气候变化领域集成服务门户(CCPortal): A Tsunami Warning System Based on Offshore Bottom Pressure Gauges and Data Assimilation for Crete Island in the Eastern Mediterranean Basin

CCPortal

DOI	10.1029/2020JB020293
	A Tsunami Warning System Based on Offshore Bottom Pressure Gauges and Data Assimilation for Crete Island in the Eastern Mediterranean Basin
	Wang Y.; Heidarzadeh M.; Satake K.; Mulia I.E.; Yamada M.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	The Eastern Mediterranean Basin (EMB) is under the threat of tsunami events triggered by various causes including earthquakes and landslides. We propose a deployment of Offshore Bottom Pressure Gauges (OBPGs) around Crete Island, which would enable tsunami early warning by data assimilation for disaster mitigation. Our OBPG network consists of 12 gauges distributed around Crete Island, with a 100-km interval, based on three criteria to select the locations. The station network must have a good azimuthal coverage and have enough (>50 km) distance from the coast, and the OBPGs are placed at the locations where the most energetic wave dynamics occur, which is confirmed by Empirical Orthogonal Function (EOF) analysis of pre-calculated tsunami scenarios. We demonstrate three test cases comprising a hypothetical seismogenic tsunami in east Sicily, a hypothetical landslide tsunami in the Aegean Sea, and the real tsunami event of the May 2020 off the Crete earthquake. Our designed OBPG network achieves an accuracy of 88.5% for the hypothetical seismogenic tsunami and 87.3% for the hypothetical landslide tsunami with regard to the forecasting of first tsunami peak. For the real event of May 2020, it predicts the tsunami arrival at tide gauge NOA-04 accurately; the observed and forecasted amplitudes of the first wave are 5.0 cm and 4.5 cm, respectively. The warning lead time for the May 2020 event was ~10 min. Therefore, our results reveal that the assimilation of OBPG data can satisfactorily forecast the amplitudes and arrival times for tsunamis in the EMB. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	2020 off the Crete Earthquake; Crete Island; landslide tsunami; Offshore Bottom Pressure Gauge; tsunami data assimilation; tsunami warning system
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187528
作者单位	Earthquake Research Institute, The University of Tokyo, Tokyo, Japan; Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, United Kingdom; Department of Geology, Faculty of Science, Shinshu University, Nagano, Japan
推荐引用方式 GB/T 7714	Wang Y.,Heidarzadeh M.,Satake K.,et al. A Tsunami Warning System Based on Offshore Bottom Pressure Gauges and Data Assimilation for Crete Island in the Eastern Mediterranean Basin[J],2020,125(10).
APA	Wang Y.,Heidarzadeh M.,Satake K.,Mulia I.E.,&Yamada M..(2020).A Tsunami Warning System Based on Offshore Bottom Pressure Gauges and Data Assimilation for Crete Island in the Eastern Mediterranean Basin.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Wang Y.,et al."A Tsunami Warning System Based on Offshore Bottom Pressure Gauges and Data Assimilation for Crete Island in the Eastern Mediterranean Basin".Journal of Geophysical Research: Solid Earth 125.10(2020).