气候变化领域集成服务门户(CCPortal): Bayesian Elastic Full-Waveform Inversion Using Hamiltonian Monte Carlo

CCPortal

DOI	10.1029/2019JB018428
	Bayesian Elastic Full-Waveform Inversion Using Hamiltonian Monte Carlo
	Gebraad L.; Boehm C.; Fichtner A.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	We present a proof of concept for Bayesian elastic full-waveform inversion in 2-D. This is based on (1) Hamiltonian Monte Carlo sampling of the posterior distribution, (2) the computation of misfit derivatives using adjoint techniques, and (3) a mass matrix tuning of the Hamiltonian Monte Carlo algorithm that accounts for the different sensitivities of seismic velocities and density. We apply our method to two synthetic end-member scenarios with different dimension D that are particularly relevant in the context of full-waveform inversion: low-dimensional models (D < 100) with potentially large variations in material parameters and high-dimensional models (D > 30,000) describing smaller-scale variations of lower amplitude relative to some background. For both end members, the Hamiltonian Monte Carlo sampling reliably recovers important aspects of the posterior, including means, covariances, skewness, and 1-D and 2-D marginals. Depending on the strength of material variations, the posterior can be significantly non-Gaussian. This suggests to replace local methods for uncertainty quantification based on Gaussian assumptions by proper sampling of the posterior. In addition to P wave and S wave velocity, the sampling provides constraints on density structure that are free from subjective regularization artifacts. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bayesian inference; elastic wave propagation; full-waveform inversion; Hamiltonian Monte Carlo; Markov chain Monte Carlo
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/187914
作者单位	Institute of Geophysics, ETH Zürich, Zürich, Switzerland
推荐引用方式 GB/T 7714	Gebraad L.,Boehm C.,Fichtner A.. Bayesian Elastic Full-Waveform Inversion Using Hamiltonian Monte Carlo[J],2020,125(3).
APA	Gebraad L.,Boehm C.,&Fichtner A..(2020).Bayesian Elastic Full-Waveform Inversion Using Hamiltonian Monte Carlo.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Gebraad L.,et al."Bayesian Elastic Full-Waveform Inversion Using Hamiltonian Monte Carlo".Journal of Geophysical Research: Solid Earth 125.3(2020).