High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples
The record of past greenhouse gas composition from ice cores is crucial for our understanding of global climate change. Future ice core projects will aim to extend both the temporal coverage (extending the timescale to 1.5 Myr) and the temporal resolution of existing records. This implies a strongly...
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Online Access: | https://boris.unibe.ch/148603/1/bereiter20amt_deepSLiceQCLAS.pdf https://boris.unibe.ch/148603/ https://amt.copernicus.org/articles/13/6391/2020/ |
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ftunivbern:oai:boris.unibe.ch:148603 2023-08-20T04:07:11+02:00 High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples Bereiter, Bernhard Tuzson, Béla Scheidegger, Philipp Kupferschmid, André Looser, Herbert Mächler, Lars Baggenstos, Daniel Schmitt, Jochen Fischer, Hubertus Emmenegger, Lukas 2020 application/pdf https://boris.unibe.ch/148603/1/bereiter20amt_deepSLiceQCLAS.pdf https://boris.unibe.ch/148603/ https://amt.copernicus.org/articles/13/6391/2020/ eng eng Copernicus Publications https://boris.unibe.ch/148603/ info:eu-repo/semantics/openAccess Bereiter, Bernhard; Tuzson, Béla; Scheidegger, Philipp; Kupferschmid, André; Looser, Herbert; Mächler, Lars; Baggenstos, Daniel; Schmitt, Jochen; Fischer, Hubertus; Emmenegger, Lukas (2020). High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples. Atmospheric Measurement Techniques, 13(11), pp. 6391-6406. Copernicus Publications 10.5194/amt-13-6391-2020 <http://dx.doi.org/10.5194/amt-13-6391-2020> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2020 ftunivbern https://doi.org/10.5194/amt-13-6391-2020 2023-07-31T22:02:49Z The record of past greenhouse gas composition from ice cores is crucial for our understanding of global climate change. Future ice core projects will aim to extend both the temporal coverage (extending the timescale to 1.5 Myr) and the temporal resolution of existing records. This implies a strongly limited sample availability, increasing demands on analytical accuracy and precision, and the need to reuse air samples extracted from ice cores for multiple gas analyses. To meet these requirements, we designed and developed a new analytical system that combines direct absorption laser spectroscopy in the mid-infrared (mid-IR) with a quantitative sublimation extraction method. Here, we focus on a high-precision dual-laser spectrometer for the simultaneous measurement of CH4, N2O, and CO2 concentrations, as well as d13C(CO2). Flow-through experiments at 5 mbar gas pressure demonstrate an analytical precision (1 sigma) of 0.006 ppm for CO2, 0.02‰ for d13C(CO2), 0.4 ppb for CH4, and 0.1 ppb for N2O, obtained after an integration time of 100 s. Sample–standard repeatabilities (1 sigma) of discrete samples of 1 mL STP (Standard Temperature and Pressure) amount to 0.03 ppm, 2.2 ppb, 1 ppb, and 0.04‰ for CO2, CH4, N2O, and d13C(CO2), respectively. The key elements to achieve this performance are a custom-developed multipass absorption cell, custom-made high-performance data acquisition and laser driving electronics, and a robust calibration approach involving multiple reference gases. The assessment of the spectrometer capabilities in repeated measurement cycles of discrete air samples – mimicking the procedure for external samples such as air samples from ice cores – was found to fully meet our performance criteria for future ice core analysis. Finally, this non-consumptive method allows the reuse of the precious gas samples for further analysis, which creates new opportunities in ice core science. Article in Journal/Newspaper ice core BORIS (Bern Open Repository and Information System, University of Bern) Atmospheric Measurement Techniques 13 11 6391 6406 |
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Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Bereiter, Bernhard Tuzson, Béla Scheidegger, Philipp Kupferschmid, André Looser, Herbert Mächler, Lars Baggenstos, Daniel Schmitt, Jochen Fischer, Hubertus Emmenegger, Lukas High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
topic_facet |
530 Physics |
description |
The record of past greenhouse gas composition from ice cores is crucial for our understanding of global climate change. Future ice core projects will aim to extend both the temporal coverage (extending the timescale to 1.5 Myr) and the temporal resolution of existing records. This implies a strongly limited sample availability, increasing demands on analytical accuracy and precision, and the need to reuse air samples extracted from ice cores for multiple gas analyses. To meet these requirements, we designed and developed a new analytical system that combines direct absorption laser spectroscopy in the mid-infrared (mid-IR) with a quantitative sublimation extraction method. Here, we focus on a high-precision dual-laser spectrometer for the simultaneous measurement of CH4, N2O, and CO2 concentrations, as well as d13C(CO2). Flow-through experiments at 5 mbar gas pressure demonstrate an analytical precision (1 sigma) of 0.006 ppm for CO2, 0.02‰ for d13C(CO2), 0.4 ppb for CH4, and 0.1 ppb for N2O, obtained after an integration time of 100 s. Sample–standard repeatabilities (1 sigma) of discrete samples of 1 mL STP (Standard Temperature and Pressure) amount to 0.03 ppm, 2.2 ppb, 1 ppb, and 0.04‰ for CO2, CH4, N2O, and d13C(CO2), respectively. The key elements to achieve this performance are a custom-developed multipass absorption cell, custom-made high-performance data acquisition and laser driving electronics, and a robust calibration approach involving multiple reference gases. The assessment of the spectrometer capabilities in repeated measurement cycles of discrete air samples – mimicking the procedure for external samples such as air samples from ice cores – was found to fully meet our performance criteria for future ice core analysis. Finally, this non-consumptive method allows the reuse of the precious gas samples for further analysis, which creates new opportunities in ice core science. |
format |
Article in Journal/Newspaper |
author |
Bereiter, Bernhard Tuzson, Béla Scheidegger, Philipp Kupferschmid, André Looser, Herbert Mächler, Lars Baggenstos, Daniel Schmitt, Jochen Fischer, Hubertus Emmenegger, Lukas |
author_facet |
Bereiter, Bernhard Tuzson, Béla Scheidegger, Philipp Kupferschmid, André Looser, Herbert Mächler, Lars Baggenstos, Daniel Schmitt, Jochen Fischer, Hubertus Emmenegger, Lukas |
author_sort |
Bereiter, Bernhard |
title |
High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
title_short |
High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
title_full |
High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
title_fullStr |
High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
title_full_unstemmed |
High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples |
title_sort |
high-precision laser spectrometer for multiple greenhouse gas analysis in 1 ml air from ice core samples |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://boris.unibe.ch/148603/1/bereiter20amt_deepSLiceQCLAS.pdf https://boris.unibe.ch/148603/ https://amt.copernicus.org/articles/13/6391/2020/ |
genre |
ice core |
genre_facet |
ice core |
op_source |
Bereiter, Bernhard; Tuzson, Béla; Scheidegger, Philipp; Kupferschmid, André; Looser, Herbert; Mächler, Lars; Baggenstos, Daniel; Schmitt, Jochen; Fischer, Hubertus; Emmenegger, Lukas (2020). High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples. Atmospheric Measurement Techniques, 13(11), pp. 6391-6406. Copernicus Publications 10.5194/amt-13-6391-2020 <http://dx.doi.org/10.5194/amt-13-6391-2020> |
op_relation |
https://boris.unibe.ch/148603/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-13-6391-2020 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
13 |
container_issue |
11 |
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6391 |
op_container_end_page |
6406 |
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1774718653581754368 |