Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer
During the 2011/12 and 2012/13 austral summers, HCHO was investigated for the first time in ambient air, snow, and interstitial air at the Concordia site, located near Dome C on the East Antarctic Plateau, by deploying an Aerolaser AL-4021 analyzer. Snow emission fluxes were estimated from vertical...
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ftdoajarticles:oai:doaj.org/article:c5005b872684488db0549399222a42a7 2023-05-15T13:36:10+02:00 Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer S. Preunkert M. Legrand M. M. Frey A. Kukui J. Savarino H. Gallée M. King B. Jourdain W. Vicars D. Helmig 2015-06-01T00:00:00Z https://doi.org/10.5194/acp-15-6689-2015 https://doaj.org/article/c5005b872684488db0549399222a42a7 EN eng Copernicus Publications http://www.atmos-chem-phys.net/15/6689/2015/acp-15-6689-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-6689-2015 https://doaj.org/article/c5005b872684488db0549399222a42a7 Atmospheric Chemistry and Physics, Vol 15, Iss 12, Pp 6689-6705 (2015) Physics QC1-999 Chemistry QD1-999 article 2015 ftdoajarticles https://doi.org/10.5194/acp-15-6689-2015 2022-12-30T22:56:53Z During the 2011/12 and 2012/13 austral summers, HCHO was investigated for the first time in ambient air, snow, and interstitial air at the Concordia site, located near Dome C on the East Antarctic Plateau, by deploying an Aerolaser AL-4021 analyzer. Snow emission fluxes were estimated from vertical gradients of mixing ratios observed at 1 cm and 1 m above the snow surface as well as in interstitial air a few centimeters below the surface and in air just above the snowpack. Typical flux values range between 1 and 2 × 10 12 molecules m −2 s −1 at night and 3 and 5 × 10 12 molecules m −2 s −1 at noon. Shading experiments suggest that the photochemical HCHO production in the snowpack at Concordia remains negligible compared to temperature-driven air–snow exchanges. At 1 m above the snow surface, the observed mean mixing ratio of 130 pptv and its diurnal cycle characterized by a slight decrease around noon are quite well reproduced by 1-D simulations that include snow emissions and gas-phase methane oxidation chemistry. Simulations indicate that the gas-phase production from CH 4 oxidation largely contributes (66%) to the observed HCHO mixing ratios. In addition, HCHO snow emissions account for ~ 30% at night and ~ 10% at noon to the observed HCHO levels. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Austral Atmospheric Chemistry and Physics 15 12 6689 6705 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 S. Preunkert M. Legrand M. M. Frey A. Kukui J. Savarino H. Gallée M. King B. Jourdain W. Vicars D. Helmig Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
During the 2011/12 and 2012/13 austral summers, HCHO was investigated for the first time in ambient air, snow, and interstitial air at the Concordia site, located near Dome C on the East Antarctic Plateau, by deploying an Aerolaser AL-4021 analyzer. Snow emission fluxes were estimated from vertical gradients of mixing ratios observed at 1 cm and 1 m above the snow surface as well as in interstitial air a few centimeters below the surface and in air just above the snowpack. Typical flux values range between 1 and 2 × 10 12 molecules m −2 s −1 at night and 3 and 5 × 10 12 molecules m −2 s −1 at noon. Shading experiments suggest that the photochemical HCHO production in the snowpack at Concordia remains negligible compared to temperature-driven air–snow exchanges. At 1 m above the snow surface, the observed mean mixing ratio of 130 pptv and its diurnal cycle characterized by a slight decrease around noon are quite well reproduced by 1-D simulations that include snow emissions and gas-phase methane oxidation chemistry. Simulations indicate that the gas-phase production from CH 4 oxidation largely contributes (66%) to the observed HCHO mixing ratios. In addition, HCHO snow emissions account for ~ 30% at night and ~ 10% at noon to the observed HCHO levels. |
format |
Article in Journal/Newspaper |
author |
S. Preunkert M. Legrand M. M. Frey A. Kukui J. Savarino H. Gallée M. King B. Jourdain W. Vicars D. Helmig |
author_facet |
S. Preunkert M. Legrand M. M. Frey A. Kukui J. Savarino H. Gallée M. King B. Jourdain W. Vicars D. Helmig |
author_sort |
S. Preunkert |
title |
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
title_short |
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
title_full |
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
title_fullStr |
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
title_full_unstemmed |
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer |
title_sort |
formaldehyde (hcho) in air, snow, and interstitial air at concordia (east antarctic plateau) in summer |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/acp-15-6689-2015 https://doaj.org/article/c5005b872684488db0549399222a42a7 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Atmospheric Chemistry and Physics, Vol 15, Iss 12, Pp 6689-6705 (2015) |
op_relation |
http://www.atmos-chem-phys.net/15/6689/2015/acp-15-6689-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-6689-2015 https://doaj.org/article/c5005b872684488db0549399222a42a7 |
op_doi |
https://doi.org/10.5194/acp-15-6689-2015 |
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Atmospheric Chemistry and Physics |
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15 |
container_issue |
12 |
container_start_page |
6689 |
op_container_end_page |
6705 |
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