FN Archimer Export Format
PT J
TI High Resolution Altimetry Reveals New Characteristics of the December 2004 Indian Ocean Tsunami
BT 
AF ABLAIN, Michaël
   DORANDEU, Joël
   LE TRAON, Pierre-Yves
   SLADEN, Anthony
AS 1:1;2:1;3:2;4:3;
FF 1:;2:;3:PDG-DPS-LOS;4:;
C1 Collecte Localisat Satellites, Space Oceanog Div, F-31526 Ramonville St Agne, France.
   IFREMER, Ctr Brest, F-29280 Plouzane, France.
   CEA, DASE, LDG, RSG, F-91680 Bruyeres Le Chatel, France.
C2 CLS, FRANCE
   IFREMER, FRANCE
   CEA, FRANCE
SI BREST
SE PDG-DPS-LOS
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 2.602
TC 28
UR https://archimer.ifremer.fr/doc/2006/publication-1174.pdf
LA English
DT Article
DE ;Wave analysis;Tsunamis;Earthquakes;Sea level changes;Satellite altimetry
AB The Indian Ocean tsunami, which occurred on December 26, 2004, was the first to be clearly observed using satellite altimeters. The wave amplitude observed in deep-ocean by TOPEX and Jason-1 was close to 60 cm about 2 hours after the earthquake. Envisat crossed the tsunami wave 3h15 after the earthquake and measured a 35 cm wave. Even though it flew over the tsunami 7h20 after the earthquake, GFO still observed a wave close to 20 cm. To better extract the tsunami signal from altimeter measurements, a specific ocean variability mapping technique is used. This technique proves to be mandatory for discriminating tsunami waves from other ocean signals. Altimeter signals are then compared with those derived from the CEA (Commissariat à l'Energie Atomique) model outputs. For the first time with altimeter data, peculiar short wavelengths signals along Jason-1 and Envisat profiles have been detected from the analysis of 20-Hz altimeter measurements. Such high wavenumber signals can be explained by the dispersive propagation of tsunami waves. These observations highlight the essential role of satellite altimeter measurements to better understand and to improve models of tsunami wave propagation and dissipation.
PY 2006
PD SEP
SO Geophysical Research Letters ( GRL )
SN 0094-8276
PU American Geophysical Union
VL 33
IS 21
UT 000241865900005
DI 10.1029/2006GL027533
ID 1174
ER

EF