UMBC logo
UMBC Department of Physics
News & Events

About

This page contains a single entry from the blog posted on August 12, 2013 10:00 AM.

The previous post in this blog was Seminar: Wednesday, May 8, 2013 at 3:30 pm.

The next post in this blog is Seminar: Wednesday, Sept. 18, 2013 at 3:30 pm.

Many more can be found on the main index page or by looking through the archives.

Powered by
Movable Type 3.34

« Seminar: Wednesday, May 8, 2013 at 3:30 pm | Main | Seminar: Wednesday, Sept. 18, 2013 at 3:30 pm »

PhD Defense - Patricia Sawamura

Patricia successfully defended her dissertation on August 12, 2013.

TITLE:
Retrieval of optical and microphysical properties of aerosols from a hybrid lidar dataset

ABSTRACT:
Over the past decade the development of inversion techniques for the retrievals of aerosol microphysical properties (e.g. effective radius, volume and surface-area concentrations) and aerosol optical properties (e.g. complex index of refraction and single scattering albedo) from multiwavelength lidar system brought a new perspective in the study of the vertical distribution of aerosols. In this study retrievals of such parameters were obtained from a hybrid multiwavelength lidar dataset for the first time. In July of 2011, in the Baltimore-Washington DC region, synergistic profiling of optical and microphysical properties of aerosols with both airborne in-situ and ground-based remote sensing systems was performed during the first deployment of DISCOVER-AQ. The hybrid multiwavelength lidar dataset combines elastic ground-based measurements at 355 nm with airborne High Spectral Resolution Lidar (HSRL) measurements at 532 nm and elastic measurements at 1064 nm that were obtained up to 5 km apart of each other. This was the first study in which optical and microphysical retrievals from lidar were obtained during the day and directly compared to AERONET and in-situ measurements. Good agreement was observed between lidar and AERONET retrievals. Larger discrepancies were observed between lidar retrievals and in-situ measurements obtained by the aircraft and aerosol hydration processes that were not taken into account in the study are believed to be the cause for the discrepancies observed.

UMBC's Department of Physics   |   410-455-2513 or 1-877-707-1969 (toll free)   |   physics@umbc.edu  |  Site Info