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Detecting and Characterising atmospheric gravity waves on Mars' atmosphere - Final results using data from OMEGA/Mars Express

Brasil, F. and Machado, P. and Gilli, Gabriella and Moinelo, Alejandro and Silva, J. and Espadinha, D. and Riu, L. and Carter, J. and Tirsch, Daniela and Roatsch, Thomas and Wilson, C.F. (2023) Detecting and Characterising atmospheric gravity waves on Mars' atmosphere - Final results using data from OMEGA/Mars Express. 55th DPS Meeting joint with EPSC, 2023-10-01 - 2023-10-15, San Antonio, TX, USA.

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Official URL: https://baas.aas.org/pub/2023n8i213p06/release/1


We present the final results from the detection and characterisation of mesoscale waves on the lower clouds of Mars [1] using images from the Observatoire pour la Minéralogie, l’Eau, les Glaces et l’Activité (OMEGA) [2] onboard the European Mars Express (MEx) space mission [3]. We used image navigation and processing techniques based on contrast enhancement and geometrical projections to characterise morphological properties of the detected gravity waves (GW), such as horizontal wavelength or packet length. Our study covers 25 months of data spanning from Jan. 2004 to Jan. 2006, and from June to July 2007, corresponding to a one Martian year [MY26- MY27]. Out of 148 detected wave packets, we were able to characterise 61 across more than 4000 images covering a broad region of the Martian globe. Our results reveal that waves exhibit an average horizontal wavelength of 23 km, which is consistent with previous observations [4,5]. We also extend the study by characterising their packet width, length and orientation. Taking advantage of the large dataset available from the OMEGA instrument, we also conducted a spatial and temporal investigation of the waves, namely their occurrence in specific local times and solar longitudes. Our characterisation showed a higher frequency of GW during daytime hours, particularly within the 13-15 LTST range. Concerning the solar longitude that is a measure of the Martian seasons, we noted that GW activity is prevalent during the winter season in both hemispheres, suggesting a relationship between seasonal variations and gravity wave generation, which was previously mentioned in the literature [6–8]. We will also present the preliminary results of GW using the HRSC instrument.

Item URL in elib:https://elib.dlr.de/201474/
Document Type:Conference or Workshop Item (Speech)
Title:Detecting and Characterising atmospheric gravity waves on Mars' atmosphere - Final results using data from OMEGA/Mars Express
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Brasil, F.Institute of Astrophysics and Space Sciences, Lisbon, PortugalUNSPECIFIEDUNSPECIFIED
Machado, P.Institute of Astrophysics and Space Sciences, Lisbon, PortugalUNSPECIFIEDUNSPECIFIED
Gilli, GabriellaInstituto de Astrofísica de Andalucía (IAA-CSIC), Granada, SpainUNSPECIFIEDUNSPECIFIED
Silva, J.Planetary Atmospheres Group, Institute for Basic Science, Daejeon, South Korea, Daejeon, KoreaUNSPECIFIEDUNSPECIFIED
Espadinha, D.Institute of Astrophysics and Space Sciences, Lisbon, PortugalUNSPECIFIEDUNSPECIFIED
Riu, L.European Space Astronomy Centre, SpainUNSPECIFIEDUNSPECIFIED
Carter, J.Institut d’Astrophysique Spatiale (IAS), CNRS/Université Paris-Sud, Orsay, FranceUNSPECIFIEDUNSPECIFIED
Tirsch, DanielaUNSPECIFIEDhttps://orcid.org/0000-0001-5905-5426UNSPECIFIED
Wilson, C.F.European Space Agency, Noordwijk, The NetherlandsUNSPECIFIEDUNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:2023n8i213p06
Series Name:Bulletin of the American Astronomical Society
Keywords:Mars, atmosphere, clouds, gravity waves, OMEGA, HRSC
Event Title:55th DPS Meeting joint with EPSC
Event Location:San Antonio, TX, USA
Event Type:international Conference
Event Start Date:1 October 2023
Event End Date:15 October 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System, R - Planetary Exploration
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Tirsch, Daniela
Deposited On:19 Dec 2023 10:44
Last Modified:24 Apr 2024 21:02

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