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Airborne Wind Lidar Measurements of Vertical and Horizontal Winds for the Investigation of Orographically Induced Gravity Waves

Witschas, Benjamin and Rahm, Stephan and Dörnbrack, Andreas and Wagner, Johannes and Rapp, Markus (2017) Airborne Wind Lidar Measurements of Vertical and Horizontal Winds for the Investigation of Orographically Induced Gravity Waves. Journal of Atmospheric and Oceanic Technology, 34 (6), pp. 1371-1386. American Meteorological Society. DOI: 10.1175/JTECH-D-17-0021.1 ISSN 0739-0572

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Official URL: http://dx.doi.org/10.1175/JTECH-D-17-0021.1

Abstract

Airborne coherent Doppler wind lidar measurements, acquired during the Gravity Wave Life-Cycle (GW-LCYCLE) I field campaign performed from 2 to 14 December 2013 in Kiruna, Sweden, are used to investigate internal gravity waves (GWs) induced by flow across the Scandinavian Mountains. Vertical wind speed is derived from lidar measurements with a mean bias of less than 0.05 m s−1 and a standard deviation of 0.2 m s−1 by correcting horizontal wind projections onto the line-of-sight direction by means of ECMWF wind data. The horizontal wind speed and direction are retrieved from lidar measurements by applying a velocity–azimuth display scan and a spectral accumulation technique, leading to a horizontal resolution of about 9 km along the flight track and a vertical resolution of 100 m, respectively. Both vertical and horizontal wind measurements are valuable for characterizing GW properties as demonstrated by means of a flight performed on 13 December 2013 acquired during weather conditions favorable for orographic GW excitation.

Item URL in elib:https://elib.dlr.de/113786/
Document Type:Article
Title:Airborne Wind Lidar Measurements of Vertical and Horizontal Winds for the Investigation of Orographically Induced Gravity Waves
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Witschas, BenjaminDLR, IPAhttps://orcid.org/0000-0001-7993-1470
Rahm, StephanDLR, IPAUNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Wagner, JohannesDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAUNSPECIFIED
Date:2017
Journal or Publication Title:Journal of Atmospheric and Oceanic Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:34
DOI :10.1175/JTECH-D-17-0021.1
Page Range:pp. 1371-1386
Publisher:American Meteorological Society
ISSN:0739-0572
Status:Published
Keywords:Gravity waves; Inertia-gravity waves; Aircraft observations; Lidars/Lidar observations
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 > Lidar
Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:22 Aug 2017 11:49
Last Modified:31 Jul 2019 20:11

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