气候变化领域集成服务门户(CCPortal): Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California

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DOI	10.1029/2021JB021648
	Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California
	Wang K.; Yang Y.; Jiang C.; Wang Y.; Tong P.; Liu T.; Liu Q.
发表日期	2021
ISSN	21699313
卷号	126 期号:6
英文摘要	Adjoint tomography has been recently applied to ambient seismic noise and teleseismic P waves separately to unveil fine-scale lithospheric structures beyond the resolving ability of traditional ray-based traveltime tomography. In this study, we propose an inversion scheme that alternates between frequency-dependent traveltime inversions of ambient noise surface waves and waveform inversions of teleseismic P waves to take advantage of their complementary sensitivities to the Earth's structure. We apply our method to ambient noise empirical Green's functions from 60 virtual sources, direct P and scattered waves from 11 teleseismic events recorded by a dense linear array (∼7 km station spacing) and other regional stations (∼40 km average station spacing) in central California. To evaluate the performance of the method, we compare tomographic results from ambient noise adjoint tomography, full-waveform inversion of teleseismic P waves, and the alternating inversion of the two data sets. Both applications to practical field data sets and synthetic checkerboard tests demonstrate the advantage of the alternating inversion over individual inversions as it combines the complementary sensitivities of the two independent data sets toward a more unified model. The three dimensional model from our alternating inversion not only shows major features of velocity anomalies and discontinuities in agreement with previous studies, but also reveals small-scale heterogeneities which provide new constraints on the geometry of the Isabella Anomaly and mantle dynamic processes in central California. The proposed alternating inversion scheme can be applied to other regions with similar array deployments for high-resolution lithospheric imaging. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	adjoint tomography; ambient noise; full-waveform inversion; joint inversion; scatterred waves; subduction zone
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/187090
作者单位	Department of Earth and Environmental Sciences, Macquarie University, Sydney, Australia; Department of Physics, University of Toronto, Toronto, Canada; Research School of Earth Sciences, The Australian National University, Canberra, Australia; State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Tecnology, Chinese Academy of Sciences, Wuhan, China; School of Physical and Mathematical Sciences, Division of Mathematical Sciences, Nanyang Technological University, Singapore, Singapore; Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; Department of Earth Sciences, University of Toronto, Toronto, Canada
推荐引用方式 GB/T 7714	Wang K.,Yang Y.,Jiang C.,et al. Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California[J],2021,126(6).
APA	Wang K..,Yang Y..,Jiang C..,Wang Y..,Tong P..,...&Liu Q..(2021).Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California.Journal of Geophysical Research: Solid Earth,126(6).
MLA	Wang K.,et al."Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California".Journal of Geophysical Research: Solid Earth 126.6(2021).