Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic c...
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European Geosciences Union
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/25916 2023-05-15T14:25:11+02:00 Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska Eugster, Werner Laundre, James A. Eugster, Jon Kling, George W. 2020-05-27 https://hdl.handle.net/1912/25916 unknown European Geosciences Union https://doi.org/10.5194/amt-13-2681-2020 Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. (2020). Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), 2681-2695. https://hdl.handle.net/1912/25916 doi:10.5194/amt-13-2681-2020 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. (2020). Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), 2681-2695. doi:10.5194/amt-13-2681-2020 Article 2020 ftwhoas https://doi.org/10.5194/amt-13-2681-2020 2022-05-28T23:03:43Z © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), (2020): 2681-2695, doi:10.5194/amt-13-2681-2020. The TGS 2600 was the first low-cost solid-state sensor that shows a response to ambient levels of CH4 (e.g., range ≈1.8–2.7 µmol mol−1). Here we present an empirical function to correct the TGS 2600 signal for temperature and (absolute) humidity effects and address the long-term reliability of two identical sensors deployed from 2012 to 2018. We assess the performance of the sensors at 30 min resolution and aggregated to weekly medians. Over the entire period the agreement between TGS-derived and reference CH4 mole fractions measured by a high-precision Los Gatos Research instrument was R2=0.42, with better results during summer (R2=0.65 in summer 2012). Using absolute instead of relative humidity for the correction of the TGS 2600 sensor signals reduced the typical deviation from the reference to less than ±0.1 µmol mol−1 over the full range of temperatures from −41 to 27 ∘C. At weekly resolution the two sensors showed a downward drift of signal voltages indicating that after 10–13 years a TGS 2600 may have reached its end of life. While the true trend in CH4 mole fractions measured by the high-quality reference instrument was 10.1 nmolmol−1yr−1 (2012–2018), part of the downward trend in sensor signal (ca. 40 %–60 %) may be due to the increase in CH4 mole fraction because the sensor voltage decreases with increasing CH4 mole fraction. Weekly median diel cycles tend to agree surprisingly well between the TGS 2600 and reference measurements during the snow-free season, but in winter the agreement is lower. We suggest developing separate functions for deducing CH4 mole fractions from TGS 2600 ... Article in Journal/Newspaper Arctic Arctic Alaska Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Atmospheric Measurement Techniques 13 5 2681 2695 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), (2020): 2681-2695, doi:10.5194/amt-13-2681-2020. The TGS 2600 was the first low-cost solid-state sensor that shows a response to ambient levels of CH4 (e.g., range ≈1.8–2.7 µmol mol−1). Here we present an empirical function to correct the TGS 2600 signal for temperature and (absolute) humidity effects and address the long-term reliability of two identical sensors deployed from 2012 to 2018. We assess the performance of the sensors at 30 min resolution and aggregated to weekly medians. Over the entire period the agreement between TGS-derived and reference CH4 mole fractions measured by a high-precision Los Gatos Research instrument was R2=0.42, with better results during summer (R2=0.65 in summer 2012). Using absolute instead of relative humidity for the correction of the TGS 2600 sensor signals reduced the typical deviation from the reference to less than ±0.1 µmol mol−1 over the full range of temperatures from −41 to 27 ∘C. At weekly resolution the two sensors showed a downward drift of signal voltages indicating that after 10–13 years a TGS 2600 may have reached its end of life. While the true trend in CH4 mole fractions measured by the high-quality reference instrument was 10.1 nmolmol−1yr−1 (2012–2018), part of the downward trend in sensor signal (ca. 40 %–60 %) may be due to the increase in CH4 mole fraction because the sensor voltage decreases with increasing CH4 mole fraction. Weekly median diel cycles tend to agree surprisingly well between the TGS 2600 and reference measurements during the snow-free season, but in winter the agreement is lower. We suggest developing separate functions for deducing CH4 mole fractions from TGS 2600 ... |
format |
Article in Journal/Newspaper |
author |
Eugster, Werner Laundre, James A. Eugster, Jon Kling, George W. |
spellingShingle |
Eugster, Werner Laundre, James A. Eugster, Jon Kling, George W. Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
author_facet |
Eugster, Werner Laundre, James A. Eugster, Jon Kling, George W. |
author_sort |
Eugster, Werner |
title |
Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
title_short |
Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
title_full |
Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
title_fullStr |
Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
title_full_unstemmed |
Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska |
title_sort |
long-term reliability of the figaro tgs 2600 solid-state methane sensor under low-arctic conditions at toolik lake, alaska |
publisher |
European Geosciences Union |
publishDate |
2020 |
url |
https://hdl.handle.net/1912/25916 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Alaska |
genre_facet |
Arctic Arctic Alaska |
op_source |
Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. (2020). Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), 2681-2695. doi:10.5194/amt-13-2681-2020 |
op_relation |
https://doi.org/10.5194/amt-13-2681-2020 Eugster, W., Laundre, J., Eugster, J., & Kling, G. W. (2020). Long-term reliability of the figaro TGS 2600 solid-state methane sensor under low-Arctic conditions at Toolik Lake, Alaska. Atmospheric Measurement Techniques, 13(5), 2681-2695. https://hdl.handle.net/1912/25916 doi:10.5194/amt-13-2681-2020 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/amt-13-2681-2020 |
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Atmospheric Measurement Techniques |
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13 |
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5 |
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2681 |
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2695 |
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