Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS
Monitoring of CO<sub>2</sub> 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<sub>2</sub> column concentrations. A laser beam was emitted...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/5/1722 |
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| author | Fengxin Xin Jie Li Jinjia Guo Dewang Yang Yong Wang Qiuhua Tang Zhishen Liu |
| author_facet | Fengxin Xin Jie Li Jinjia Guo Dewang Yang Yong Wang Qiuhua Tang Zhishen Liu |
| author_sort | Fengxin Xin |
| collection | DOAJ |
| description | Monitoring of CO<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> column concentration and monitoring carbon emission over large areas. |
| first_indexed | 2024-03-09T05:57:27Z |
| format | Article |
| id | doaj.art-9ded5b6677714e80bebe5578dfa7762f |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T05:57:27Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9ded5b6677714e80bebe5578dfa7762f2023-12-03T12:12:31ZengMDPI AGSensors1424-82202021-03-01215172210.3390/s21051722Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLASFengxin Xin0Jie Li1Jinjia Guo2Dewang Yang3Yong Wang4Qiuhua Tang5Zhishen Liu6Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266100, ChinaOcean Remote Sensing Institute, Ocean University of China, Qingdao 266003, ChinaOcean Remote Sensing Institute, Ocean University of China, Qingdao 266003, ChinaLaser Institute, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266100, ChinaLaser Institute, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266100, ChinaThe First Institute of Oceanography, Ministry of Natural Resources of China, Qingdao 266061, ChinaOcean Remote Sensing Institute, Ocean University of China, Qingdao 266003, ChinaMonitoring of CO<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> column concentration and monitoring carbon emission over large areas.https://www.mdpi.com/1424-8220/21/5/1722carbon dioxidecolumn concentrationTDLASopen-pathcomparative measurement |
| spellingShingle | Fengxin Xin Jie Li Jinjia Guo Dewang Yang Yong Wang Qiuhua Tang Zhishen Liu Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS Sensors carbon dioxide column concentration TDLAS open-path comparative measurement |
| title | Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS |
| title_full | Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS |
| title_fullStr | Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS |
| title_full_unstemmed | Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS |
| title_short | Measurement of Atmospheric CO<sub>2</sub> Column Concentrations Based on Open-Path TDLAS |
| title_sort | measurement of atmospheric co sub 2 sub column concentrations based on open path tdlas |
| topic | carbon dioxide column concentration TDLAS open-path comparative measurement |
| url | https://www.mdpi.com/1424-8220/21/5/1722 |
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