Measuring CH4 and CO2 with New Generation High-Precision Low-Power Low-Maintenance Closed-Path Analyzers: Lab and Field Results
Abstract
By 2017, a new lightweight high-precision closed-path technology was developed with the goal of allowing the WMO-quality measurements of CH4, CO2 and other gases with a time response of about 1 Hz, the power consumption of about 20 W, with very minimal maintenance and calibration requirements, and with a relatively low cost.
In 2018, this technology resulted in the development of the first two new models of high-precision gas analyzers, for CH4 and CO2 respectively. Both models can enable the multitude of methods and approaches including the following: - Approaches relying on very high precision CH4 or CO2 concentrations, encompassing those often employed by WMO-GAW and EPA communities, such as a family of the Inverse Flux Methods, Lagrangian Modeling, Mass Balance Method, Fence-Line Monitoring, etc. - Chamber Flux measurements, including both CH4 and CO2 from the same CH4-CO2-H2O gas analyzer. - Distributed Sensors techniques being currently developed for Megacities and Green Cities projects. - Mobile monitoring, including measurements from various moving platforms. This presentation will describe key instrument principles and elements of the design, and show first laboratory, long-term and field results on CH4 and on CO2 from a new high-precision low-power CH4-CO2-H2O gas analyzer (e.g., LI-7810), and CO2 results from a new high-precision low-power CO2-H2O analyzer (e.g., LI-7815).- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.B21J2455M
- Keywords:
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- 0428 Carbon cycling;
- BIOGEOSCIENCESDE: 1615 Biogeochemical cycles;
- processes;
- and modeling;
- GLOBAL CHANGEDE: 6309 Decision making under uncertainty;
- POLICY SCIENCESDE: 6620 Science policy;
- PUBLIC ISSUES