Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA

Three-dimensional measurements of gravity waves are required in order to quantify their direction-resolved momentum fluxes and obtain a better understanding of their propagation characteristics. Such 3-D measurements of gravity waves in the lowermost stratosphere have been provided by the airborne G...

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Published in:Atmospheric Measurement Techniques
Main Authors: Krisch, Isabell, Ungermann, Jörn, Preusse, Peter, Kretschmer, Erik, Riese, Martin
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus 2018
Subjects:
Online Access:https://juser.fz-juelich.de/record/856154
https://juser.fz-juelich.de/search?p=id:%22FZJ-2018-05790%22
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spelling ftfzjuelichnvdb:oai:juser.fz-juelich.de:856154 2023-05-15T16:52:08+02:00 Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA Krisch, Isabell Ungermann, Jörn Preusse, Peter Kretschmer, Erik Riese, Martin DE 2018 https://juser.fz-juelich.de/record/856154 https://juser.fz-juelich.de/search?p=id:%22FZJ-2018-05790%22 eng eng Copernicus info:eu-repo/semantics/altIdentifier/issn/1867-1381 info:eu-repo/semantics/altIdentifier/issn/measurement info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-11-4327-2018 info:eu-repo/semantics/altIdentifier/issn/= info:eu-repo/semantics/altIdentifier/issn/(Internet) info:eu-repo/semantics/altIdentifier/wos/WOS:000439425200001 info:eu-repo/semantics/altIdentifier/issn/techniques info:eu-repo/semantics/altIdentifier/hdl/2128/19797 info:eu-repo/semantics/altIdentifier/issn/Atmospheric info:eu-repo/semantics/altIdentifier/issn/1867-8548 https://juser.fz-juelich.de/record/856154 https://juser.fz-juelich.de/search?p=id:%22FZJ-2018-05790%22 info:eu-repo/semantics/openAccess Atmospheric measurement techniques 11(7), 4327 - 4344 (2018). doi:10.5194/amt-11-4327-2018 info:eu-repo/classification/ddc/550 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftfzjuelichnvdb https://doi.org/10.5194/amt-11-4327-2018 2022-10-02T22:17:12Z Three-dimensional measurements of gravity waves are required in order to quantify their direction-resolved momentum fluxes and obtain a better understanding of their propagation characteristics. Such 3-D measurements of gravity waves in the lowermost stratosphere have been provided by the airborne Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) using full angle tomography. Closed flight patterns of sufficient size are needed to acquire the full set of angular measurements for full angle tomography. These take about 2h and are not feasible everywhere due to scientific reasons or air traffic control restrictions. Hence, this paper investigates the usability of limited angle tomography for gravity wave research based on synthetic observations. Limited angle tomography uses only a limited set of angles for tomographic reconstruction and can be applied to linear flight patterns. A synthetic end-to-end simulation has been performed to investigate the sensitivity of limited angle tomography to gravity waves with different wavelengths and orientations with respect to the flight path. For waves with wavefronts roughly perpendicular to the flight path, limited angle tomography and full angle tomography can derive wave parameters like wavelength, amplitude, and wave orientation with similar accuracy. For waves with a horizontal wavelength above 200km and vertical wavelength above 3km, the wavelengths can be retrieved with less than 10% error, the amplitude with less than 20% error, and the horizontal wave direction with an error below 10°. This is confirmed by a comparison of results obtained from full angle tomography and limited angle tomography for real measurements taken on 25 January 2016 over Iceland. The reproduction quality of gravity wave parameters with limited angle tomography, however, depends strongly on the orientation of the waves with respect to the flight path. Thus, full angle tomography might be preferable in cases in which the orientation of the wave cannot be predicted or waves ... Article in Journal/Newspaper Iceland Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Atmospheric Measurement Techniques 11 7 4327 4344
institution Open Polar
collection Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
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language English
topic info:eu-repo/classification/ddc/550
spellingShingle info:eu-repo/classification/ddc/550
Krisch, Isabell
Ungermann, Jörn
Preusse, Peter
Kretschmer, Erik
Riese, Martin
Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
topic_facet info:eu-repo/classification/ddc/550
description Three-dimensional measurements of gravity waves are required in order to quantify their direction-resolved momentum fluxes and obtain a better understanding of their propagation characteristics. Such 3-D measurements of gravity waves in the lowermost stratosphere have been provided by the airborne Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) using full angle tomography. Closed flight patterns of sufficient size are needed to acquire the full set of angular measurements for full angle tomography. These take about 2h and are not feasible everywhere due to scientific reasons or air traffic control restrictions. Hence, this paper investigates the usability of limited angle tomography for gravity wave research based on synthetic observations. Limited angle tomography uses only a limited set of angles for tomographic reconstruction and can be applied to linear flight patterns. A synthetic end-to-end simulation has been performed to investigate the sensitivity of limited angle tomography to gravity waves with different wavelengths and orientations with respect to the flight path. For waves with wavefronts roughly perpendicular to the flight path, limited angle tomography and full angle tomography can derive wave parameters like wavelength, amplitude, and wave orientation with similar accuracy. For waves with a horizontal wavelength above 200km and vertical wavelength above 3km, the wavelengths can be retrieved with less than 10% error, the amplitude with less than 20% error, and the horizontal wave direction with an error below 10°. This is confirmed by a comparison of results obtained from full angle tomography and limited angle tomography for real measurements taken on 25 January 2016 over Iceland. The reproduction quality of gravity wave parameters with limited angle tomography, however, depends strongly on the orientation of the waves with respect to the flight path. Thus, full angle tomography might be preferable in cases in which the orientation of the wave cannot be predicted or waves ...
format Article in Journal/Newspaper
author Krisch, Isabell
Ungermann, Jörn
Preusse, Peter
Kretschmer, Erik
Riese, Martin
author_facet Krisch, Isabell
Ungermann, Jörn
Preusse, Peter
Kretschmer, Erik
Riese, Martin
author_sort Krisch, Isabell
title Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
title_short Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
title_full Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
title_fullStr Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
title_full_unstemmed Limited angle tomography of mesoscale gravity waves by the infrared limb-sounder GLORIA
title_sort limited angle tomography of mesoscale gravity waves by the infrared limb-sounder gloria
publisher Copernicus
publishDate 2018
url https://juser.fz-juelich.de/record/856154
https://juser.fz-juelich.de/search?p=id:%22FZJ-2018-05790%22
op_coverage DE
genre Iceland
genre_facet Iceland
op_source Atmospheric measurement techniques 11(7), 4327 - 4344 (2018). doi:10.5194/amt-11-4327-2018
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info:eu-repo/semantics/altIdentifier/issn/Atmospheric
info:eu-repo/semantics/altIdentifier/issn/1867-8548
https://juser.fz-juelich.de/record/856154
https://juser.fz-juelich.de/search?p=id:%22FZJ-2018-05790%22
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op_doi https://doi.org/10.5194/amt-11-4327-2018
container_title Atmospheric Measurement Techniques
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