Synergies between Aerosol Measurements from Satellites and In-Situ at the Nose Level

VANDERLEI MARTINS, Earth and Space Institute, University of Maryland, Baltimore

     Abstract Number: 786
     Working Group: Plenary Lecture Invited by Conference Chair

Abstract
The detailed measurement of aerosol microphysical properties from space provides unique capability for monitoring global aerosols on a daily basis. Multiple techniques are available spanning from LIDAR profiles to multi-angle, multispectral, and hyperspectral radiances measured in different polarization states. This wide variety of parameters provide multiple independent variables that can be inverted for the detailed inference of aerosol amount (optical thickness), particle size distributions, particle shape parameters, real and imaginary refractive indices, single scattering albedo, etc.

The same multi-angle and polarization techniques used on satellite measurements can also be used for in-situ measurements with a polarized polar nephelometer. The added synergy and advantages in having total column and surface measurements performed simultaneously, with the same technique, will be explored in this talk. In-situ measurements also bring the added advantage of allowing for aerodynamic separation, and for detailed chemical measurements, both of which we want to interpret together with the satellite total column measurements.

In this talk we will show the application of the Generalized Retrieval of Aerosol and Surface Properties (GRASP) inversion algorithm to retrieve aerosol microphysical properties from remote sensing as well as from in situ aerosol measurements. Specific results include laboratory measurements with different aerosol types, results from past field campaigns, remote sensing results from the HARP CubeSat and from the ADLER-2/GAPMAP satellites, as well as future measurements with the HARP2 sensor on the NASA PACE observatory. In particular, we will show results from two years of HARP CubeSat data collected around the globe, and results from the current GAPMAP sensor, which is still on Earth’s orbit, including aerosol retrievals over dust and biomass burning smoke. In situ results will be discussed from multiple versions of integrating nephelometers, from the Polarized Imaging Nephelometer, and from the newly developed IMAP instrument, all measuring the optical and microphysical properties of aerosols.