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Proceedings Paper

Aerosol lidar and MODIS satellite comparisons for future aerosol loading forecast
Author(s): Russell De Young; James Szykman; Kurt Severance; D. Allen Chu; Rebecca Rosen; Jassim Al-Saadi
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Paper Abstract

Knowledge of the concentration and distribution of atmospheric aerosols using both airborne lidar and satellite instruments is a field of active research. An aircraft based aerosol lidar has been used to study the distribution of atmospheric aerosols in the California Central Valley and eastern US coast. Concurrently, satellite aerosol retrievals, from the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument aboard the Terra and Aqua satellites, were take over the Central Valley. The MODIS Level 2 aerosol data product provides retrieved ambient aerosol optical properties (e.g., optical depth (AOD) and size distribution) globally over ocean and land at a spatial resolution of 10 km. The Central Valley topography was overlaid with MODIS AOD (5x5 km2 resolution) and the aerosol scattering vertical profiles from a lidar flight. Backward air parcel trajectories for the lidar data show that air from the Pacific and northern part of the Central Valley converge confining the aerosols to the lower valley region and below the mixed layer. Below an altitude of 1 km, the lidar aerosol and MODIS AOD exhibit good agreement. Both data sets indicate a high presence of aerosols near Bakersfield and the Tehachapi Mountains. These and other results to be presented indicate that the majority of the aerosols are below the mixed layer such that the MODIS AOD should correspond well with surface measurements. Lidar measurements will help interpret satellite AOD retrievals so that one day they can be used on a routine basis for prediction of boundary layer aerosol pollution events.

Paper Details

Date Published: 1 September 2006
PDF: 8 pages
Proc. SPIE 6299, Remote Sensing of Aerosol and Chemical Gases, Model Simulation/Assimilation, and Applications to Air Quality, 629905 (1 September 2006); doi: 10.1117/12.680587
Show Author Affiliations
Russell De Young, NASA Langley Research Ctr. (United States)
James Szykman, U.S. Environmental Protection Agency (United States)
Kurt Severance, NASA Langley Research Ctr. (United States)
D. Allen Chu, NASA Goddard Space Flight Ctr. (United States)
Rebecca Rosen, U.S. Environmental Protection Agency (United States)
Jassim Al-Saadi, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 6299:
Remote Sensing of Aerosol and Chemical Gases, Model Simulation/Assimilation, and Applications to Air Quality
Allen Chu; James Szykman; Shobha Kondragunta, Editor(s)

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