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Effects of the 2010 Chile and 2011 Japan tsunamis on the Antarctic coastal waters as detected via online mooring system

Published online by Cambridge University Press:  04 July 2012

Jianfeng He*
Affiliation:
The Key Laboratory for Polar Science of State Ocean Administration, Polar Research Institute of China, Shanghai 200136, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Fang Zhang
Affiliation:
The Key Laboratory for Polar Science of State Ocean Administration, Polar Research Institute of China, Shanghai 200136, China
Ling Lin
Affiliation:
The Key Laboratory for Polar Science of State Ocean Administration, Polar Research Institute of China, Shanghai 200136, China
Minghong Cai
Affiliation:
The Key Laboratory for Polar Science of State Ocean Administration, Polar Research Institute of China, Shanghai 200136, China
Haizhen Yang
Affiliation:
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Xiangnan Wang
Affiliation:
National Ocean Technology Center, Tianjin 300112, China

Abstract

Sea level oscillations associated with both the 2010 Chile and 2011 Japan tsunamis were recorded in the coastal waters of King George Island off the west coast of Antarctica with an online coastal mooring system. The Chile tsunami arrived at the detection site within around five hours of the earthquake. The largest wave (84.4 mm) was measured 27 hours after the first arrival. In contrast, the Japan tsunami was detected around 26 hours after the earthquake, and the maximum wave height (180.8 mm) was observed around 11 hours after the initial wave. The energy level of the earthquake and the direction of energy propagation are probably the two most significant causes of the comparatively high amplitudes of the 2011 Japan tsunami, despite the fact that its epicentre was much further away than that of 2010 Chile tsunami. The sea level oscillations associated with the tsunami increased the level of mixing of seawater in the shallow Antarctic coastal waters and influenced the environment temporarily.

Type
Physical Sciences
Copyright
Copyright © Antarctic Science Ltd 2012

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