Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O
We describe the characteristics and performances of our newly built broadband cavity-enhanced absorption spectrometer for measurements of nitrate radical ( NO 3 ), nitrogen dioxide ( NO 2 ), and water vapor ( H 2 O ). A customized vibration-resistance cavity layout incorporated with N 2 purging on h...
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ftcopernicus:oai:publications.copernicus.org:egusphere102379 2023-05-15T15:12:04+02:00 Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O Nam, Woohui Cho, Changmin Perdigones, Begie Rhee, Tae Siek Min, Kyung-Eun 2022-08-03 application/pdf https://doi.org/10.5194/egusphere-2022-145 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-145/ eng eng doi:10.5194/egusphere-2022-145 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-145/ eISSN: Text 2022 ftcopernicus https://doi.org/10.5194/egusphere-2022-145 2022-08-08T16:22:56Z We describe the characteristics and performances of our newly built broadband cavity-enhanced absorption spectrometer for measurements of nitrate radical ( NO 3 ), nitrogen dioxide ( NO 2 ), and water vapor ( H 2 O ). A customized vibration-resistance cavity layout incorporated with N 2 purging on high-reflection mirror surfaces was implemented with a red light-emitting diode (LED) as a light source. In general, this system achieved over 40 km (up to 101.5 km) of effective light path length at 662 nm from a 0.52 m long cavity. For accurate NO 3 measurement, the measured absorption spectrum of H 2 O was used for simultaneous concentration retrievals with the other species instead of being treated as interferences to be removed or corrected prior to NO 3 detection. Synthesized N 2 O 5 crystals under atmospheric pressure were used for performance tests of linear response and transmission efficiency. From the standard injection experiments of NO 3 , NO 2 , and H 2 O , high linearities were observed ( R 2 ≥0.9918 ). The total NO 3 transmission efficiency through the system was determined to be 81.2 % ( ±2.9 , 1 σ ) within the residence time of 2.59 s. The precisions (1 σ ) of NO 3 , NO 2 , and H 2 O in 1 Hz measurement from a single pixel on the charge-coupled device (CCD) were 1.41 pptv, 6.92 ppbv, and 35.0 ppmv with uncertainties of 10.8 %, 5.2 %, and ≥20.5 %, respectively, mainly from the errors in the literature absorption cross-section. The instrument was successfully deployed aboard the Korean icebreaker R/V Araon for an expedition conducted in the remote marine boundary layer in the Arctic Ocean during the summer of 2021. Text Arctic Arctic Ocean Copernicus Publications: E-Journals Arctic Arctic Ocean |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
We describe the characteristics and performances of our newly built broadband cavity-enhanced absorption spectrometer for measurements of nitrate radical ( NO 3 ), nitrogen dioxide ( NO 2 ), and water vapor ( H 2 O ). A customized vibration-resistance cavity layout incorporated with N 2 purging on high-reflection mirror surfaces was implemented with a red light-emitting diode (LED) as a light source. In general, this system achieved over 40 km (up to 101.5 km) of effective light path length at 662 nm from a 0.52 m long cavity. For accurate NO 3 measurement, the measured absorption spectrum of H 2 O was used for simultaneous concentration retrievals with the other species instead of being treated as interferences to be removed or corrected prior to NO 3 detection. Synthesized N 2 O 5 crystals under atmospheric pressure were used for performance tests of linear response and transmission efficiency. From the standard injection experiments of NO 3 , NO 2 , and H 2 O , high linearities were observed ( R 2 ≥0.9918 ). The total NO 3 transmission efficiency through the system was determined to be 81.2 % ( ±2.9 , 1 σ ) within the residence time of 2.59 s. The precisions (1 σ ) of NO 3 , NO 2 , and H 2 O in 1 Hz measurement from a single pixel on the charge-coupled device (CCD) were 1.41 pptv, 6.92 ppbv, and 35.0 ppmv with uncertainties of 10.8 %, 5.2 %, and ≥20.5 %, respectively, mainly from the errors in the literature absorption cross-section. The instrument was successfully deployed aboard the Korean icebreaker R/V Araon for an expedition conducted in the remote marine boundary layer in the Arctic Ocean during the summer of 2021. |
format |
Text |
author |
Nam, Woohui Cho, Changmin Perdigones, Begie Rhee, Tae Siek Min, Kyung-Eun |
spellingShingle |
Nam, Woohui Cho, Changmin Perdigones, Begie Rhee, Tae Siek Min, Kyung-Eun Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
author_facet |
Nam, Woohui Cho, Changmin Perdigones, Begie Rhee, Tae Siek Min, Kyung-Eun |
author_sort |
Nam, Woohui |
title |
Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
title_short |
Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
title_full |
Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
title_fullStr |
Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
title_full_unstemmed |
Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O |
title_sort |
development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient no3, no2, and h2o |
publishDate |
2022 |
url |
https://doi.org/10.5194/egusphere-2022-145 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-145/ |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2022-145 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-145/ |
op_doi |
https://doi.org/10.5194/egusphere-2022-145 |
_version_ |
1766342812221046784 |