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Atmospheric aerosol profiling with a bistatic imaging lidar system.

John E Barnes¹, N C Parikh Sharma, Trevor B Kaplan

¹NOAA/Earth System Research Laboratory/Global Monitoring Division, Mauna Loa Observatory, Hawaii, 1437 Kilauea Avenue, Hilo, Hawaii 96720. John.E.Barnes@noaa.gov

|May 22, 2007

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Area of Science:

Atmospheric Science
Optical Remote Sensing
Instrumentation

Background:

Atmospheric aerosols significantly impact climate and air quality.
Traditional lidar systems (monostatic) require complex overlap correction and large dynamic range.
Developing simpler, more accurate aerosol profiling techniques is crucial.

Purpose of the Study:

To introduce and validate a novel imaging bistatic lidar system (CLidar) for atmospheric aerosol profiling.
To demonstrate the system's capability for high-resolution altitude measurements.
To compare CLidar measurements with established methods.

Main Methods:

Utilized a ground-based imaging bistatic lidar (CLidar) with a charge-coupled-device camera and wide-angle lens.
Derived geometric altitudes with submeter resolution near the ground.
Conducted nighttime measurements of molecular and aerosol scattering at Mauna Loa Observatory.

Main Results:

The CLidar system achieved submeter altitude resolution without requiring overlap correction.
Measurements of aerosol total scatter showed excellent agreement with a ground-based nephelometer.
The system demonstrated effective profiling of both molecular and aerosol scattering.

Conclusions:

The CLidar system is a viable and simpler alternative to monostatic lidar for atmospheric aerosol profiling.
The instrument provides accurate, high-resolution data comparable to traditional methods.
Further instrument improvements and applications are warranted.