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Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations

Schmidt, Carsten and Dunker, Tim and Sabrina, Lichtenstern and Scheer, Jürgen and Wüst, Sabine and Hoppe, Ulf-Peter and Bittner, Michael (2018) Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations. Journal of Atmospheric and Solar-Terrestrial Physics (173), pp. 119-127. Elsevier. DOI: 10.1016/j.jastp.2018.03.002 ISSN 1364-6826

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Official URL: https://www.sciencedirect.com/science/article/pii/S1364682617305576

Abstract

We present the derivation of gravity wave vertical wavelengths from OH airglow observations of different vibrational transitions. It utilizes small phase shifts regularly observed between the OH(3-1) and OH(4-2) intensities in the spectra of the GRIPS (GRound-based Infrared P-branch Spectrometer) instruments, which record the OH airglow emissions in the wavelength range from 1.5 μm to 1.6 μm simultaneously. These phase shifts are interpreted as being due to gravity waves passing through the OH airglow layer and affecting individual vibrational transitions at slightly different times due to small differences in their emission heights. The results are compared with co-located observations of the Na-Lidar measurements acquired between 2010 and 2014 at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR, 69.28 N, 16.01 E), Norway. This comparison shows best agreement if the mean height difference of the OH(3-1) and OH(4-2) emission is assumed to be 540 m (1σ +- 160 m). The results are also compared with co-located observations of the OH(6-2)- and O2b(0-1)-transitions by means of spectrometer observations (TANGOO instrument, Tilting-filter spectrometer for Atmospheric Nocturnal Ground-based Oxygen & hydrOxyl emission measurements) performed from 2013 until 2016 at Oberpfaffenhofen (48.08 N, 11.27 E), Germany. For approximately 40% of all wave events observed with GRIPS in the period range from 0.25 h to 17 h, a quantitative estimate of the phase relationship between the OH(3-1) and OH(4-2) intensities can be retrieved from the spectra allowing derivation of vertical wavelengths. The retrieval performs best for wave periods below two hours (80% success rate) and worse for periods above ten hours (successful in less than 10% of the cases). The average wavelength determined from 102 events amounts to 22.9 km (1σ: 9.0 km). The corresponding mean wavelength determined from the TANGOO observations amounts to 22.6 km +- 10.5 km, if a mean separation of 6.5 km is assumed for the height difference between the OH(6-2) and O2b(0-1)-transitions.

Item URL in elib:https://elib.dlr.de/123439/
Document Type:Article
Title:Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, Carstencarsten.schmidt (at) dlr.dehttps://orcid.org/0000-0002-9580-724X
Dunker, TimDept. of Physics and Technology, UiT the Arctic University of NorwayUNSPECIFIED
Sabrina, LichtensternUNSPECIFIEDUNSPECIFIED
Scheer, JürgenInstituto de Astronomía y Física del Espacio (IAFE), Buenos Aires, ArgentinaUNSPECIFIED
Wüst, Sabinesabine.wuest (at) dlr.deUNSPECIFIED
Hoppe, Ulf-PeterDept. of Physics and Technology, UiT the Arctic University of NorwayUNSPECIFIED
Bittner, Michaelmichael.bittner (at) dlr.deUNSPECIFIED
Date:2 March 2018
Journal or Publication Title:Journal of Atmospheric and Solar-Terrestrial Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.jastp.2018.03.002
Page Range:pp. 119-127
Publisher:Elsevier
ISSN:1364-6826
Status:Published
Keywords:Airglow MLT region Atmospheric gravity waves Vertical wavelengths NDMC
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):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Atmosphere
Deposited By: Schmidt, Carsten
Deposited On:21 Nov 2018 12:12
Last Modified:21 Nov 2018 12:12

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