气候变化领域集成服务门户(CCPortal): Relative Sea-Level Changes Over the Past Centuries in the Central Ryukyu Arc Inferred From Coral Microatolls

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DOI	10.1029/2019JB018466
	Relative Sea-Level Changes Over the Past Centuries in the Central Ryukyu Arc Inferred From Coral Microatolls
	Weil-Accardo J.; Feuillet N.; Satake K.; Goto T.; Goto K.; Harada T.; Kayanne H.; Nakamura M.; Ramos N.; Saurel J.-M.; Sowa K.; Liu S.-C.; Yu T.-L.; Shen C.-C.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	This study focuses on Okinawa and Yoron islands, in order to better understand tectonics in the Ryukyu Arc related to the subduction zone. We used coral microatolls—known for their centimetric accuracy in the record of relative sea-level (RSL) changes—to reconstruct RSL changes over the last century from living microatolls. A fossil microatoll in Yoron was used to discuss possible RSL changes beyond the last century. The signal consists of emergence whose rate varies through time, interrupted by decadal to multidecadal periods of sudden and/or gradual submergence and by interannual sea-level falls. Comparison with other existing RSL records in the arc highlights RSL variability along the arc. This pattern contrasts with the homogeneous and linear absolute regional sea-level rise, implying that this latter signal cannot fully explain our observations and that an additional process is required. We suggest the subduction zone as a possible source for generating centimetric scale RSL changes observed in coral microatolls. We tested how the Ryukyu megathrust could explain our observations with elastic dislocation modeling. The emergence trend could be explained by interseismic loading on the plate interface with a minimum coupling rate of 25%, which is higher than previous estimates based on short instrumental records. As for the submergence events that occurred regularly in the coral record, we show that they could be explained by slow slip events on the shallower part of the megathrust or in the transition zone. Such process could accommodate a significant part of the total convergence. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	coral microatolls; relative sea-level; Ryukyu subduction zone; seismic cycle
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/187993
作者单位	Now at CEREGE, Aix-Marseille University, Aix-en Provence, France; Earthquake Research Institute, University of Tokyo, Tokyo, Japan; Institut de Physique du Globe de Paris, Sorbonne Paris University, Paris-Diderot University, UMR 7154, Paris, France; International Research Institute of Disaster Science, Tohoku University, Sendai, Japan; Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan; Faculty of Science, University of the Ryukyus, Okinawa, Japan; National Institute of Geological Sciences, University of the Philippines-Diliman, Quezon City, Philippines; Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan; Department of Geosciences, National Taiwan University, Taipei, Taiwan, Taiwan; Research Center for Future Earth, National Taiwan University, Taipei, Taiwan, Taiwan
推荐引用方式 GB/T 7714	Weil-Accardo J.,Feuillet N.,Satake K.,et al. Relative Sea-Level Changes Over the Past Centuries in the Central Ryukyu Arc Inferred From Coral Microatolls[J],2020,125(2).
APA	Weil-Accardo J..,Feuillet N..,Satake K..,Goto T..,Goto K..,...&Shen C.-C..(2020).Relative Sea-Level Changes Over the Past Centuries in the Central Ryukyu Arc Inferred From Coral Microatolls.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Weil-Accardo J.,et al."Relative Sea-Level Changes Over the Past Centuries in the Central Ryukyu Arc Inferred From Coral Microatolls".Journal of Geophysical Research: Solid Earth 125.2(2020).