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Large mid-latitude stratospheric temperature variability caused by inertial instability: A potential source of bias for gravity wave climatologies

Rapp, Markus and Dörnbrack, Andreas and Preusse, Peter (2018) Large mid-latitude stratospheric temperature variability caused by inertial instability: A potential source of bias for gravity wave climatologies. Geophysical Research Letters, pp. 1-23. Wiley. ISSN 0094-8276

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Official URL: http://dx.doi.org/10.1029/2018GL079142

Abstract

Stratospheric temperature perturbations (TP) that have previousl y been misinterpreted as du e to gravity waves are revisited . The perturbations ob-served by radio occultations during December 2015 had peak-to-peak amplitudes of 10 K extending from t h e Equator to mid-latitud es. The vertically stacked and horizontally flat structures had a vertical wavelength of 12 km.The signs of the TP were 18 0◦ phase shi ft ed between equat o r i al and midlatitudes at fi xed altit u d e levels. High-resolutio n operational analyses reveal that th ese shallow temperature structures were caused by inertial instabil- ity (II) due to the large meridional shear of the polar night jet (PNJ) at ist equatorward flank in combination with Rossby wave breaking. Large stratospheric TP owing to II do frequently occur in th e Northern Hemisphere (South- ern Hemisp h er e) from October to Apri l (April to October) in the 39 years of ERA-Interim data. During 10% of the days, TP exceed 5 K (peak-to -peak) .

Item URL in elib:https://elib.dlr.de/121977/
Document Type:Article
Title:Large mid-latitude stratospheric temperature variability caused by inertial instability: A potential source of bias for gravity wave climatologies
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rapp, MarkusDLR, IPA; LMU MünchenUNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Preusse, PeterFZ JülichUNSPECIFIED
Date:2018
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Page Range:pp. 1-23
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:stratosphere, gravity waves, hermisphere
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):Vorhaben Mittlere Atmosphäre
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:10 Oct 2018 18:28
Last Modified:31 Jul 2019 20:19

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