The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020
During the 1-year MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition, the German icebreaker Polarstern drifted through Arctic Ocean ice from October 2019 to May 2020, mainly at latitudes between 85 and 88.5∘ N. A multiwavelength polarization Raman lidar was op...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058506 2024-09-15T17:54:19+00:00 The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 Ohneiser, Kevin Ansmann, Albert Chudnovsky, Alexandra Engelmann, Ronny Ritter, Christoph Veselovskii, Igor Baars, Holger Gebauer, Henriette Griesche, Hannes Radenz, Martin Hofer, Julian Althausen, Dietrich Dahlke, Sandro Maturilli, Marion 2021-10 electronic https://doi.org/10.5194/acp-21-15783-2021 https://noa.gwlb.de/receive/cop_mods_00058506 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058141/acp-21-15783-2021.pdf https://acp.copernicus.org/articles/21/15783/2021/acp-21-15783-2021.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-15783-2021 https://noa.gwlb.de/receive/cop_mods_00058506 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058141/acp-21-15783-2021.pdf https://acp.copernicus.org/articles/21/15783/2021/acp-21-15783-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/acp-21-15783-2021 2024-06-26T04:36:34Z During the 1-year MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition, the German icebreaker Polarstern drifted through Arctic Ocean ice from October 2019 to May 2020, mainly at latitudes between 85 and 88.5∘ N. A multiwavelength polarization Raman lidar was operated on board the research vessel and continuously monitored aerosol and cloud layers up to a height of 30 km. During our mission, we expected to observe a thin residual volcanic aerosol layer in the stratosphere, originating from the Raikoke volcanic eruption in June 2019, with an aerosol optical thickness (AOT) of 0.005–0.01 at 500 nm over the North Pole area during the winter season. However, the highlight of our measurements was the detection of a persistent, 10 km deep aerosol layer in the upper troposphere and lower stratosphere (UTLS), from about 7–8 to 17–18 km height, with clear and unambiguous wildfire smoke signatures up to 12 km and an order of magnitude higher AOT of around 0.1 in the autumn of 2019. Case studies are presented to explain the specific optical fingerprints of aged wildfire smoke in detail. The pronounced aerosol layer was present throughout the winter half-year until the strong polar vortex began to collapse in late April 2020. We hypothesize that the detected smoke originated from extraordinarily intense and long-lasting wildfires in central and eastern Siberia in July and August 2019 and may have reached the tropopause layer by the self-lifting process. In this article, we summarize the main findings of our 7-month smoke observations and characterize the aerosol in terms of geometrical, optical, and microphysical properties. The UTLS AOT at 532 nm ranged from 0.05–0.12 in October–November 2019 and 0.03–0.06 during the main winter season. The Raikoke aerosol fraction was estimated to always be lower than 15 %. We assume that the volcanic aerosol was above the smoke layer (above 13 km height). As an unambiguous sign of the dominance of smoke in the main aerosol layer from 7–13 km height, ... Article in Journal/Newspaper Arctic Ocean North Pole Siberia Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 21 20 15783 15808 |
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article Verlagsveröffentlichung Ohneiser, Kevin Ansmann, Albert Chudnovsky, Alexandra Engelmann, Ronny Ritter, Christoph Veselovskii, Igor Baars, Holger Gebauer, Henriette Griesche, Hannes Radenz, Martin Hofer, Julian Althausen, Dietrich Dahlke, Sandro Maturilli, Marion The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
topic_facet |
article Verlagsveröffentlichung |
description |
During the 1-year MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition, the German icebreaker Polarstern drifted through Arctic Ocean ice from October 2019 to May 2020, mainly at latitudes between 85 and 88.5∘ N. A multiwavelength polarization Raman lidar was operated on board the research vessel and continuously monitored aerosol and cloud layers up to a height of 30 km. During our mission, we expected to observe a thin residual volcanic aerosol layer in the stratosphere, originating from the Raikoke volcanic eruption in June 2019, with an aerosol optical thickness (AOT) of 0.005–0.01 at 500 nm over the North Pole area during the winter season. However, the highlight of our measurements was the detection of a persistent, 10 km deep aerosol layer in the upper troposphere and lower stratosphere (UTLS), from about 7–8 to 17–18 km height, with clear and unambiguous wildfire smoke signatures up to 12 km and an order of magnitude higher AOT of around 0.1 in the autumn of 2019. Case studies are presented to explain the specific optical fingerprints of aged wildfire smoke in detail. The pronounced aerosol layer was present throughout the winter half-year until the strong polar vortex began to collapse in late April 2020. We hypothesize that the detected smoke originated from extraordinarily intense and long-lasting wildfires in central and eastern Siberia in July and August 2019 and may have reached the tropopause layer by the self-lifting process. In this article, we summarize the main findings of our 7-month smoke observations and characterize the aerosol in terms of geometrical, optical, and microphysical properties. The UTLS AOT at 532 nm ranged from 0.05–0.12 in October–November 2019 and 0.03–0.06 during the main winter season. The Raikoke aerosol fraction was estimated to always be lower than 15 %. We assume that the volcanic aerosol was above the smoke layer (above 13 km height). As an unambiguous sign of the dominance of smoke in the main aerosol layer from 7–13 km height, ... |
format |
Article in Journal/Newspaper |
author |
Ohneiser, Kevin Ansmann, Albert Chudnovsky, Alexandra Engelmann, Ronny Ritter, Christoph Veselovskii, Igor Baars, Holger Gebauer, Henriette Griesche, Hannes Radenz, Martin Hofer, Julian Althausen, Dietrich Dahlke, Sandro Maturilli, Marion |
author_facet |
Ohneiser, Kevin Ansmann, Albert Chudnovsky, Alexandra Engelmann, Ronny Ritter, Christoph Veselovskii, Igor Baars, Holger Gebauer, Henriette Griesche, Hannes Radenz, Martin Hofer, Julian Althausen, Dietrich Dahlke, Sandro Maturilli, Marion |
author_sort |
Ohneiser, Kevin |
title |
The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
title_short |
The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
title_full |
The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
title_fullStr |
The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
title_full_unstemmed |
The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019–2020 |
title_sort |
unexpected smoke layer in the high arctic winter stratosphere during mosaic 2019–2020 |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-15783-2021 https://noa.gwlb.de/receive/cop_mods_00058506 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058141/acp-21-15783-2021.pdf https://acp.copernicus.org/articles/21/15783/2021/acp-21-15783-2021.pdf |
genre |
Arctic Ocean North Pole Siberia |
genre_facet |
Arctic Ocean North Pole Siberia |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-15783-2021 https://noa.gwlb.de/receive/cop_mods_00058506 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058141/acp-21-15783-2021.pdf https://acp.copernicus.org/articles/21/15783/2021/acp-21-15783-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-21-15783-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
20 |
container_start_page |
15783 |
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15808 |
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1810430594534866944 |