.  Complementary spectral absorption measurements have also been performed for multiple samples including urban pollution, biomass burning, volcano samples, dust, etc.

An extension of the in situ hyper-angular scattering measurements is the next generation of hyper-angular polarized observations that are being proposed from space for the ACE and PACE missions.  These concepts will be presented here as well as an update on the HARP (Hyper-Angular Rainbow Polarimeter) CubeSat mission expected to be launched in 2016, and on the proposed CLAIM-3D (Cloud and Aerosol Interaction Measurements in 3D) development.

Seminar Series Coordinators: