Generation of layering in the upper arctic troposphere away from the jet stream
Ozone sounding databases for two stations, So-dankylä (67° N, 27° E) and Ny-Ålesund (79° N, 12° E) were used in order to investigate the generation of layering in the upper and middle troposphere of the Arctic. We concentrated on dry, ozone-rich and stable layers observed below the thermal tropopaus...
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ftdoajarticles:oai:doaj.org/article:005e0020cca340c0a62b821bd7b13d6d 2023-05-15T15:03:53+02:00 Generation of layering in the upper arctic troposphere away from the jet stream A. Karpetchko E. Kyro P. von der Gathen 2003-07-01T00:00:00Z https://doi.org/10.5194/angeo-21-1653-2003 https://doaj.org/article/005e0020cca340c0a62b821bd7b13d6d EN eng Copernicus Publications https://www.ann-geophys.net/21/1653/2003/angeo-21-1653-2003.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-21-1653-2003 0992-7689 1432-0576 https://doaj.org/article/005e0020cca340c0a62b821bd7b13d6d Annales Geophysicae, Vol 21, Pp 1653-1665 (2003) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2003 ftdoajarticles https://doi.org/10.5194/angeo-21-1653-2003 2022-12-31T03:04:49Z Ozone sounding databases for two stations, So-dankylä (67° N, 27° E) and Ny-Ålesund (79° N, 12° E) were used in order to investigate the generation of layering in the upper and middle troposphere of the Arctic. We concentrated on dry, ozone-rich and stable layers observed below the thermal tropopause under light wind conditions. This condition ensures that the observed layer is not a tropopause fold, a well-known phenomenon that develops within frontal zones near the jet stream. Selection criteria for ozone, humidity and stability anomalies of the tropopause fold detection algorithm were used here to pick out for detailed studies the most pronounced examples of laminae. For all these cases the meteorological situations were investigated in order to establish the origin of the observed layers. We found that layers could be classified into two groups. Laminae of the first group were observed equatorward of the jet stream and those of a second group were observed poleward of the jet. The meteorological situation for the first group resembles that for equatorward stratospheric streamer propagation. It was found that this group accounts for only a small fraction of the layers observed at Sodankylä and for none of those observed at Ny-Ålesund during the period investigated. A large case-to-case variability in the synoptic situation was observed for the second group of laminae, which were detected northward of the jet stream. Nevertheless, in about half of the cases, streamers of tropospheric air were found in the vicinity of the stations on the isentropic surfaces just above the detected stratospheric layers. Back trajectory analyses showed that these layers originated in the vicinity of the polar jet stream. We suppose that laminae-like structures in the troposphere were caused, in both groups, by equatorward (poleward) advection of the stratospheric (tropospheric) air, together with differential vertical shear. Forward-trajectory calculations suggest that, subsequently, a part of the stratospheric layers can mix ... Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Sodankylä Directory of Open Access Journals: DOAJ Articles Arctic Ny-Ålesund Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Annales Geophysicae 21 7 1653 1665 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 A. Karpetchko E. Kyro P. von der Gathen Generation of layering in the upper arctic troposphere away from the jet stream |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Ozone sounding databases for two stations, So-dankylä (67° N, 27° E) and Ny-Ålesund (79° N, 12° E) were used in order to investigate the generation of layering in the upper and middle troposphere of the Arctic. We concentrated on dry, ozone-rich and stable layers observed below the thermal tropopause under light wind conditions. This condition ensures that the observed layer is not a tropopause fold, a well-known phenomenon that develops within frontal zones near the jet stream. Selection criteria for ozone, humidity and stability anomalies of the tropopause fold detection algorithm were used here to pick out for detailed studies the most pronounced examples of laminae. For all these cases the meteorological situations were investigated in order to establish the origin of the observed layers. We found that layers could be classified into two groups. Laminae of the first group were observed equatorward of the jet stream and those of a second group were observed poleward of the jet. The meteorological situation for the first group resembles that for equatorward stratospheric streamer propagation. It was found that this group accounts for only a small fraction of the layers observed at Sodankylä and for none of those observed at Ny-Ålesund during the period investigated. A large case-to-case variability in the synoptic situation was observed for the second group of laminae, which were detected northward of the jet stream. Nevertheless, in about half of the cases, streamers of tropospheric air were found in the vicinity of the stations on the isentropic surfaces just above the detected stratospheric layers. Back trajectory analyses showed that these layers originated in the vicinity of the polar jet stream. We suppose that laminae-like structures in the troposphere were caused, in both groups, by equatorward (poleward) advection of the stratospheric (tropospheric) air, together with differential vertical shear. Forward-trajectory calculations suggest that, subsequently, a part of the stratospheric layers can mix ... |
format |
Article in Journal/Newspaper |
author |
A. Karpetchko E. Kyro P. von der Gathen |
author_facet |
A. Karpetchko E. Kyro P. von der Gathen |
author_sort |
A. Karpetchko |
title |
Generation of layering in the upper arctic troposphere away from the jet stream |
title_short |
Generation of layering in the upper arctic troposphere away from the jet stream |
title_full |
Generation of layering in the upper arctic troposphere away from the jet stream |
title_fullStr |
Generation of layering in the upper arctic troposphere away from the jet stream |
title_full_unstemmed |
Generation of layering in the upper arctic troposphere away from the jet stream |
title_sort |
generation of layering in the upper arctic troposphere away from the jet stream |
publisher |
Copernicus Publications |
publishDate |
2003 |
url |
https://doi.org/10.5194/angeo-21-1653-2003 https://doaj.org/article/005e0020cca340c0a62b821bd7b13d6d |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Arctic Ny-Ålesund Sodankylä |
geographic_facet |
Arctic Ny-Ålesund Sodankylä |
genre |
Arctic Ny Ålesund Ny-Ålesund Sodankylä |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Sodankylä |
op_source |
Annales Geophysicae, Vol 21, Pp 1653-1665 (2003) |
op_relation |
https://www.ann-geophys.net/21/1653/2003/angeo-21-1653-2003.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-21-1653-2003 0992-7689 1432-0576 https://doaj.org/article/005e0020cca340c0a62b821bd7b13d6d |
op_doi |
https://doi.org/10.5194/angeo-21-1653-2003 |
container_title |
Annales Geophysicae |
container_volume |
21 |
container_issue |
7 |
container_start_page |
1653 |
op_container_end_page |
1665 |
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1766335731974799360 |