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Gravity waves excited during a minor sudden stratospheric warming

Dörnbrack, Andreas and Gisinger, Sonja and Kaifler, Natalie and Portele, Tanja and Bramberger, Martina and Rapp, Markus and Gerding, Michael and Söder, Jens and Zagar, Nedjeljka and Jelic, Damjan (2018) Gravity waves excited during a minor sudden stratospheric warming. Atmospheric Chemistry and Physics (18), pp. 12915-12931. Copernicus Publications. DOI: 10.5194/acp-18-12915-2018 ISSN 1680-7316

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Official URL: https://doi.org/10.5194/acp-18-12915-2018

Abstract

An exceptionally deep upper-air sounding launched from Kiruna airport (67.82◦ N, 20.33◦ E) on 30 January 2016 stimulated the current investigation of internal gravity waves excited during a minor sudden stratospheric warming (SSW) in the Arctic winter 2015/16. The analysis of the radiosonde profile revealed large kinetic and potential energies in the upper stratosphere without any simultaneous enhancement of upper tropospheric and lower stratospheric values. Upward-propagating inertia-gravity waves in the upper stratosphere and downward-propagating modes in the lower stratosphere indicated a region of gravity wave Generation in the stratosphere. Two-dimensional wavelet analysis was applied to vertical time series of temperature fluctuations in order to determine the vertical propagation direction of the stratospheric gravity waves in 1-hourly high-resolution meteorological analyses and short-term forecasts. The separation of upward- and downward-propagating waves provided further evidence for a stratospheric source of gravity waves. The scale-dependent decomposition of the flow into a balanced component and inertia-gravity waves showed that coherent wave packets preferentially occurred at the inner edge of the Arctic polar vortex where a sub-vortex formed during the minor SSW.

Item URL in elib:https://elib.dlr.de/121768/
Document Type:Article
Title:Gravity waves excited during a minor sudden stratospheric warming
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Gisinger, SonjaDLR, IPAhttps://orcid.org/0000-0001-8188-4458
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Portele, TanjaDLR, IPAUNSPECIFIED
Bramberger, MartinaDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAUNSPECIFIED
Gerding, MichaelUniv. Rostock, KühlungsbornUNSPECIFIED
Söder, JensUniv. Rostock, KühlungsbornUNSPECIFIED
Zagar, NedjeljkaUniv. Ljubljana, SloveniaUNSPECIFIED
Jelic, DamjanUniv. Ljubljana, SloveniaUNSPECIFIED
Date:2018
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.5194/acp-18-12915-2018
Page Range:pp. 12915-12931
Publisher:Copernicus Publications
ISSN:1680-7316
Status:Published
Keywords:Analysis Radiosonde Profile, stratosphere, short-term forecasts
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 > Transport Meteorology
Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics
Deposited By: Ziegele, Brigitte
Deposited On:20 Sep 2018 15:52
Last Modified:02 May 2019 14:05

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