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Global propagation of gravity waves generated with the whole atmosphere transfer function model.

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Title: Global propagation of gravity waves generated with the whole atmosphere transfer function model.
Authors: Mayr, Hans G.1,2 hans.mayr@jhuapl.edu, Talaat, Elsayed R.1, Wolven, Brian C.1
Source: Journal of Atmospheric & Solar-Terrestrial Physics. Nov2013, Vol. 104, p7-17. 11p.
Subjects: Gravity waves, Atmospheric models, General circulation model, Transfer functions, Simulation methods & models, Spherical harmonics
Abstract: Abstract: A brief review is presented of the Transfer Function Model (TFM) [e.g., Mayr et al., Space Science Reviews, 1990], which describes acoustic gravity waves (AGW) that propagate across the globe in a dissipative and static (no winds) background atmosphere with globally uniform temperature and density variations extending from the ground to 700km. Unique among existing models, the TFM can be placed between the analytical approach on one end, and the rigorous numerical approach of general circulation models (GCM). The time consuming numerical integration of the conservation equations is restricted to compute the transfer function (TF) for a broad range of frequencies and spherical harmonics. Given TF, the atmospheric response for a chosen source configuration is then obtained in short order. Computationally efficient, the model is well suited to serve as experimental and educational tool for simulating propagating wave patterns across the globe. By design, the TFM is also semi-analytical and therefore well suited to explore the different wave modes that can be generated under different dynamical conditions. [Copyright &y& Elsevier]
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Database: Engineering Source
Description
Abstract:Abstract: A brief review is presented of the Transfer Function Model (TFM) [e.g., Mayr et al., Space Science Reviews, 1990], which describes acoustic gravity waves (AGW) that propagate across the globe in a dissipative and static (no winds) background atmosphere with globally uniform temperature and density variations extending from the ground to 700km. Unique among existing models, the TFM can be placed between the analytical approach on one end, and the rigorous numerical approach of general circulation models (GCM). The time consuming numerical integration of the conservation equations is restricted to compute the transfer function (TF) for a broad range of frequencies and spherical harmonics. Given TF, the atmospheric response for a chosen source configuration is then obtained in short order. Computationally efficient, the model is well suited to serve as experimental and educational tool for simulating propagating wave patterns across the globe. By design, the TFM is also semi-analytical and therefore well suited to explore the different wave modes that can be generated under different dynamical conditions. [Copyright &y& Elsevier]
ISSN:13646826
DOI:10.1016/j.jastp.2013.08.001