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Atmospheric gravity waves due to the Tohoku-Oki tsunami observed in the thermosphere by GOCE

Garcia, Raphaël F. and Doornbos, Eelco and Bruinsma, Sean and Hebert, Hélène Atmospheric gravity waves due to the Tohoku-Oki tsunami observed in the thermosphere by GOCE. (2014) Journal of Geophysical Research: Atmospheres, 119 (8). 4498-4506. ISSN 2169-897X

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2013JD021120/full


Oceanic tsunami waves couple with atmospheric gravity waves, as previously observedthrough ionospheric and airglow perturbations. Aerodynamic velocities and density variations are computed from Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) accelerometer and thruster data during Tohoku-Oki tsunami propagation. High-frequency perturbations of these parameters are observed during three expected crossings of the tsunami-generated gravity waves by the GOCE satellite. From theoretical relations between air density and vertical and horizontal velocities inside the gravity wave, we demonstrate that the measured perturbations are consistent with a gravity wave generated by the tsunami and provide a way to estimate the propagation azimuth of the gravity wave. Moreover, because GOCE measurements can constrain the wave polarization, a marker (noted C 3) of any gravity wave crossing by the GOCE satellite is constructed from correlation coefficients between the observed atmospheric state parameters. These observations validate a new observation tool of thermospheric gravity waves generated by tsunamis above the open ocean.

Item Type:Article
HAL Id:hal-01110883
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Delft University of Technology - TU Delft (NETHERLANDS)
Other partners > Météo France (FRANCE)
Laboratory name:
Deposited On:29 Jan 2015 09:54

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