Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012
We present quasi-continuous measurements of temperature profiles in the Southern Hemisphere mesopause region during the transition from winter to summer conditions in 2011/2012. In a period of 120 days around solstice, we have performed iron lidar observations at Davis (69°S), Antarctica, for a tota...
Published in: | Geophysical Research Letters |
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Online Access: | https://elib.dlr.de/92939/ https://elib.dlr.de/92939/1/grl51900.pdf https://doi.org/10.1002/2014GL060777 |
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ftdlr:oai:elib.dlr.de:92939 2023-05-15T13:59:58+02:00 Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 Lübken, F.-J. Höffner, J. Viehl, T. P. Kaifler, Bernd Morris, R. J. 2014-07-17 application/pdf https://elib.dlr.de/92939/ https://elib.dlr.de/92939/1/grl51900.pdf https://doi.org/10.1002/2014GL060777 en eng Wiley https://elib.dlr.de/92939/1/grl51900.pdf Lübken, F.-J. und Höffner, J. und Viehl, T. P. und Kaifler, Bernd und Morris, R. J. (2014) Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012. Geophysical Research Letters, 41 (14), Seiten 5233-5238. Wiley. DOI:10.1002/2014GL060777 <https://doi.org/10.1002/2014GL060777> ISSN 0094-8276 Lidar Zeitschriftenbeitrag PeerReviewed 2014 ftdlr https://doi.org/10.1002/2014GL060777 2019-08-04T22:57:29Z We present quasi-continuous measurements of temperature profiles in the Southern Hemisphere mesopause region during the transition from winter to summer conditions in 2011/2012. In a period of 120 days around solstice, we have performed iron lidar observations at Davis (69°S), Antarctica, for a total of 736 h. The winter/summer transition is identified by a downward shift of the mesopause which occurs on 8 November 2011. Soon after transition, mesopause heights and temperatures are similar to the Northern Hemisphere (NH) colatitude summer (88 km, 130 K). Around solstice, the mesopause is elevated for several days by 4–5 km and is colder than typical NH temperatures by 10 K. In this period individual profiles show temperatures as low as 100 K. The occurrence of polar mesosphere summer echoes is closely connected to low temperatures. Below 88 to 90 km and in the main summer season of 2011/2012 temperatures at Davis are generally warmer compared to the NH by 5–15 K, whereas temperatures are generally colder above 90 km. The winter/summer transition and the first appearance of polar mesosphere summer echoes are strongly correlated to maximum zonal winds in the stratosphere which constrain gravity waves with eastward momentum reaching the mesosphere. At the breakdown of the stratospheric vortex around solstice, the mesopause is higher and, surprisingly, colder than normal. Other Non-Article Part of Journal/Newspaper Antarc* Antarctica German Aerospace Center: elib - DLR electronic library Geophysical Research Letters 41 14 5233 5238 |
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Open Polar |
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German Aerospace Center: elib - DLR electronic library |
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ftdlr |
language |
English |
topic |
Lidar |
spellingShingle |
Lidar Lübken, F.-J. Höffner, J. Viehl, T. P. Kaifler, Bernd Morris, R. J. Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
topic_facet |
Lidar |
description |
We present quasi-continuous measurements of temperature profiles in the Southern Hemisphere mesopause region during the transition from winter to summer conditions in 2011/2012. In a period of 120 days around solstice, we have performed iron lidar observations at Davis (69°S), Antarctica, for a total of 736 h. The winter/summer transition is identified by a downward shift of the mesopause which occurs on 8 November 2011. Soon after transition, mesopause heights and temperatures are similar to the Northern Hemisphere (NH) colatitude summer (88 km, 130 K). Around solstice, the mesopause is elevated for several days by 4–5 km and is colder than typical NH temperatures by 10 K. In this period individual profiles show temperatures as low as 100 K. The occurrence of polar mesosphere summer echoes is closely connected to low temperatures. Below 88 to 90 km and in the main summer season of 2011/2012 temperatures at Davis are generally warmer compared to the NH by 5–15 K, whereas temperatures are generally colder above 90 km. The winter/summer transition and the first appearance of polar mesosphere summer echoes are strongly correlated to maximum zonal winds in the stratosphere which constrain gravity waves with eastward momentum reaching the mesosphere. At the breakdown of the stratospheric vortex around solstice, the mesopause is higher and, surprisingly, colder than normal. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Lübken, F.-J. Höffner, J. Viehl, T. P. Kaifler, Bernd Morris, R. J. |
author_facet |
Lübken, F.-J. Höffner, J. Viehl, T. P. Kaifler, Bernd Morris, R. J. |
author_sort |
Lübken, F.-J. |
title |
Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
title_short |
Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
title_full |
Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
title_fullStr |
Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
title_full_unstemmed |
Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012 |
title_sort |
winter/summer mesopause temperature transition at davis (69°s) in 2011/2012 |
publisher |
Wiley |
publishDate |
2014 |
url |
https://elib.dlr.de/92939/ https://elib.dlr.de/92939/1/grl51900.pdf https://doi.org/10.1002/2014GL060777 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://elib.dlr.de/92939/1/grl51900.pdf Lübken, F.-J. und Höffner, J. und Viehl, T. P. und Kaifler, Bernd und Morris, R. J. (2014) Winter/summer mesopause temperature transition at Davis (69°S) in 2011/2012. Geophysical Research Letters, 41 (14), Seiten 5233-5238. Wiley. DOI:10.1002/2014GL060777 <https://doi.org/10.1002/2014GL060777> ISSN 0094-8276 |
op_doi |
https://doi.org/10.1002/2014GL060777 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
14 |
container_start_page |
5233 |
op_container_end_page |
5238 |
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1766268879795912704 |