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Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves

Witschas, Benjamin and Gisinger, Sonja and Rahm, Stephan and Dörnbrack, Andreas and Fritts, David C. and Rapp, Markus (2023) Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves. Atmospheric Measurement Techniques (AMT), 16 (4), pp. 1087-1101. Copernicus Publications. doi: 10.5194/amt-16-1087-2023. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/16/1087/2023/


In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2 µm DWL) measurements were performed from the DLR Falcon aircraft to investigate gravity waves induced by flow across the Scandinavian Alps. During a mountain wave event on 28 January 2016, a novel momentum flux (MF) scan pattern with fore and aft propagating laser beams was applied to the 2 µm DWL. This allows us to measure the vertical wind and the horizontal wind along the flight track simultaneously with a high horizontal resolution of ≈ 800m and hence enables us to derive the horizontal MF profile for a broad wavelength spectrum from a few hundred meters to several hundred kilometers. The functionality of this method and the corresponding retrieval algorithm is validated using a comparison against in situ wind data measured by the High Altitude and Long Range (HALO) aircraft which was also deployed in Kiruna for the POLSTRACC (Polar Stratosphere in a Changing Climate) campaign. Based on that, the systematic and random error of the wind speeds retrieved from the 2 µm DWL observations are determined. Further, the measurements performed on that day are used to reveal significant changes in the horizontal wavelengths of the vertical wind speed and of the leg-averaged momentum fluxes in the tropopause inversion layer (TIL) region, which are likely to be induced by interfacial waves as recently presented by Gisinger et al. (2020).

Item URL in elib:https://elib.dlr.de/194145/
Document Type:Article
Title:Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Witschas, BenjaminDLR, IPAhttps://orcid.org/0000-0001-7993-1470UNSPECIFIED
Gisinger, SonjaDLR, IPAhttps://orcid.org/0000-0001-8188-4458UNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216UNSPECIFIED
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900UNSPECIFIED
Date:3 March 2023
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1087-1101
Publisher:Copernicus Publications
Keywords:Airborne wind lidar, 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 - Project ADM III cont.
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics
Institute for Solar-Terrestrial Physics
Deposited By: Witschas, Dr. Benjamin
Deposited On:03 Mar 2023 09:29
Last Modified:27 Apr 2023 08:42

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