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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ftunivwollongong:oai:ro.uow.edu.au:smhpapers-5842 2023-05-15T15:06:16+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 2017-01-01T08:00:00Z application/pdf https://ro.uow.edu.au/smhpapers/4804 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5842&context=smhpapers unknown Research Online https://ro.uow.edu.au/smhpapers/4804 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5842&context=smhpapers Faculty of Science, Medicine and Health - Papers: part A Medicine and Health Sciences Social and Behavioral Sciences article 2017 ftunivwollongong 2020-02-25T11:41:18Z 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 CO2 and CH4 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 CO2 and CH4 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 xCO2 and −1. 94 ± 20. 63 ppb for xCH4. Additionally a model comparison has been performed with data from various reanalysis models. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund polar night University of Wollongong, Australia: Research Online Arctic Ny-Ålesund |
institution |
Open Polar |
collection |
University of Wollongong, Australia: Research Online |
op_collection_id |
ftunivwollongong |
language |
unknown |
topic |
Medicine and Health Sciences Social and Behavioral Sciences |
spellingShingle |
Medicine and Health Sciences Social and Behavioral Sciences 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 |
topic_facet |
Medicine and Health Sciences Social and Behavioral Sciences |
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 CO2 and CH4 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 CO2 and CH4 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 xCO2 and −1. 94 ± 20. 63 ppb for xCH4. Additionally a model comparison has been performed with data from various reanalysis models. |
format |
Article in Journal/Newspaper |
author |
Buschmann, Matthias Deutscher, Nicholas M Palm, Mathias Warneke, Thorsten Weinzierl, Christine Notholt, Justus |
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 |
publisher |
Research Online |
publishDate |
2017 |
url |
https://ro.uow.edu.au/smhpapers/4804 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5842&context=smhpapers |
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 |
Faculty of Science, Medicine and Health - Papers: part A |
op_relation |
https://ro.uow.edu.au/smhpapers/4804 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5842&context=smhpapers |
_version_ |
1766337913588547584 |