Records of the tsunami induced by the 2010 Chilean earthquake from Xiaoqushan seafloor observatory in the East China Sea
Records of the tsunami induced by the 2010 Chilean earthquake from Xiaoqushan seafloor observatory in the East China Sea
复制标题
东海小曲山海底观测站对2010年智利地震引发海啸的记录
DOI：
10.1007/s11434-011-4624-7
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发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
Zhang YanWei
中科院分区：
文献类型：
--
作者：
Fan DaiDu;Xu HuiPing;Zhang YanWei
海平面变化可以由周期性潮汐、随机风、气压和海浪引起。更大的海平面变化有可能造成沿海灾害。利用东海小曲山海底观测站的实时连续观测资料，采用频率功率谱和潮汐谐波分析方法，提取海平面变化的主要分量和周期性。海平面异常（sla）是通过从观测的海平面数据中减去潮汐分量来计算的。在研究期间，sla与当地南北风速的相关性很高，在95%置信水平下的相关系数为0.65。因此，通过线性拟合计算本地风引起的海平面异常（slawind）。虽然偏风是sla的主要分量之一，但从sla中减去偏风得到的剩余海平面距平（sleradicate）并不为零，这表明除风外还有其它因素。详细分析2010年2月27日智利8.8级地震发生时的海平面资料，发现2010年2月28日15：00左右的海平面峰值余值为0.48 m，与太平洋海啸预警中心预测的海啸到达时间高度吻合。因此，最大的海啸残留事件与2010年智利地震引发的海啸有关。这是第一次利用中国近海海底观测站记录的实时连续数据探测到海啸。预计这些观测将改进海啸预报模型，促进海啸预警系统和东海海底观测网的发展。
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 slawindis one of the main components of sla, the residual sea-level anomaly (slaresidual) obtained by subtracting slawindfrom 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 slaresidualvalue 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 slaresidualevent 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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影响因子：
--
作者：
D. Zheng;X. Ding;Yonghong Zhou;Yongqi Chen;Zhilin Li;X. Liao
通讯作者：
D. Zheng;X. Ding;Yonghong Zhou;Yongqi Chen;Zhilin Li;X. Liao
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
G. Pararas-Carayannis
通讯作者：
G. Pararas-Carayannis
影响因子：
4.4
作者：
Pawlowicz, R;Beardsley, B;Lentz, S
通讯作者：
Lentz, S
影响因子：
--
作者：
Fujiang Yu;Ye Yuan;Lianda Zhao;Peitao Wang
通讯作者：
Fujiang Yu;Ye Yuan;Lianda Zhao;Peitao Wang
影响因子：
3.5
作者：
H. Hinata;N. Kanatsu;S. Fujii
通讯作者：
H. Hinata;N. Kanatsu;S. Fujii