GreenLITE: a new laser-based tool for near-real-time monitoring and mapping of CO2 and CH4 concentrations on scales from 0.04-25 km2

Jeremy T. Dobler; Timothy G. Pernini; Nathan Blume; T. Scott Zaccheo; Michael Braun

doi:10.1117/12.2276950

30 August 2017 GreenLITE: a new laser-based tool for near-real-time monitoring and mapping of CO₂ and CH₄ concentrations on scales from 0.04-25 km²

Jeremy T. Dobler, Timothy G. Pernini, Nathan Blume, T. Scott Zaccheo, Michael Braun

Author Affiliations +

Proceedings Volume 10406, Lidar Remote Sensing for Environmental Monitoring 2017; 1040604 (2017) https://doi.org/10.1117/12.2276950
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

In 2013, Harris and Atmospheric and Environmental Research developed the greenhouse gas laser imaging tomography experiment (GreenLITE™) under a cooperative agreement with the National Energy Technology Laboratory of the Department of Energy. The system uses a pair of high-precision, intensity-modulated, continuous-wave (IMCW) transceivers and a series of retroreflectors to generate overlapping atmospheric density measurements from absorption of a particular greenhouse gas (e.g. CO₂ or CH₄), to provide an estimate of the two-dimensional spatial distribution of the gas within the area of interest. The system can take measurements over areas ranging from approximately 0.04 square kilometers (km²) to 25 km² (~200 meters (m) × 200 m, up to ~5 km × 5 km). Multiple GreenLITE™ CO₂ demonstrations have been carried out to date, including a full year, November 04, 2015 through November 14, 2016, deployment over a 25 km² area of downtown Paris, France. In late 2016, the GreenLITE™ system was converted to provide similar measurements for CH₄. Recent experiments showed that GreenLITE™ CH₄ concentration readings correlated with an insitu instrument, calibrated with World Meteorological Organization traceable gas purchased from the NOAA Earth Systems Research Laboratory, to within approximately 0.5% of CH₄ background or ~10-15 parts per billion. Several experiments are planned in 2017 to further evaluate the accuracy of the CH₄ and CO₂ retrieved concentration values compared to the calibrated in situ instrument and to demonstrate the feasibility of GreenLITE™ for environmental and safety monitoring of _CO2and CH₄ in industrial applications.

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Jeremy T. Dobler, Timothy G. Pernini, Nathan Blume, T. Scott Zaccheo, and Michael Braun "GreenLITE: a new laser-based tool for near-real-time monitoring and mapping of CO₂ and CH₄ concentrations on scales from 0.04-25 km²", Proc. SPIE 10406, Lidar Remote Sensing for Environmental Monitoring 2017, 1040604 (30 August 2017); https://doi.org/10.1117/12.2276950

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