Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16
The 2015/16 Northern Hemisphere winter season was marked by peculiarities in the circulation pattern in the high-latitude mesopause region. Wind measurements from the Andenes (69° N, 13° E) meteor radar show westward winds below 84 km and eastward winds above. This wind pattern in the zonal wind was...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2017
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-35-711-2017 https://doaj.org/article/eb4d484c53fd44fc82524fe767255e29 |
id |
ftdoajarticles:oai:doaj.org/article:eb4d484c53fd44fc82524fe767255e29 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:eb4d484c53fd44fc82524fe767255e29 2023-05-15T13:25:18+02:00 Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 G. Stober V. Matthias C. Jacobi S. Wilhelm J. Höffner J. L. Chau 2017-06-01T00:00:00Z https://doi.org/10.5194/angeo-35-711-2017 https://doaj.org/article/eb4d484c53fd44fc82524fe767255e29 EN eng Copernicus Publications https://www.ann-geophys.net/35/711/2017/angeo-35-711-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-711-2017 0992-7689 1432-0576 https://doaj.org/article/eb4d484c53fd44fc82524fe767255e29 Annales Geophysicae, Vol 35, Pp 711-720 (2017) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2017 ftdoajarticles https://doi.org/10.5194/angeo-35-711-2017 2022-12-31T12:35:39Z The 2015/16 Northern Hemisphere winter season was marked by peculiarities in the circulation pattern in the high-latitude mesopause region. Wind measurements from the Andenes (69° N, 13° E) meteor radar show westward winds below 84 km and eastward winds above. This wind pattern in the zonal wind was observable between the end of December 2015 and the end of January 2016, i.e., conditions that are typical for the summer were found during winter. Additional meteor radar measurements at midlatitude stations did not show such a zonal wind reversal but indicate, together with the polar latitude stations, a reversal of the horizontal temperature gradient. This is confirmed by global satellite measurements. Therefore, it is plausible that the polar latitude summer-like zonal wind reversal in December–January is in accordance with the reversed horizontal temperature gradient assuming a thermal wind balance between mid- and polar latitudes. The reversed horizontal temperature gradient itself is induced by stationary planetary waves at lower and midlatitudes in the mesosphere, leading to a weakening of the residual circulation above the European sector. Article in Journal/Newspaper Andenes Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 35 3 711 720 |
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 G. Stober V. Matthias C. Jacobi S. Wilhelm J. Höffner J. L. Chau Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The 2015/16 Northern Hemisphere winter season was marked by peculiarities in the circulation pattern in the high-latitude mesopause region. Wind measurements from the Andenes (69° N, 13° E) meteor radar show westward winds below 84 km and eastward winds above. This wind pattern in the zonal wind was observable between the end of December 2015 and the end of January 2016, i.e., conditions that are typical for the summer were found during winter. Additional meteor radar measurements at midlatitude stations did not show such a zonal wind reversal but indicate, together with the polar latitude stations, a reversal of the horizontal temperature gradient. This is confirmed by global satellite measurements. Therefore, it is plausible that the polar latitude summer-like zonal wind reversal in December–January is in accordance with the reversed horizontal temperature gradient assuming a thermal wind balance between mid- and polar latitudes. The reversed horizontal temperature gradient itself is induced by stationary planetary waves at lower and midlatitudes in the mesosphere, leading to a weakening of the residual circulation above the European sector. |
format |
Article in Journal/Newspaper |
author |
G. Stober V. Matthias C. Jacobi S. Wilhelm J. Höffner J. L. Chau |
author_facet |
G. Stober V. Matthias C. Jacobi S. Wilhelm J. Höffner J. L. Chau |
author_sort |
G. Stober |
title |
Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
title_short |
Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
title_full |
Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
title_fullStr |
Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
title_full_unstemmed |
Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
title_sort |
exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16 |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/angeo-35-711-2017 https://doaj.org/article/eb4d484c53fd44fc82524fe767255e29 |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
Annales Geophysicae, Vol 35, Pp 711-720 (2017) |
op_relation |
https://www.ann-geophys.net/35/711/2017/angeo-35-711-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-711-2017 0992-7689 1432-0576 https://doaj.org/article/eb4d484c53fd44fc82524fe767255e29 |
op_doi |
https://doi.org/10.5194/angeo-35-711-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
3 |
container_start_page |
711 |
op_container_end_page |
720 |
_version_ |
1766384619877302272 |