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@InProceedings{KheraniLognPaulRoll:2013:HySiIo,
               author = "Kherani, Esfhan Alam and Lognonne, Philippe Henri and Paula, 
                         Eurico Rodrigues de and Rolland, Lucie M.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Institute 
                         de Physique du Globe de Paris} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Observatoire de La Cote d’Azur}",
                title = "Hydromagnetic simulation of the ionospheric disturbances generated 
                         by the 2011 Tohoku-oki tsunami and associated acoustic-gravity 
                         waves",
            booktitle = "Abstracts...",
                 year = "2013",
         organization = "AGU Meeting of the Americas.",
             keywords = "Ionosphere atmosphere interactions.",
             abstract = "Owing to the natural disturbances such as Earth quake/tsunami and 
                         tropospheric convection, Acosutic gravity waves (AGWs) are excited 
                         in the troposphere. These AGWs propagates upward to the 
                         thermosphere, attain large amplitude therein and subsequently 
                         dissipate, leading to the excitation of secondary AGWs which 
                         mainly propagate horizontally. Both primary and secondary AGWs 
                         significantly modify the ionosphere, leading to the Total electron 
                         Content disturances, current and magnetic disturbances. Focus of 
                         the present work is the recent Japan tsunami that occurred on 11 
                         March 2011 over Tohoku-Oki and caused enormous damage in terms of 
                         human life and infrastructures. Moreover, it triggered nuclear 
                         catastrophe that makes it a global disaster and much more 
                         alarming. The growing concern is towards failure of short-term 
                         forecasting of this event in spite that the Japan is densely 
                         populated with the various ground based seismic instrument as well 
                         with the GPS receivers that may detect the activities in the space 
                         related to the tsunami. However, owing to these dense networks, 
                         this event is examined much more thoroughly than other big events 
                         in the past, leading to the knowledge of various interesting 
                         aspects that may be helpful in the future for the short-term 
                         forecasting of such event. One such aspect is that the effects of 
                         the seismic activities occurring deep into the ocean, are detected 
                         much more efficiently and in varieties in space (in the overlying 
                         atmosphere and ionosphere) than over the ocean or Earth's surface. 
                         In the present work, hydrodynamic and hydromagnetic simulations of 
                         the atmospheric and ionospheric anomalies are performed for the 
                         Tohoku-Oki tsunami (11 March 2011). The 
                         Tsunami-Atmosphere-Ionosphere (TAI) coupling mechanism via AGWs is 
                         explored theoretically using the TAI coupled model. In this 
                         mechanism, tsunami in the ocean excites the AGWs in the atmosphere 
                         owing to the vertical uplift which subsequently interact with the 
                         ionosphere to gives rise density, electric and magnetic field 
                         disturbances or anomalies. For the modeled tsunami wave as an 
                         input, the coupled model simulates the wind, density and 
                         temperature disturbances or anomalies in the atmosphere and 
                         electron density/magnetic anomalies in the F region of the 
                         ionosphere. Also presented are the GPS-TEC and ground-based 
                         magnetometer measurements during first hour of tsunami and good 
                         agreements are found between modeled and observed anomalies. The 
                         high frequency component \$\sim\$10 minutes of the simulated 
                         wind, TEC and magnetic anomalies in the F region develops within 
                         6-7 minutes after the initiation of the tsunami, suggesting the 
                         importance of monitoring the high-frequency 
                         atmospheric/ionospheric anomalies for the early warning. These 
                         anomalies are found to maximize across the epicenter in the 
                         direction opposite to the tsunami propagation suggesting that the 
                         large atmospheric/ionospheric disturbances are excited in the 
                         region where tsunami does not travel.",
  conference-location = "Cancun, Mexico",
      conference-year = "14-17 Maio",
                label = "self-archiving-INPE-MCTI-GOV-BR",
             language = "en",
           targetfile = "abstract_congresso.pdf",
        urlaccessdate = "17 jan. 2021"
}


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