Paper Info
Title
A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases
Abstract
In 2012, we developed a proof-of-concept system for a new open-path laser absorption spectrometer concept for measuring atmospheric CO2. The measurement approach utilizes high-reliability all-fiber-based, continuous-wave laser technology, along with a unique all-digital lock-in amplifier method that, together, enables simultaneous transmission and reception of multiple fixed wavelengths of light. This new technique, which utilizes very little transmitted energy relative to conventional lidar systems, provides high signal-to-noise (SNR) measurements, even in the presence of a large background signal. This proof-of-concept system, tested in both a laboratory environment and a limited number of field experiments over path lengths of 680 m and 1,600 m, demonstrated SNR values >1,000 for received signals of similar to 18 picoWatts averaged over 60 s. A SNR of 1,000 is equivalent to a measurement precision of +/- 0.001 or similar to 0.4 ppmv. The measurement method is expected to provide new capability for automated monitoring of greenhouse gas at fixed sites, such as carbon sequestration facilities, volcanoes, the short-and long-term assessment of urban plumes, and other similar applications. In addition, this concept enables active measurements of column amounts from a geosynchronous orbit for a network of ground-based receivers/stations that would complement other current and planned space-based measurement capabilities.
Year
DOI
Venue
2013
10.3390/rs5126284
REMOTE SENSING
Keywords
Field
DocType
lidar,greenhouse gas,laser absorption spectroscopy
Remote sensing,Spectrometer,Optics,Laser,Geosynchronous orbit,Lidar,Geology,Carbon sequestration,Greenhouse gas,Wavelength,Amplifier
Journal
Volume
Issue
Citations 
5
12
0
PageRank 
References 
Authors
0.34
3
4
Name
Order
Citations
PageRank
jeremy todd dobler100.34
Michael Braun232.20
nathan blume300.34
T. Scott Zaccheo401.01