Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica
International audience Continuous measurements of reactive gases in the snowpack and above the snowpack surface were conducted at Concordia Station (Dome C), Antarctica, from December 2012-January 2014. Measured species included ozone, nitrogen oxides, gaseous elemental mercury, and formaldehyde, fo...
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ftinsu:oai:HAL:hal-03402319v1 2024-04-28T08:00:45+00:00 Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica Helmig, Detlev Liptzin, Daniel Hueber, Jacques Savarino, Joel 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) 2020-01-23 https://hal.science/hal-03402319 https://hal.science/hal-03402319/document https://hal.science/hal-03402319/file/Helmig-2020-Impact%20of%20exhaust%20emissions%20on%20che.pdf https://doi.org/10.5194/tc-14-199-2020 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-14-199-2020 hal-03402319 https://hal.science/hal-03402319 https://hal.science/hal-03402319/document https://hal.science/hal-03402319/file/Helmig-2020-Impact%20of%20exhaust%20emissions%20on%20che.pdf doi:10.5194/tc-14-199-2020 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-03402319 The Cryosphere, 2020, 14, pp.199 - 209. ⟨10.5194/tc-14-199-2020⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.5194/tc-14-199-2020 2024-04-05T00:36:09Z International audience Continuous measurements of reactive gases in the snowpack and above the snowpack surface were conducted at Concordia Station (Dome C), Antarctica, from December 2012-January 2014. Measured species included ozone, nitrogen oxides, gaseous elemental mercury, and formaldehyde, for study of photochemical reactions, surface exchange, and the seasonal cycles and atmospheric chemistry of these gases. The experiment was installed ~ 1 km from the station main infrastructure inside the station clean air sector and within the station electrical power grid boundary. Air was sampled continuously from three inlets on a 10 m meteorological tower, as well as from (two) above and four below the surface sampling inlets from within the snowpack. Despite being in the clean air sector, over the course of the 1.2-year study, we observed on the order of 15 occasions when exhaust plumes from the camp, most notably from the power generation system, were transported to the study site. Highly elevated levels of nitrogen oxides (up to 100 x background) and lowered ozone (up to ~50%), most likely from titration with nitric oxide, were measured in the exhaust plumes. Within 5-15 minutes from observing elevated pollutant levels above the snow, rapidly increasing and long-lasting concentration enhancements were measured in snowpack air. While pollution events typically lasted only a few minutes to an hour above the snow surface, elevated nitrogen oxides levels were observed in the snowpack lasting from a few days to one week. These observations add important new insight to the discussion if and how snowphotochemical experiments within reach of the power grid of polar research sites are possibly compromised by the snowpack being chemically influenced (contaminated) by gaseous and particulate emissions from the research camp activities. This question is critical for evaluating if snowpack trace chemical measurements from within the camp boundaries are representative for the vast polar ice sheets. Article in Journal/Newspaper Antarc* Antarctica The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 14 1 199 209 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Helmig, Detlev Liptzin, Daniel Hueber, Jacques Savarino, Joel Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Continuous measurements of reactive gases in the snowpack and above the snowpack surface were conducted at Concordia Station (Dome C), Antarctica, from December 2012-January 2014. Measured species included ozone, nitrogen oxides, gaseous elemental mercury, and formaldehyde, for study of photochemical reactions, surface exchange, and the seasonal cycles and atmospheric chemistry of these gases. The experiment was installed ~ 1 km from the station main infrastructure inside the station clean air sector and within the station electrical power grid boundary. Air was sampled continuously from three inlets on a 10 m meteorological tower, as well as from (two) above and four below the surface sampling inlets from within the snowpack. Despite being in the clean air sector, over the course of the 1.2-year study, we observed on the order of 15 occasions when exhaust plumes from the camp, most notably from the power generation system, were transported to the study site. Highly elevated levels of nitrogen oxides (up to 100 x background) and lowered ozone (up to ~50%), most likely from titration with nitric oxide, were measured in the exhaust plumes. Within 5-15 minutes from observing elevated pollutant levels above the snow, rapidly increasing and long-lasting concentration enhancements were measured in snowpack air. While pollution events typically lasted only a few minutes to an hour above the snow surface, elevated nitrogen oxides levels were observed in the snowpack lasting from a few days to one week. These observations add important new insight to the discussion if and how snowphotochemical experiments within reach of the power grid of polar research sites are possibly compromised by the snowpack being chemically influenced (contaminated) by gaseous and particulate emissions from the research camp activities. This question is critical for evaluating if snowpack trace chemical measurements from within the camp boundaries are representative for the vast polar ice sheets. |
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 |
Helmig, Detlev Liptzin, Daniel Hueber, Jacques Savarino, Joel |
author_facet |
Helmig, Detlev Liptzin, Daniel Hueber, Jacques Savarino, Joel |
author_sort |
Helmig, Detlev |
title |
Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
title_short |
Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
title_full |
Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
title_fullStr |
Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
title_full_unstemmed |
Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica |
title_sort |
impact of exhaust emissions on chemical snowpack composition at concordia station, antarctica |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03402319 https://hal.science/hal-03402319/document https://hal.science/hal-03402319/file/Helmig-2020-Impact%20of%20exhaust%20emissions%20on%20che.pdf https://doi.org/10.5194/tc-14-199-2020 |
genre |
Antarc* Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctica The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-03402319 The Cryosphere, 2020, 14, pp.199 - 209. ⟨10.5194/tc-14-199-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-14-199-2020 hal-03402319 https://hal.science/hal-03402319 https://hal.science/hal-03402319/document https://hal.science/hal-03402319/file/Helmig-2020-Impact%20of%20exhaust%20emissions%20on%20che.pdf doi:10.5194/tc-14-199-2020 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-14-199-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
1 |
container_start_page |
199 |
op_container_end_page |
209 |
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