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Measurement of Atmospheric CO 2 Column Concentrations Based on Open-Path TDLAS.
- Source :
- Sensors (14248220); Mar2021, Vol. 21 Issue 5, p1722-1722, 1p
- Publication Year :
- 2021
-
Abstract
- Monitoring of CO<subscript>2</subscript> column concentrations is valuable for atmospheric research. A mobile open-path system was developed based on tunable diode laser absorption spectroscopy (TDLAS) to measure atmospheric CO<subscript>2</subscript> column concentrations. A laser beam was emitted downward from a distributed feedback diode laser at 2 μm and then reflected by the retroreflector array on the ground. We measured the CO<subscript>2</subscript> column concentrations over the 20 and 110 m long vertical path. Several single-point sensors were distributed at different heights to provide comparative measurements for the open-path TDLAS system. The results showed that the minimum detection limit of system was 0.52 ppm. Some similarities were observed in trends from the open-path TDLAS system and these sensors, but the average of these sensors was more consistent with the open-path TDLAS system values than the single-point measurement. These field measurements demonstrate the feasibility of open-path TDLAS for measuring the CO<subscript>2</subscript> column concentration and monitoring carbon emission over large areas. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 21
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Sensors (14248220)
- Publication Type :
- Academic Journal
- Accession number :
- 149295728
- Full Text :
- https://doi.org/10.3390/s21051722