Finite-Difference Modeling of Acoustic and Gravity Wave Propagation in Mars Atmosphere: Application to Infrasounds Emitted by Meteor Impacts
Raphael Garcia
(1, 2)
,
Quentin Brissaud
(1)
,
Lucie Rolland
(3)
,
Roland Martin
(4)
,
Dimitri Komatitsch
(5)
,
Aymeric Spiga
(6)
,
Philippe Lognonné
(7)
,
Bruce Banerdt
(8)
1
DEOS -
Département Electronique, Optronique et Signal
2 IRAP - Institut de recherche en astrophysique et planétologie
3 GEOAZUR 7329 - Géoazur
4 GET - Géosciences Environnement Toulouse
5 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
6 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
7 IPGP - Institut de Physique du Globe de Paris
8 JPL - Jet Propulsion Laboratory
2 IRAP - Institut de recherche en astrophysique et planétologie
3 GEOAZUR 7329 - Géoazur
4 GET - Géosciences Environnement Toulouse
5 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
6 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
7 IPGP - Institut de Physique du Globe de Paris
8 JPL - Jet Propulsion Laboratory
Quentin Brissaud
- Fonction : Auteur
- PersonId : 777551
- ORCID : 0000-0001-8189-4699
- IdRef : 22127510X
Lucie Rolland
- Fonction : Auteur
- PersonId : 184256
- IdHAL : lucie-rolland
- ORCID : 0000-0002-5197-963X
Roland Martin
- Fonction : Auteur
- PersonId : 738489
- IdHAL : roland-martin
- IdRef : 174921993
Dimitri Komatitsch
- Fonction : Auteur
- PersonId : 8108
- IdHAL : dimitri-komatitsch
- ORCID : 0000-0003-2309-8269
- IdRef : 107982633
Aymeric Spiga
- Fonction : Auteur
- PersonId : 20900
- IdHAL : aymeric-spiga
- ORCID : 0000-0002-6776-6268
- IdRef : 133298116
Philippe Lognonné
- Fonction : Auteur
- PersonId : 1190117
- IdHAL : philippe-lognonne
- ORCID : 0000-0002-1014-920X
- IdRef : 070462100
Résumé
The propagation of acoustic and gravity waves in planetary atmospheres is strongly dependent on both wind conditions and attenuation properties. This study presents a finite-difference modeling tool tailored for acoustic-gravity wave applications that takes into account the effect of background winds, attenuation phenomena (including relaxation effects specific to carbon dioxide atmospheres) and wave amplification by exponential density decrease with height. The simulation tool is implemented in 2D Cartesian coordinates and first validated by comparison with analytical solutions for benchmark problems. It is then applied to surface explosions simulating meteor impacts on Mars in various Martian atmospheric conditions inferred from global climate models. The acoustic wave travel times are validated by comparison with 2D ray tracing in a windy atmosphere. Our simulations predict that acoustic waves generated by impacts can refract back to the surface on wind ducts at high altitude. In addition, due to the strong nighttime near-surface temperature gradient on Mars, the acoustic waves are trapped in a waveguide close to the surface, which allows a night-side detection of impacts at large distances in Mars plains. Such theoretical predictions are directly applicable to future measurements by the INSIGHT NASA Discovery mission.
Domaines
AutreFormat du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Finite-Difference Modeling of Acoustic and Gravity Wave Propagation in Mars Atmosphere: Application to Infrasounds Emitted by Meteor Impacts
|
Résumé |
en
The propagation of acoustic and gravity waves in planetary atmospheres is strongly dependent on both wind conditions and attenuation properties. This study presents a finite-difference modeling tool tailored for acoustic-gravity wave applications that takes into account the effect of background winds, attenuation phenomena (including relaxation effects specific to carbon dioxide atmospheres) and wave amplification by exponential density decrease with height. The simulation tool is implemented in 2D Cartesian coordinates and first validated by comparison with analytical solutions for benchmark problems. It is then applied to surface explosions simulating meteor impacts on Mars in various Martian atmospheric conditions inferred from global climate models. The acoustic wave travel times are validated by comparison with 2D ray tracing in a windy atmosphere. Our simulations predict that acoustic waves generated by impacts can refract back to the surface on wind ducts at high altitude. In addition, due to the strong nighttime near-surface temperature gradient on Mars, the acoustic waves are trapped in a waveguide close to the surface, which allows a night-side detection of impacts at large distances in Mars plains. Such theoretical predictions are directly applicable to future measurements by the INSIGHT NASA Discovery mission.
|
Auteur(s) |
Raphael Garcia
1, 2
, Quentin Brissaud
1
, Lucie Rolland
3
, Roland Martin
4
, Dimitri Komatitsch
5
, Aymeric Spiga
6
, Philippe Lognonné
7
, Bruce Banerdt
8
1
DEOS -
Département Electronique, Optronique et Signal
( 106890 )
- ISAE - 10 av. Edouard Belin - BP 54032 - 31055 TOULOUSE Cedex 4
- France
2
IRAP -
Institut de recherche en astrophysique et planétologie
( 135748 )
- 9 avenue Colonel Roche 31028 Toulouse
- France
3
GEOAZUR 7329 -
Géoazur
( 239385 )
- 250 rue Albert Einstein, Sophia Antipolis 06560 VALBONNE
- France
4
GET -
Géosciences Environnement Toulouse
( 151875 )
- Observatoire Midi-Pyrénées 14 Avenue Edouard Belin 31400 Toulouse
- France
5
LMA -
Laboratoire de Mécanique et d'Acoustique [Marseille]
( 136844 )
- 4 impasse Nikola Tesla
CS 40006
13453 Marseille Cedex 13
- France
6
LMD -
Laboratoire de Météorologie Dynamique (UMR 8539)
( 143 )
- LMD ENS 24 Rue Lhomond 75231 Paris Cedex 05
- France
7
IPGP -
Institut de Physique du Globe de Paris
( 250059 )
- IPGP, 1 rue Jussieu, 75238 Paris cedex 05 ; Université Paris Diderot, Bât. Lamarck A case postale 7011, 75205 Paris CEDEX 13
- France
8
JPL -
Jet Propulsion Laboratory
( 61129 )
- 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA
- États-Unis
|
Volume |
vol. 211
|
Numéro |
n° 1-4
|
Page/Identifiant |
pp. 547-570
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2017-10
|
Domaine(s) |
|
Mots-clés |
en
Atmosphere, InSight mission, Mars, Acoustic waves, Gravity waves, Impacts, Pressure sensor, Numerical modeling
|
DOI | 10.1007/s11214-016-0324-6 |
OATAO | 17286 |
Origine :
Fichiers produits par l'(les) auteur(s)
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