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Winter/summer transition in the Antarctic mesopause region

Lübken, F.-J. and Höffner, J. and Viehl, T. P. and Becker, Erich and Latteck, R. and Kaifler, Bernd and Murphy, Damian J. and Morris, R. J. (2015) Winter/summer transition in the Antarctic mesopause region. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (12), pp. 394-409. Wiley. DOI: 10.1002/2015JD023928 ISSN 2169-897X

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2015JD023928/full

Abstract

A new set of temperature data with unprecedented resolution and accuracy has been obtained from Fe lidar measurements at Davis, Antarctica (69∘S). Here we concentrate on the months of the winter/summer transition (November to February) where we have collected a total of 1305 hours of observations in the three seasons 2010/2011, 2011/2012, and 2012/2013. The temporal development of temperatures around the mesopause in 2012/2013 is rather similar to the northern hemisphere (NH), whereas the other seasons are significantly different, exhibiting, e.g., an unusual higher and colder mesopause around solstice (‘elevated summer mesopause’, ESM). During this exceptional period mean daily mesopause heights and temperatures are approximately 92.0±0.5 km and 125 K, respectively. The seasonal variation of temperatures in the mesopause region is closely related to the circulation in the stratosphere which exhibits an early (late) vortex breakdown in 2012/2013 (2010/2011). The situation is more complicated in 2011/2012. The early (late) transition in the mesopause region is accompanied by an early (late) appearance of polar mesosphere summer echoes (PMSE). Zonal winds as measured by an MF radar also show systematic differences with westward winds reaching up to very high altitudes (nearly 100 km) for the late transition in 2010/2011 and to more common heights (∼90km) for the early transition in 2012/2013. A mesopause being higher and colder compared to the NH (as occasionally observed at Davis) cannot be achieved by standard models. More sophisticated characterization of gravity wave forcing might be required.

Item URL in elib:https://elib.dlr.de/100146/
Document Type:Article
Title:Winter/summer transition in the Antarctic mesopause region
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lübken, F.-J.Leibniz-Institute of Atmospheric Physics, Kühlungsborn, GermanyUNSPECIFIED
Höffner, J.Univ. RostockUNSPECIFIED
Viehl, T. P.Leibniz-Institute of Atmospheric Physics, Kühlungsborn, GermanyUNSPECIFIED
Becker, ErichIAP KühlungsbornUNSPECIFIED
Latteck, R.Leibniz-Institute of Atmospheric Physics, KühlungsbornUNSPECIFIED
Kaifler, BerndDLR, IPAUNSPECIFIED
Murphy, Damian J.Australian Antarctic Division, Hobart, TasmaniaUNSPECIFIED
Morris, R. J.Australian Antarctic Division, Kingston, Tasmania, AustraliaUNSPECIFIED
Date:27 November 2015
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :10.1002/2015JD023928
Page Range:pp. 394-409
Publisher:Wiley
ISSN:2169-897X
Status:Published
Keywords:Antarctica Middle atmosphere Lidar
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Kaifler, Dr. Natalie
Deposited On:30 Nov 2015 11:50
Last Modified:08 Mar 2018 18:35

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