Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic?
The southeast Asian monsoon has a strong convectional component, with which aerosols are able to be lifted up into the lower stratosphere. Due to usually long lifetimes and long-range transport aerosols remain there much longer than in the troposphere and are also able to be advected around the glob...
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Online Access: | https://doi.org/10.5194/egusphere-2024-124 https://noa.gwlb.de/receive/cop_mods_00071990 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070227/egusphere-2024-124.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-124/egusphere-2024-124.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00071990 2024-04-14T08:06:50+00:00 Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? Graßl, Sandra Ritter, Christoph Tritscher, Ines Vogel, Bärbel 2024-02 electronic https://doi.org/10.5194/egusphere-2024-124 https://noa.gwlb.de/receive/cop_mods_00071990 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070227/egusphere-2024-124.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-124/egusphere-2024-124.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2024-124 https://noa.gwlb.de/receive/cop_mods_00071990 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070227/egusphere-2024-124.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-124/egusphere-2024-124.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2024-124 2024-03-19T12:18:16Z The southeast Asian monsoon has a strong convectional component, with which aerosols are able to be lifted up into the lower stratosphere. Due to usually long lifetimes and long-range transport aerosols remain there much longer than in the troposphere and are also able to be advected around the globe. Our aim of this study is a synergy between modelled tropical aerosol tracers by Chemical Lagrangian Model of the Stratosphere (CLaMS) and KARL (Koldewey Aerosol Raman Lidar) at AWIPEV, Ny-Ålesund in the Arctic, by comparing back- and forward trajectories with exemplary days of Lidar measurements as well as analyse the stratospheric aerosol background. We use global 3-dimensional Lagrangian transport simulations including surface origin tracers as well as back-trajectories to identify source regions of the aerosol particles measured over Ny-Ålesund. We analysed Lidar data for the year 2021 and found the stratosphere generally clear, without obvious aerosol layers from volcanic eruptions or forest fires. Still an obvious annual cycle of the backscatter coefficient with higher values in late summer to autumn and lower values in late winter have been found. Results from CLaMS model simulations indicate that from late summer to early autumn filaments with high fractions of air which originate in South Asia – one of the most polluted regions in the world – reach the Arctic in altitudes between 360 K and 380 K potential temperature. We found a coinciding measurement between the overpass of such a filament and Lidar observations, we estimated that backscatter and depolarisation increased by roughly 15 % during this event compared to the background aerosol concentration. Hence we demonstrate that the Asian summer monsoon is a weak but measurable source for Arctic stratospheric aerosol in late summer to early autumn. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Niedersächsisches Online-Archiv NOA Arctic Ny-Ålesund |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Graßl, Sandra Ritter, Christoph Tritscher, Ines Vogel, Bärbel Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
topic_facet |
article Verlagsveröffentlichung |
description |
The southeast Asian monsoon has a strong convectional component, with which aerosols are able to be lifted up into the lower stratosphere. Due to usually long lifetimes and long-range transport aerosols remain there much longer than in the troposphere and are also able to be advected around the globe. Our aim of this study is a synergy between modelled tropical aerosol tracers by Chemical Lagrangian Model of the Stratosphere (CLaMS) and KARL (Koldewey Aerosol Raman Lidar) at AWIPEV, Ny-Ålesund in the Arctic, by comparing back- and forward trajectories with exemplary days of Lidar measurements as well as analyse the stratospheric aerosol background. We use global 3-dimensional Lagrangian transport simulations including surface origin tracers as well as back-trajectories to identify source regions of the aerosol particles measured over Ny-Ålesund. We analysed Lidar data for the year 2021 and found the stratosphere generally clear, without obvious aerosol layers from volcanic eruptions or forest fires. Still an obvious annual cycle of the backscatter coefficient with higher values in late summer to autumn and lower values in late winter have been found. Results from CLaMS model simulations indicate that from late summer to early autumn filaments with high fractions of air which originate in South Asia – one of the most polluted regions in the world – reach the Arctic in altitudes between 360 K and 380 K potential temperature. We found a coinciding measurement between the overpass of such a filament and Lidar observations, we estimated that backscatter and depolarisation increased by roughly 15 % during this event compared to the background aerosol concentration. Hence we demonstrate that the Asian summer monsoon is a weak but measurable source for Arctic stratospheric aerosol in late summer to early autumn. |
format |
Article in Journal/Newspaper |
author |
Graßl, Sandra Ritter, Christoph Tritscher, Ines Vogel, Bärbel |
author_facet |
Graßl, Sandra Ritter, Christoph Tritscher, Ines Vogel, Bärbel |
author_sort |
Graßl, Sandra |
title |
Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
title_short |
Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
title_full |
Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
title_fullStr |
Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
title_full_unstemmed |
Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic? |
title_sort |
does the asian summer monsoon play a role in the stratospheric aerosol budget of the arctic? |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-124 https://noa.gwlb.de/receive/cop_mods_00071990 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070227/egusphere-2024-124.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-124/egusphere-2024-124.pdf |
geographic |
Arctic Ny-Ålesund |
geographic_facet |
Arctic Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund |
op_relation |
https://doi.org/10.5194/egusphere-2024-124 https://noa.gwlb.de/receive/cop_mods_00071990 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070227/egusphere-2024-124.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-124/egusphere-2024-124.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2024-124 |
_version_ |
1796304047759687680 |