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Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina

Kaifler, Natalie and Kaifler, Bernd and Dörnbrack, Andreas and Rapp, Markus and Hormaechea, J. L. and de la Torre, Alejandro (2020) Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina. Scientific Reports (14529), pp. 1-10. Nature Publishing Group. doi: 10.1038/s41598-020-71443-7. ISSN 2045-2322.

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Official URL: https://www.nature.com/articles/s41598-020-71443-7

Abstract

Large-amplitude internal gravity waves were observed using Rayleigh lidar temperature soundings above Rio Grande, Argentina (54∘S, 68∘W), in the period 16–23 June 2018. Temperature perturbations in the upper stratosphere amounted to 80 K peak-to-peak and potential energy densities exceeded 400 J/kg. The measured amplitudes and phase alignments agree well with operational analyses and short-term forecasts of the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF), implying that these quasi-steady gravity waves resulted from the airflow across the Andes. We estimate gravity wave momentum fluxes larger than 100 mPa applying independent methods to both lidar data and IFS model data. These mountain waves deposited momentum at the inner edge of the polar night jet and led to a long-lasting deceleration of the stratospheric flow. The accumulated mountain wave drag affected the stratospheric circulation several thousand kilometers downstream. In the 2018 austral winter, mountain wave events of this magnitude contributed more than 30% of the total potential energy density, signifying their importance by perturbing the stratospheric polar vortex.

Item URL in elib:https://elib.dlr.de/135928/
Document Type:Article
Title:Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900
Hormaechea, J. L.Univ. Nacional de La Plata and CONICET, ArgentinienUNSPECIFIED
de la Torre, AlejandroUniv. Austral and CONICET, Pilar, ArgentinienUNSPECIFIED
Date:3 September 2020
Journal or Publication Title:Scientific Reports
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1038/s41598-020-71443-7
Page Range:pp. 1-10
Publisher:Nature Publishing Group
ISSN:2045-2322
Status:Published
Keywords:lidar, mountain waves, gravity waves
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Middle Atmosphere
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics
Deposited By: Kaifler, Dr. Natalie
Deposited On:14 Sep 2020 14:32
Last Modified:20 Jun 2021 15:54

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