New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization
International audience To fully decipher the role of nitrate photolysis on the atmospheric oxidative capacity in snow-covered regions, NOx flux must be determined with more precision than existing estimates. Here, we introduce a method based on dynamic flux chamber measurements for evaluating the NO...
Published in: | Journal of Geophysical Research: Atmospheres |
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ftunivnantes:oai:HAL:hal-03402244v1 2023-05-15T13:45:08+02:00 New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization Barbero, Albane Savarino, J. Blouzon, C. Frey, M. Picard, G. Ahmed, S Amory, C Thomas, J Huang, Y. Caillon, N. Grilli, Roberto Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2021-10-27 https://hal.science/hal-03402244 https://hal.science/hal-03402244/document https://hal.science/hal-03402244/file/20210224_New%20estimation%20of%20NOx%20snow_V3_ab.pdf https://doi.org/10.1029/2021JD035062 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035062 hal-03402244 https://hal.science/hal-03402244 https://hal.science/hal-03402244/document https://hal.science/hal-03402244/file/20210224_New%20estimation%20of%20NOx%20snow_V3_ab.pdf doi:10.1029/2021JD035062 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03402244 Journal of Geophysical Research: Atmospheres, 2021, 126 (20), ⟨10.1029/2021JD035062⟩ Model parameterization Nitrate photolysis Antarctic Plateau Oxidative capacity Flux chamber Snowpack emissions [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1029/2021JD035062 2023-03-01T02:10:38Z International audience To fully decipher the role of nitrate photolysis on the atmospheric oxidative capacity in snow-covered regions, NOx flux must be determined with more precision than existing estimates. Here, we introduce a method based on dynamic flux chamber measurements for evaluating the NOx production by photolysis of snowpack nitrate in Antarctica. Flux chamber experiments were conducted for the first time in Antarctica, at the French-Italian station Concordia, Dome C (75°06'S, 123°20’E, 3233 m a.s.l) during the 2019–2020 summer campaign. Measurements were gathered with several snow samples of different ages ranging from newly formed drifted snow to 6-year-old firn. Contrary to existing literature expectations, the daily average photolysis rate coefficient, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0007, did not significantly vary between differently aged snow samples, suggesting that the photolabile nitrate in snow behaves as a single-family source with common photochemical properties, where a urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0008 = (2.37 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0009 0.35) × 10−8 s−1 (1urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0011) has been calculated from December 10th 2019 to January 7th 2020. At Dome C summer daily average NOx flux, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0015, based on measured NOx production rates was estimated to be (4.3 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0017 1.2) × 108 molecules cm−2 s−1, which is 1.5–7 times less than the net NOx flux observed previously above snow at Dome C using the gradient flux method. Using these results, we extrapolated an annual continental snow sourced NOx budget of 0.017 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0022 0.003 Tgurn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0023N y−1, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-00252 times the nitrogen budget, (N-budget), of the stratospheric denitrification previously estimated for ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Journal of Geophysical Research: Atmospheres 126 20 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Model parameterization Nitrate photolysis Antarctic Plateau Oxidative capacity Flux chamber Snowpack emissions [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Model parameterization Nitrate photolysis Antarctic Plateau Oxidative capacity Flux chamber Snowpack emissions [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Barbero, Albane Savarino, J. Blouzon, C. Frey, M. Picard, G. Ahmed, S Amory, C Thomas, J Huang, Y. Caillon, N. Grilli, Roberto New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
topic_facet |
Model parameterization Nitrate photolysis Antarctic Plateau Oxidative capacity Flux chamber Snowpack emissions [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience To fully decipher the role of nitrate photolysis on the atmospheric oxidative capacity in snow-covered regions, NOx flux must be determined with more precision than existing estimates. Here, we introduce a method based on dynamic flux chamber measurements for evaluating the NOx production by photolysis of snowpack nitrate in Antarctica. Flux chamber experiments were conducted for the first time in Antarctica, at the French-Italian station Concordia, Dome C (75°06'S, 123°20’E, 3233 m a.s.l) during the 2019–2020 summer campaign. Measurements were gathered with several snow samples of different ages ranging from newly formed drifted snow to 6-year-old firn. Contrary to existing literature expectations, the daily average photolysis rate coefficient, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0007, did not significantly vary between differently aged snow samples, suggesting that the photolabile nitrate in snow behaves as a single-family source with common photochemical properties, where a urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0008 = (2.37 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0009 0.35) × 10−8 s−1 (1urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0011) has been calculated from December 10th 2019 to January 7th 2020. At Dome C summer daily average NOx flux, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0015, based on measured NOx production rates was estimated to be (4.3 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0017 1.2) × 108 molecules cm−2 s−1, which is 1.5–7 times less than the net NOx flux observed previously above snow at Dome C using the gradient flux method. Using these results, we extrapolated an annual continental snow sourced NOx budget of 0.017 urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0022 0.003 Tgurn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-0023N y−1, urn:x-wiley:2169897X:media:jgrd57323:jgrd57323-math-00252 times the nitrogen budget, (N-budget), of the stratospheric denitrification previously estimated for ... |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Barbero, Albane Savarino, J. Blouzon, C. Frey, M. Picard, G. Ahmed, S Amory, C Thomas, J Huang, Y. Caillon, N. Grilli, Roberto |
author_facet |
Barbero, Albane Savarino, J. Blouzon, C. Frey, M. Picard, G. Ahmed, S Amory, C Thomas, J Huang, Y. Caillon, N. Grilli, Roberto |
author_sort |
Barbero, Albane |
title |
New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
title_short |
New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
title_full |
New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
title_fullStr |
New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
title_full_unstemmed |
New estimation of NO x snow-source on the Antarctic Plateau for a better global model parameterization |
title_sort |
new estimation of no x snow-source on the antarctic plateau for a better global model parameterization |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03402244 https://hal.science/hal-03402244/document https://hal.science/hal-03402244/file/20210224_New%20estimation%20of%20NOx%20snow_V3_ab.pdf https://doi.org/10.1029/2021JD035062 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03402244 Journal of Geophysical Research: Atmospheres, 2021, 126 (20), ⟨10.1029/2021JD035062⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035062 hal-03402244 https://hal.science/hal-03402244 https://hal.science/hal-03402244/document https://hal.science/hal-03402244/file/20210224_New%20estimation%20of%20NOx%20snow_V3_ab.pdf doi:10.1029/2021JD035062 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JD035062 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
20 |
_version_ |
1766213605769871360 |