@Article{KheraniRoLoSlKlPa:2016:CaSt,
author = "Kherani, Esfhan Alam and Rolland, L. and Lognonne, P. and Sladen,
A. and Klausner, Virg{\'{\i}}nia and Paula, Eurico Rodrigues
de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and {}
and {} and {} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Traveling ionospheric disturbances propagating ahead of the
Tohoku-Oki tsunami: a case study",
journal = "Geophysical Journal International",
year = "2016",
volume = "204",
number = "2",
pages = "1148--1158",
month = "Feb.",
keywords = "Acoustic-gravity waves, Ionosphere/atmosphere interactions,
Tsunamis, Early warning.",
abstract = "We document two kinds of traveling ionospheric disturbances,
namely, CTIDs (Co-tsunami-Traveling-Ionospheric-disturbances) and
ATIDs (Ahead-of-Tsunami-Traveling-Ionospheric-disturbances)
related to the Tohoku-Oki tsunami of 2011 March 11. They are
referred to the disturbances that remain behind and ahead of the
principal tsunami wave front, respectively. We first note their
presence in a numerical experiment performed using a simulation
code coupling the tsunami, atmosphere and ionosphere. This code
uses the tsunami wavefield as an input and simulates
acoustic-gravity waves (AGWs) in the atmosphere and TIDs, in the
form of total electron content (TEC) disturbance, in the
ionosphere. The simulated TEC reveals the excitation of CTIDs (at
about 2 TECU) and ATIDs (at about 1 TECU), representing up to 5
per cent disturbance over the ambient electron density, and they
arise from the dissipation of AGWs in the thermosphere. A novel
outcome is that during the tsunami passage between similar to 6
degrees and 12 degrees of epicentral distance, strong ATIDs arrive
similar to 20-60 min ahead of the tsunami wave front covering
similar to 3 degrees-10 degrees of distance from the tsunami
location. Simulation results are compared with the far-field
observations using GNSS satellites and confirm that ATIDs are the
first detected TEC maximum, occurring 20-60 min ahead of the
tsunami arrival. Our simulation also confirms the presence of
largest TEC maximum representing CTIDs, 10-20 min after the first
tsunami wave. ATIDs reported in this study have characteristics
that can be potentially used for the early warning of the
tsunami.",
doi = "10.1093/gji/ggv500",
url = "http://dx.doi.org/10.1093/gji/ggv500",
issn = "0956-540X",
language = "en",
targetfile = "1_kherani_traveling.pdf",
urlaccessdate = "27 abr. 2024"
}