Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations
The dynamical behavior of the mesosphere and lower thermosphere (MLT) region during strongly disturbed wintertime conditions commonly known as polar-night jet oscillations (PJOs) is described in detail and compared to other wintertime conditions. For this purpose, wind measurements provided by two s...
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ftleibnizopen:oai:oai.leibnizopen.de:rQ4yZIcBdbrxVwz6Q8yS 2023-05-15T13:25:21+02:00 Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations Conte, J. Federico Chau, Jorge L. Peters, Dieter H.W. 2019 application/pdf https://oa.tib.eu/renate/handle/123456789/6539 https://doi.org/10.34657/5586 eng eng Hoboken, NJ : Wiley CC BY-NC-ND 4.0 Unported https://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of geophysical research (JGR) : Atmospheres 124 (2019), Nr. 16 Ext-CMAM30 meteor radar MLT PJO polar vortex solar tides 550 article Text 2019 ftleibnizopen https://doi.org/10.34657/5586 2023-04-09T23:14:30Z The dynamical behavior of the mesosphere and lower thermosphere (MLT) region during strongly disturbed wintertime conditions commonly known as polar-night jet oscillations (PJOs) is described in detail and compared to other wintertime conditions. For this purpose, wind measurements provided by two specular meteor radars located at Andenes (69°N, 16°E) and Juliusruh (54°N, 13°E) are used to estimate horizontal mean winds and tides as an observational basis. Winds and tidal main features are analyzed and compared for three different cases: major sudden stratospheric warming (SSW) with (a) strong PJO event, (b) non-PJO event, and (c) no major SSWs. We show that the distinction into strong PJOs, non-PJOs, and winters with no major SSWs is better suited to identify differences in the behavior of the mean winds and tides during the boreal winter. To assess the impact of the stratospheric disturbed conditions on the MLT region, we investigate the 30-year nudged simulation by the Extended Canadian Middle Atmosphere Model. Analysis of geopotential height disturbances suggests that changes in the location of the polar vortex at mesospheric heights are responsible for the jets observed in the MLT mean winds during strong PJOs, which in turn influence the evolution of semidiurnal tides by increasing or decreasing their amplitudes depending on the tidal component. © 2019. The Authors. Leibniz_Fonds publishedVersion Article in Journal/Newspaper Andenes polar night LeibnizOpen (The Leibniz Association) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Ext-CMAM30 meteor radar MLT PJO polar vortex solar tides 550 |
spellingShingle |
Ext-CMAM30 meteor radar MLT PJO polar vortex solar tides 550 Conte, J. Federico Chau, Jorge L. Peters, Dieter H.W. Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
topic_facet |
Ext-CMAM30 meteor radar MLT PJO polar vortex solar tides 550 |
description |
The dynamical behavior of the mesosphere and lower thermosphere (MLT) region during strongly disturbed wintertime conditions commonly known as polar-night jet oscillations (PJOs) is described in detail and compared to other wintertime conditions. For this purpose, wind measurements provided by two specular meteor radars located at Andenes (69°N, 16°E) and Juliusruh (54°N, 13°E) are used to estimate horizontal mean winds and tides as an observational basis. Winds and tidal main features are analyzed and compared for three different cases: major sudden stratospheric warming (SSW) with (a) strong PJO event, (b) non-PJO event, and (c) no major SSWs. We show that the distinction into strong PJOs, non-PJOs, and winters with no major SSWs is better suited to identify differences in the behavior of the mean winds and tides during the boreal winter. To assess the impact of the stratospheric disturbed conditions on the MLT region, we investigate the 30-year nudged simulation by the Extended Canadian Middle Atmosphere Model. Analysis of geopotential height disturbances suggests that changes in the location of the polar vortex at mesospheric heights are responsible for the jets observed in the MLT mean winds during strong PJOs, which in turn influence the evolution of semidiurnal tides by increasing or decreasing their amplitudes depending on the tidal component. © 2019. The Authors. Leibniz_Fonds publishedVersion |
format |
Article in Journal/Newspaper |
author |
Conte, J. Federico Chau, Jorge L. Peters, Dieter H.W. |
author_facet |
Conte, J. Federico Chau, Jorge L. Peters, Dieter H.W. |
author_sort |
Conte, J. Federico |
title |
Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
title_short |
Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
title_full |
Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
title_fullStr |
Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
title_full_unstemmed |
Middle- and High-Latitude Mesosphere and Lower Thermosphere Mean Winds and Tides in Response to Strong Polar-Night Jet Oscillations |
title_sort |
middle- and high-latitude mesosphere and lower thermosphere mean winds and tides in response to strong polar-night jet oscillations |
publisher |
Hoboken, NJ : Wiley |
publishDate |
2019 |
url |
https://oa.tib.eu/renate/handle/123456789/6539 https://doi.org/10.34657/5586 |
genre |
Andenes polar night |
genre_facet |
Andenes polar night |
op_source |
Journal of geophysical research (JGR) : Atmospheres 124 (2019), Nr. 16 |
op_rights |
CC BY-NC-ND 4.0 Unported https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.34657/5586 |
_version_ |
1766384845480525824 |