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Temperature profiles from two close lidars and a satellite to infer the structure of a dominant gravity wave

Alexander, Peter and de la Torre, Alejandro and Kaifler, Natalie and Kaifler, Bernd and Salvador, J. and Llamedo, P. and Hierro, R. and Hormaechea, J. L. (2020) Temperature profiles from two close lidars and a satellite to infer the structure of a dominant gravity wave. Earth and Space Science. American Geophysical Union (AGU). doi: 10.1029/2020EA001074. ISSN 2333-5084.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://doi.org/10.1029/2020EA001074


Gravity waves (GW) are a crucial coupling mechanism for the exchange of energy and momentum flux (MF) between the lower, middle and upper layers of the atmosphere. Among the remote instruments used to study them, there has been a continuous increment in the last years in the installation and use of lidars (light detection and ranging) all over the globe. Two of them, which are only night-operating, are located in Río Gallegos (-69.3W, -51.6S) and Río Grande (-67.8W, -53.8S), in the neighborhood of the austral tip of South America. This is a well-known GW hotspot from late autumn to early spring. Neither the source for this intense activity nor the extent of its effects have been yet fully elucidated. In the last years, different methods that combine diverse retrieval techniques have been presented in order to describe the three-dimensional (3D) structure of observed GW, their propagation direction, their energy and the MF that they carry. Assuming the presence of a dominant GW in the covered region, we develop here a technique that uses the temperature profiles from two simultaneously working close lidars to infer the vertical wavelength, ground-based frequency and horizontal wavelength along the direction joining both instruments. If in addition within the time and spatial frame of both lidars there is also a retrieval from a satellite like SABER (Sounding of the Atmosphere using Broadband Emission Radiometry), then we show that it is possible to infer also the second horizontal wavelength and therefore reproduce the full 3D GW structure. Our method becomes verified with an example that includes tests that corroborate that both lidars and the satellite are sampling the same GW. The improvement of the Río Gallegos lidar performance could lead in the future to the observation of a wealth of cases during the GW high-season. Between 8 and 14 hours (depending on the month) of continuous nighttime data could be obtained in the stratosphere and mesosphere in simultaneous soundings from both ground-based lidars.

Item URL in elib:https://elib.dlr.de/134992/
Document Type:Article
Title:Temperature profiles from two close lidars and a satellite to infer the structure of a dominant gravity wave
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Alexander, PeterCONICET, Ciudad Univ., Buenos Aires, ArgentinienUNSPECIFIED
de la Torre, AlejandroUniv. Austral and CONICET, Pilar, ArgentinienUNSPECIFIED
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Salvador, J.Laser and Application Research Center, Villa Martelli, ArgentinienUNSPECIFIED
Llamedo, P.Univ. Austral and CONICET, Pilar, ArgentinienUNSPECIFIED
Hierro, R.Univ. Austral and CONICET, Pilar, ArgentinienUNSPECIFIED
Hormaechea, J. L.Univ. Nacional de La Plata and CONICET, ArgentinienUNSPECIFIED
Date:May 2020
Journal or Publication Title:Earth and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:American Geophysical Union (AGU)
Keywords:gravity waves, lidar, satellite
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
Institute of Atmospheric Physics > Lidar
Deposited By: Kaifler, Dr. Natalie
Deposited On:19 May 2020 10:17
Last Modified:20 Jun 2021 15:53

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