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Horizontal Wavenumber Spectra Across the Middle Atmosphere From Airborne Lidar Observations During the 2019 Southern Hemispheric SSW

Knobloch, Stefanie and Dörnbrack, Andreas and Kaifler, Bernd and Rapp, Markus (2023) Horizontal Wavenumber Spectra Across the Middle Atmosphere From Airborne Lidar Observations During the 2019 Southern Hemispheric SSW. Geophysical Research Letters, 50 (14), e2023GL104357. Wiley. doi: 10.1029/2023GL104357. ISSN 0094-8276.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL104357

Abstract

Horizontal wavenumber spectra across the middle atmosphere are investigated based on density measurements with the Airborne Lidar for Middle Atmosphere research (ALIMA) in the vicinity of the Southern Andes, the Drake passage and the Antarctic peninsula in September 2019. The probed horizontal scales range from 2000 to 25 km. Spectral slopes are close to k−5/3 in the stratosphere and get shallower for horizontal wavelengths <200 km in the mesosphere. The spectral slopes are shown to be statistically robust with the presented number of flight legs despite the unknown orientation of true wave vectors relative to the flight track using synthetic data and a Monte Carlo approach. The largest spectral amplitudes are found over the ocean rather than over topography. The 2019 sudden stratospheric warming caused a critical level for MWs and a reduction of spectral amplitudes at horizontal wavelengths of about 200 km in the mesosphere.

Item URL in elib:https://elib.dlr.de/196137/
Document Type:Article
Title:Horizontal Wavenumber Spectra Across the Middle Atmosphere From Airborne Lidar Observations During the 2019 Southern Hemispheric SSW
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Knobloch, StefanieUNSPECIFIEDhttps://orcid.org/0000-0002-8947-4629139187820
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216UNSPECIFIED
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242XUNSPECIFIED
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900UNSPECIFIED
Date:20 July 2023
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
Volume:50
DOI:10.1029/2023GL104357
Page Range:e2023GL104357
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Gravity waves, Middle atmosphere, Lidar, ALIMA, spectral analysis
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 > Transport Meteorology
Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics
Deposited By: Knobloch, Stefanie
Deposited On:24 Jul 2023 09:00
Last Modified:24 Jul 2023 09:00

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