Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements
A more accurate characterization of the sources and sinks of methane (CH 4 ) and carbon dioxide (CO 2 ) in the vulnerable Arctic environment is required to better predict climate change. A large-scale aircraft campaign took place in September 2020 focusing on the Siberian Arctic coast. CH 4 and CO 2...
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ftcopernicus:oai:publications.copernicus.org:acpd107216 2023-05-15T14:51:53+02:00 Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements Narbaud, Clément Paris, Jean-Daniel Wittig, Sophie Berchet, Antoine Saunois, Marielle Nédelec, Philippe Belan, Boris D. Arshinov, Mikhail Y. Belan, Sergei B. Davydov, Denis Fofonov, Alexander Kozlov, Artem 2022-10-25 application/pdf https://doi.org/10.5194/acp-2022-720 https://acp.copernicus.org/preprints/acp-2022-720/ eng eng doi:10.5194/acp-2022-720 https://acp.copernicus.org/preprints/acp-2022-720/ eISSN: 1680-7324 Text 2022 ftcopernicus https://doi.org/10.5194/acp-2022-720 2022-10-31T17:22:43Z A more accurate characterization of the sources and sinks of methane (CH 4 ) and carbon dioxide (CO 2 ) in the vulnerable Arctic environment is required to better predict climate change. A large-scale aircraft campaign took place in September 2020 focusing on the Siberian Arctic coast. CH 4 and CO 2 were measured in situ during the campaign and form the core of this study. Measured ozone (O 3 ) and carbon monoxide (CO) are used here as tracers. Median CH 4 mixing ratios are fairly higher than the monthly mean hemispheric reference (Mauna Loa, Hawaii, US) with 1890–1969 ppb vs 1887 ppb respectively, while CO 2 mixing ratios from all flights are lower (408.09–411.50 ppm vs 411.52 ppm). We also report on three case studies. Our analysis suggests that during the campaign the European part of Russia’s Arctic and Western Siberia were subject to long-range transport of polluted air masses, while the East was mainly under the influence of local emissions of greenhouse gases. The relative contributions of the main anthropogenic and natural sources of CH 4 are simulated using the Lagrangian model FLEXPART in order to identify dominant sources in the boundary layer and in the free troposphere. In western terrestrial flights, air masses composition is influenced by emissions from wetlands and anthropogenic activities (waste management, fossil fuel industry and to a lesser extent the agricultural sector), while in the East, emissions are dominated by freshwaters, wetlands, and the oceans, with a likely contribution from anthropogenic sources related to fossil fuels. Our results highlight the importance of the contributions from freshwater and oceans emissions. Considering the large uncertainties associated to them, our study suggests that the emissions from these aquatic sources should receive more attention in Siberia. Text Arctic Climate change Siberia Copernicus Publications: E-Journals Arctic |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
A more accurate characterization of the sources and sinks of methane (CH 4 ) and carbon dioxide (CO 2 ) in the vulnerable Arctic environment is required to better predict climate change. A large-scale aircraft campaign took place in September 2020 focusing on the Siberian Arctic coast. CH 4 and CO 2 were measured in situ during the campaign and form the core of this study. Measured ozone (O 3 ) and carbon monoxide (CO) are used here as tracers. Median CH 4 mixing ratios are fairly higher than the monthly mean hemispheric reference (Mauna Loa, Hawaii, US) with 1890–1969 ppb vs 1887 ppb respectively, while CO 2 mixing ratios from all flights are lower (408.09–411.50 ppm vs 411.52 ppm). We also report on three case studies. Our analysis suggests that during the campaign the European part of Russia’s Arctic and Western Siberia were subject to long-range transport of polluted air masses, while the East was mainly under the influence of local emissions of greenhouse gases. The relative contributions of the main anthropogenic and natural sources of CH 4 are simulated using the Lagrangian model FLEXPART in order to identify dominant sources in the boundary layer and in the free troposphere. In western terrestrial flights, air masses composition is influenced by emissions from wetlands and anthropogenic activities (waste management, fossil fuel industry and to a lesser extent the agricultural sector), while in the East, emissions are dominated by freshwaters, wetlands, and the oceans, with a likely contribution from anthropogenic sources related to fossil fuels. Our results highlight the importance of the contributions from freshwater and oceans emissions. Considering the large uncertainties associated to them, our study suggests that the emissions from these aquatic sources should receive more attention in Siberia. |
format |
Text |
author |
Narbaud, Clément Paris, Jean-Daniel Wittig, Sophie Berchet, Antoine Saunois, Marielle Nédelec, Philippe Belan, Boris D. Arshinov, Mikhail Y. Belan, Sergei B. Davydov, Denis Fofonov, Alexander Kozlov, Artem |
spellingShingle |
Narbaud, Clément Paris, Jean-Daniel Wittig, Sophie Berchet, Antoine Saunois, Marielle Nédelec, Philippe Belan, Boris D. Arshinov, Mikhail Y. Belan, Sergei B. Davydov, Denis Fofonov, Alexander Kozlov, Artem Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
author_facet |
Narbaud, Clément Paris, Jean-Daniel Wittig, Sophie Berchet, Antoine Saunois, Marielle Nédelec, Philippe Belan, Boris D. Arshinov, Mikhail Y. Belan, Sergei B. Davydov, Denis Fofonov, Alexander Kozlov, Artem |
author_sort |
Narbaud, Clément |
title |
Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
title_short |
Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
title_full |
Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
title_fullStr |
Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
title_full_unstemmed |
Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements |
title_sort |
disentangling methane and carbon dioxide sources and transport across the russian arctic from aircraft measurements |
publishDate |
2022 |
url |
https://doi.org/10.5194/acp-2022-720 https://acp.copernicus.org/preprints/acp-2022-720/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Siberia |
genre_facet |
Arctic Climate change Siberia |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-2022-720 https://acp.copernicus.org/preprints/acp-2022-720/ |
op_doi |
https://doi.org/10.5194/acp-2022-720 |
_version_ |
1766323028212318208 |