Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream
During a research flight of the Wave-driven ISentropic Exchange (WISE) campaign, which was conducted over the eastern North Atlantic on 1 October 2017, the composition of the upper troposphere and lower stratosphere (UTLS) across the North Atlantic jet stream was observed by airborne, range-resolved...
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ftdoajarticles:oai:doaj.org/article:7a189502a1f341d59271b220b34952fc 2023-05-15T15:03:36+02:00 Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream A. Schäfler M. Sprenger H. Wernli A. Fix M. Wirth 2023-01-01T00:00:00Z https://doi.org/10.5194/acp-23-999-2023 https://doaj.org/article/7a189502a1f341d59271b220b34952fc EN eng Copernicus Publications https://acp.copernicus.org/articles/23/999/2023/acp-23-999-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-999-2023 1680-7316 1680-7324 https://doaj.org/article/7a189502a1f341d59271b220b34952fc Atmospheric Chemistry and Physics, Vol 23, Pp 999-1018 (2023) Physics QC1-999 Chemistry QD1-999 article 2023 ftdoajarticles https://doi.org/10.5194/acp-23-999-2023 2023-01-22T01:29:51Z During a research flight of the Wave-driven ISentropic Exchange (WISE) campaign, which was conducted over the eastern North Atlantic on 1 October 2017, the composition of the upper troposphere and lower stratosphere (UTLS) across the North Atlantic jet stream was observed by airborne, range-resolved differential absorption lidar (DIAL) profiles. We investigate how the high variability in the paired H 2 O and O 3 distribution along the two-dimensional lidar cross section is affected by synoptic-scale weather systems, as revealed by the Lagrangian history of the observed air masses. To this aim, the lidar observations are combined with 10 d backward trajectories along which meteorological parameters and derived turbulence diagnostics are traced. The transport and mixing characteristics are then projected to the vertical cross sections of the lidar measurements and to the H 2 O–O 3 phase space to explore linkages with the evolution of synoptic-scale weather systems and their interaction. Tropical, midlatitude, and arctic weather systems in the region of the jet stream and the related transport and mixing explain the complex H 2 O and O 3 distribution to a large extent: O 3 -rich stratospheric air from the high Arctic interacts with midlatitude air from the North Pacific in a northward-deflected jet stream associated with an anticyclone over the US and forms a filament extending into the tropopause fold beneath the jet stream. In the troposphere, lifting related to convection in the intertropical convergence zone (ITCZ) and two tropical cyclones that continuously injected H 2 O into dry descending air from the tropical Atlantic and Pacific form filamentary H 2 O structures. One tropical cyclone that transitioned into a midlatitude cyclone lifted moist boundary layer air, explaining the highest tropospheric H 2 O values. During the two days before the observations, the air with mixed tropospheric and stratospheric characteristics experienced frequent turbulence along the North Atlantic jet stream, indicating a strong ... Article in Journal/Newspaper Arctic North Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Pacific Atmospheric Chemistry and Physics 23 2 999 1018 |
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Directory of Open Access Journals: DOAJ Articles |
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topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 A. Schäfler M. Sprenger H. Wernli A. Fix M. Wirth Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
During a research flight of the Wave-driven ISentropic Exchange (WISE) campaign, which was conducted over the eastern North Atlantic on 1 October 2017, the composition of the upper troposphere and lower stratosphere (UTLS) across the North Atlantic jet stream was observed by airborne, range-resolved differential absorption lidar (DIAL) profiles. We investigate how the high variability in the paired H 2 O and O 3 distribution along the two-dimensional lidar cross section is affected by synoptic-scale weather systems, as revealed by the Lagrangian history of the observed air masses. To this aim, the lidar observations are combined with 10 d backward trajectories along which meteorological parameters and derived turbulence diagnostics are traced. The transport and mixing characteristics are then projected to the vertical cross sections of the lidar measurements and to the H 2 O–O 3 phase space to explore linkages with the evolution of synoptic-scale weather systems and their interaction. Tropical, midlatitude, and arctic weather systems in the region of the jet stream and the related transport and mixing explain the complex H 2 O and O 3 distribution to a large extent: O 3 -rich stratospheric air from the high Arctic interacts with midlatitude air from the North Pacific in a northward-deflected jet stream associated with an anticyclone over the US and forms a filament extending into the tropopause fold beneath the jet stream. In the troposphere, lifting related to convection in the intertropical convergence zone (ITCZ) and two tropical cyclones that continuously injected H 2 O into dry descending air from the tropical Atlantic and Pacific form filamentary H 2 O structures. One tropical cyclone that transitioned into a midlatitude cyclone lifted moist boundary layer air, explaining the highest tropospheric H 2 O values. During the two days before the observations, the air with mixed tropospheric and stratospheric characteristics experienced frequent turbulence along the North Atlantic jet stream, indicating a strong ... |
format |
Article in Journal/Newspaper |
author |
A. Schäfler M. Sprenger H. Wernli A. Fix M. Wirth |
author_facet |
A. Schäfler M. Sprenger H. Wernli A. Fix M. Wirth |
author_sort |
A. Schäfler |
title |
Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
title_short |
Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
title_full |
Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
title_fullStr |
Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
title_full_unstemmed |
Case study on the influence of synoptic-scale processes on the paired H 2 O–O 3 distribution in the UTLS across a North Atlantic jet stream |
title_sort |
case study on the influence of synoptic-scale processes on the paired h 2 o–o 3 distribution in the utls across a north atlantic jet stream |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-999-2023 https://doaj.org/article/7a189502a1f341d59271b220b34952fc |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Atmospheric Chemistry and Physics, Vol 23, Pp 999-1018 (2023) |
op_relation |
https://acp.copernicus.org/articles/23/999/2023/acp-23-999-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-999-2023 1680-7316 1680-7324 https://doaj.org/article/7a189502a1f341d59271b220b34952fc |
op_doi |
https://doi.org/10.5194/acp-23-999-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
2 |
container_start_page |
999 |
op_container_end_page |
1018 |
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1766335469821362176 |