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NO plume mapping by laser-radar techniques.

H Edner, A Sunesson, S Svanberg

|September 12, 2009

Summary

This summary is machine-generated.

Researchers mapped nitrogen oxide (NO) plumes using a mobile differential absorption lidar system. This laser-radar technology achieved range-resolved NO measurements up to 500m with high sensitivity.

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Area of Science:

Environmental Science
Atmospheric Chemistry
Laser Spectroscopy

Background:

Nitrogen oxide (NO) plumes are significant air pollutants.
Accurate mapping and measurement of NO plumes are crucial for environmental monitoring.
Laser-radar techniques offer potential for remote sensing of atmospheric pollutants.

Purpose of the Study:

To demonstrate the capability of a mobile differential absorption lidar system for mapping NO plumes.
To determine the performance characteristics of the lidar system for NO detection.
To provide spectroscopic data for NO analysis.

Main Methods:

Utilized a mobile differential absorption lidar system.
Employed a Nd:YAG-pumped dye laser generating 3-5 mJ pulses at 226 nm with a 1 pm linewidth.
Conducted range-resolved measurements of NO and spectroscopic studies on the gamma(0, 0) bandhead.

Main Results:

Achieved range-resolved NO measurements up to approximately 500 m.
Estimated a detection limit of 3 microg/m³ with a 350 m integration interval.
Determined the differential absorption cross section for NO at 226.8 nm to be (6.6 ± 0.6) x 10⁻²² m².

Conclusions:

The mobile differential absorption lidar system is effective for mapping NO plumes.
The system demonstrates high sensitivity and range resolution for NO detection.
Accurate spectroscopic data were obtained for NO analysis using lidar.