Abstract
Sea-level variation can be induced by periodic tides, stochastic wind, air pressure, and swell. Larger sea-level variation has the potential to cause coastal disasters. In this paper, real-time continuous data obtained by the Xiaoqushan seafloor observatory in the East China Sea were analyzed employing frequency power spectral and tidal harmonic methods to extract the major components and periodicities of sea-level change. The sea-level anomaly (sla) was calculated by subtracting the tidal components from the observed sea level data. In the study period, the correlation between sla and the local north-south wind speed was high with a correlation coefficient of 0.65 at the 95% confidence level. The local wind-induced sea-level anomaly (slawind) was therefore computed through linear fitting. Although slawind is one of the main components of sla, the residual sea-level anomaly (slaresidual) obtained by subtracting slawind from sla is not zero, suggesting that there are other factors besides wind. Detailed analysis of the sea-level data at the time of the 8.8-magnitude Chilean earthquake on February 27, 2010 showed a peak slaresidual value of 0.48 m at around 15:00 on February 28, which was highly coincident with the tsunami arrival time forecast by the Pacific Tsunami Warning Center. The peak slaresidual event is therefore linked with the tsunami induced by the 2010 Chilean earthquake. This is the first time that a tsunami has been detected using real-time continuous data recorded by a seafloor observatory in the sea off China. Such observations are expected to improve tsunami forecast models and promote the development of a tsunami warning system and a seafloor observatory network in the East China Sea.
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Yang J, Sha W Y, Lu J Z, et al. The characteristics of sea level anomaly in China coastal seas (in Chinese). Mar Forecasts, 2004, 21: 29–36
Zheng D W, Ding X L, Zhou Y H, et al. Premonitory phenomenon El Niño and event reftected in the observations sea level. Chinese Sci Bull, 2000, 45: 2231–2236
Carayannis G P. The earthquake and tsunami of 27 February 2010 in Chile-Evaluation of source mechanism and of near and far-field tsunami effects. Sci Tsunami Hazards, 2010, 29: 96–126
Voit S S. Tsunamis. Ann Rev Fluid Mech, 1987, 19: 217–236
Chen Y, Chen Q F. Indonesian tsunami and the related geophysical phenomena (in Chinese). Prog Geophys, 2005, 20: 112–117
Yang M L. The current status and progress of earthquake induced tsunami warning system (in Chinese). South China J Seismol, 2005, 25: 22–29
Huang Y L, Gao J S. Surges induced by tsunami along Su-Zhe-Hu coasts (in Chinese). J Disaster Prevent Mitigat Eng, 2008, 28: 177–183
Wen R Z, Ren Y F, Zhou Z H, et al. Numerical simulation of the far-filed tsunami (in Chinese). Earthq Eng Eng Vibrat, 2008, 28: 28–34
Yu F J, Yuan Y, Zhao L D, et al. Evaluation of potential hazards from teletsunami in China: Tidal observations of a teletsunami generated by the Chile 8.8 M w earthquake. Chinese Sci Bull, 2011, 56: 1108–1116
Lay T, Kanamori H, Ammon C, et al. The great Sumatra-Andaman earthquake of 26 December 2004. Science, 2005, 308: 1127–1133
Godin O A, V G Irisov, Leben R R, et al. Variation in sea surface roughness induced by the 2004 Sumatra-Andaman tsunami. Nat Hazards Earth Syst Sci, 2009, 9: 1135–1147
Xu H P, Zhang Y W, Xu C W, et al. Coastal seafloor observatory at Xiaoqushan in the East China Sea. Chinese Sci Bull, 2011, 56: 2839–2845
Fang G H, Zheng W Z, Chen Z Y, et al. The Analysis and Forecasting for Tides and Tidal Current (in Chinese). Beijing: Ocean Press, 1986
Du Y, Qi Y Q, Chen J, et al. Analysis on the continuous current measurements obtained from the East China Sea (in Chinese). Ocean Eng, 2003, 21: 95–100
Pawlowicz R, Beardsley B, Lentz S. Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE. Comp Geosc, 2002, 28: 929–937
Hinata H, Kanatsu N, Fujii S. Dependence of wind-driven current on wind stress direction in a small semienclosed, homogeneous rotating basin. J Phys Oceanogr, 2010, 40: 1488–1500
Michelini A, Lauciani V, Selvaggi G. The 2010 Chile Earthquake: Rapid assessments of tsunami. Eos Trans AGU, 2010, 91: 305
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Zhang, Y., Fan, D. & Xu, H. Records of the tsunami induced by the 2010 Chilean earthquake from Xiaoqushan seafloor observatory in the East China Sea. Chin. Sci. Bull. 56, 2957–2965 (2011). https://doi.org/10.1007/s11434-011-4624-7
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DOI: https://doi.org/10.1007/s11434-011-4624-7