Combined active-passive remote sensing of aerosol optical properties

Michael Pitts; Chris Hostetler; John Hair; Rich Ferrare; Jeng-Hwa Yee

doi:10.1117/12.578918

30 December 2004 Combined active-passive remote sensing of aerosol optical properties

Michael Pitts, Chris Hostetler, John Hair, Rich Ferrare, Jeng-Hwa Yee

Proceedings Volume 5660, Instruments, Science, and Methods for Geospace and Planetary Remote Sensing; (2004) https://doi.org/10.1117/12.578918
Event: Fourth International Asia-Pacific Environmental Remote Sensing Symposium 2004: Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2004, Honolulu, Hawai'i, United States

Abstract

Recent assessments of global climate change conclude that the radiative effect of aerosols is one of the largest uncertainties in our ability to predict future climate change. A myriad of new sensors and satellite missions are being designed to address this major question confronting credible prediction of climate change. The NASA Langley Airborne A-Band Spectrometer (LAABS) is a recently developed aircraft instrument that provides high spectral resolution (~0.03 nm) radiance measurements of reflected sunlight over the oxygen A-band spectral region centered near 765 nm. High resolution O₂ A-band spectrometry of reflected sunlight is a promising new approach for remote sensing of aerosol and cloud optical properties. While the LAABS instrument provides valuable data on a stand-alone basis, greater scientific return may be realized by combining the A-band spectra with coincident lidar measurements that supply additional information on the vertical distribution of the aerosol. In particular, an instrument suite that combines LAABS with the new airborne High Spectral Resolution Lidar (HSRL) has the potential to provide a comprehensive suite of aerosol and cloud optical property measurements never before achieved. In this paper, we investigate the combined use of LAABS and HSRL measurements to infer aerosol single scatter albedo. We explore the information content of the O₂ A-band reflectance spectra and, in particular, the advantages offered by high resolution A-band spectrometers such as LAABS. The approach for combined LAABS/HSRL retrievals is described and results from simulation studies are presented to illustrate their potential for retrieval of single scatter albedo.

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Michael Pitts, Chris Hostetler, John Hair, Rich Ferrare, and Jeng-Hwa Yee "Combined active-passive remote sensing of aerosol optical properties", Proc. SPIE 5660, Instruments, Science, and Methods for Geospace and Planetary Remote Sensing, (30 December 2004); https://doi.org/10.1117/12.578918

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KEYWORDS

Aerosols

Oxygen

Spectral resolution

Spectroscopy

Clouds

LIDAR

Optical properties

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