Raman lidar and MPL Measurements during ALIVE

Ferrare, Richard NASA Langley Research Center
Turner, David University of Wisconsin-Madison
Flynn, Connor Pacific Northwest National Laboratory
Petty, Diana Pacific Northwest National Laboratory
Mendoza, Albert Pacific Northwest National Laboratory
Clayton, Marian NASA Langley Research Center
Schmid, Beat Bay Area Environmental Research Institute

Category: Field Campaigns

Analysis of the aerosol and water vapor data collected by the Raman lidar during the May 2003 Aerosol IOP indicated that the sensitivity of the lidar was significantly lower than when the lidar was initially deployed. This decrease in sensitivity contributed to a significant high bias of the Raman lidar aerosol extinction measurements in relation to airborne Sun photometer and in situ measurements. During 2004, the SGP Raman lidar was modified in several ways to increase its sensitivity and improve and/or extend the aerosol extinction and water vapor retrievals. These modifications have resulted in a dramatic improvement in the aerosol and water vapor measurement performance of the CARL system. A major objective of the Aerosol Lidar Validation Experiment (ALIVE), which was conducted during September 2005, was to evaluate the impact of these modifications and upgrades on the SGP Raman lidar measurements of aerosol extinction and optical thickness using airborne data were collected by the NASA Ames Airborne Tracking 14-Channel Sunphotometer (AATS-14) flown aboard the Sky Research Jetstream-31 research aircraft. Another objective was to use the AATS-14 data to evaluate the aerosol extinction profiles derived from the ARM SGP MicroPulse Lidar (MPL). The results of these evaluations will be described in this presentation. We also discuss how the aerosol optical thicknesses (AOT) derived by the Raman lidar and MPL compare with other SGP AOT measurements.

This poster will be displayed at the ARM Science Team Meeting.