دورية أكاديمية
Finite-difference numerical modelling of gravito-acoustic wave propagation in a windy and attenuating atmosphere
| العنوان: | Finite-difference numerical modelling of gravito-acoustic wave propagation in a windy and attenuating atmosphere |
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| المؤلفون: | Brissaud, Quentin, Martin, Roland, Garcia, Raphaël F., Komatitsch, Dimitri |
| المساهمون: | Aix-Marseille Université - AMU (FRANCE), Centre National d'Études Spatiales - CNES (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de Provence - Aix-Marseille I (FRANCE), Ecole Centrale Marseille (FRANCE), Université de la Méditerranée - Aix-Marseille II (FRANCE), Laboratoire de Mécanique et d'Acoustique - LMA (Marseille, France) |
| بيانات النشر: | Oxford University Press (OUP) |
| سنة النشر: | 2016 |
| المجموعة: | OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse) |
| مصطلحات موضوعية: | Astrophysique, Acoustic-gravity waves, Wave propagation, Computational seismology, Numerical solutions, Tsunamis, Earthquake ground motions |
| الوصف: | Acoustic and gravity waves propagating in planetary atmospheres have been studied intensively as markers of specific phenomena such as tectonic events or explosions or as contributors to atmosphere dynamics. To get a better understanding of the physics behind these dynamic processes, both acoustic and gravity waves propagation should be modelled in a 3D attenuating and windy atmosphere extending from the ground to the upper thermosphere. Thus, in order to provide an efficient numerical tool at the regional or global scale we introduce a finite difference in the time domain (FDTD) approach that relies on the linearized compressible Navier-Stokes equations with a background flow (wind). One significant benefit of such a method is its versatility because it handles both acoustic and gravity waves in the same simulation, which enables one to observe interactions between them. Simulations can be performed for 2D or 3D realistic cases such as tsunamis in a full MSISE- atmosphere or gravity-wave generation by atmospheric explosions. We validate the computations by comparing them to analytical solutions based on dispersion relations in specific benchmark cases: an atmospheric explosion, and a ground displacement forcing. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://oatao.univ-toulouse.fr/14536/1/Brissaud_14536.pdfTest; Brissaud, Quentin and Martin, Roland and Garcia, Raphaël F. and Komatitsch, Dimitri. Finite-difference numerical modelling of gravito-acoustic wave propagation in a windy and attenuating atmosphere. (2016) Geophysical Journal International, 206 (1). 308-327. ISSN 0956-540X |
| DOI: | 10.1093/gji/ggw121 |
| الإتاحة: | https://doi.org/10.1093/gji/ggw121Test https://oatao.univ-toulouse.fr/14536Test/ https://oatao.univ-toulouse.fr/14536/1/Brissaud_14536.pdfTest |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.DDB3FAC0 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/gji/ggw121 |
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