The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry
Solar absorption spectroscopy in the near infrared has been performed in Ny-Ålesund (78.9° N, 11.9° E) since 2002; however, due to the high latitude of the site, the sun is below the horizon from October to March (polar night) and no solar absorption measurements are possible. Here we present a nove...
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ftcopernicus:oai:publications.copernicus.org:amt57278 2023-05-15T15:06:29+02:00 The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry Buschmann, Matthias Deutscher, Nicholas M. Palm, Mathias Warneke, Thorsten Weinzierl, Christine Notholt, Justus 2018-09-20 application/pdf https://doi.org/10.5194/amt-10-2397-2017 https://amt.copernicus.org/articles/10/2397/2017/ eng eng doi:10.5194/amt-10-2397-2017 https://amt.copernicus.org/articles/10/2397/2017/ eISSN: 1867-8548 Text 2018 ftcopernicus https://doi.org/10.5194/amt-10-2397-2017 2020-07-20T16:23:41Z Solar absorption spectroscopy in the near infrared has been performed in Ny-Ålesund (78.9° N, 11.9° E) since 2002; however, due to the high latitude of the site, the sun is below the horizon from October to March (polar night) and no solar absorption measurements are possible. Here we present a novel method of retrieving the total column dry-air mole fractions (DMFs) of CO 2 and CH 4 using moonlight in winter. Measurements have been taken during the polar nights from 2012 to 2016 and are validated with TCCON (Total Carbon Column Observing Network) measurements by solar and lunar absorption measurements on consecutive days and nights during spring and autumn. The complete seasonal cycle of the DMFs of CO 2 and CH 4 is presented and a precision of up to 0.5 % is achieved. A comparison of solar and lunar measurements on consecutive days during day and night in March 2013 yields non-significant biases of 0. 66 ± 4. 56 ppm for xCO 2 and −1. 94 ± 20. 63 ppb for xCH 4 . Additionally a model comparison has been performed with data from various reanalysis models. Text Arctic Ny Ålesund Ny-Ålesund polar night Copernicus Publications: E-Journals Arctic Ny-Ålesund Atmospheric Measurement Techniques 10 7 2397 2411 |
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Copernicus Publications: E-Journals |
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English |
description |
Solar absorption spectroscopy in the near infrared has been performed in Ny-Ålesund (78.9° N, 11.9° E) since 2002; however, due to the high latitude of the site, the sun is below the horizon from October to March (polar night) and no solar absorption measurements are possible. Here we present a novel method of retrieving the total column dry-air mole fractions (DMFs) of CO 2 and CH 4 using moonlight in winter. Measurements have been taken during the polar nights from 2012 to 2016 and are validated with TCCON (Total Carbon Column Observing Network) measurements by solar and lunar absorption measurements on consecutive days and nights during spring and autumn. The complete seasonal cycle of the DMFs of CO 2 and CH 4 is presented and a precision of up to 0.5 % is achieved. A comparison of solar and lunar measurements on consecutive days during day and night in March 2013 yields non-significant biases of 0. 66 ± 4. 56 ppm for xCO 2 and −1. 94 ± 20. 63 ppb for xCH 4 . Additionally a model comparison has been performed with data from various reanalysis models. |
format |
Text |
author |
Buschmann, Matthias Deutscher, Nicholas M. Palm, Mathias Warneke, Thorsten Weinzierl, Christine Notholt, Justus |
spellingShingle |
Buschmann, Matthias Deutscher, Nicholas M. Palm, Mathias Warneke, Thorsten Weinzierl, Christine Notholt, Justus The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
author_facet |
Buschmann, Matthias Deutscher, Nicholas M. Palm, Mathias Warneke, Thorsten Weinzierl, Christine Notholt, Justus |
author_sort |
Buschmann, Matthias |
title |
The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
title_short |
The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
title_full |
The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
title_fullStr |
The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
title_full_unstemmed |
The arctic seasonal cycle of total column CO2 and CH4 from ground-based solar and lunar FTIR absorption spectrometry |
title_sort |
arctic seasonal cycle of total column co2 and ch4 from ground-based solar and lunar ftir absorption spectrometry |
publishDate |
2018 |
url |
https://doi.org/10.5194/amt-10-2397-2017 https://amt.copernicus.org/articles/10/2397/2017/ |
geographic |
Arctic Ny-Ålesund |
geographic_facet |
Arctic Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund polar night |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund polar night |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-10-2397-2017 https://amt.copernicus.org/articles/10/2397/2017/ |
op_doi |
https://doi.org/10.5194/amt-10-2397-2017 |
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Atmospheric Measurement Techniques |
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10 |
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7 |
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2397 |
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2411 |
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1766338077270212608 |