日本地球惑星科学連合2018年大会

講演情報

[EE] Eveningポスター発表

セッション記号 S (固体地球科学) » S-IT 地球内部科学・地球惑星テクトニクス

[S-IT28] The lithosphere and the asthenosphere

2018年5月22日(火) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:Catherine Rychert(University of Southampton)、川勝 均(東京大学地震研究所)、Samer Naif(共同)、Jessica M Warren (University of Delaware)

[SIT28-P06] A probabilistic approach to surface waves tomography of the upper mantle and lithosphere/asthenosphere boundary characterization

*Gaël Burgos1Jean-Paul Montagner1 (1.Institut de Physique du Globe de Paris)

キーワード:Seismology, Tomography, Surface waves, Probabilistic inversion, Lithosphere/asthenosphere boundary

We have developped a non-linear, stochastic inversion procedure to generate 3-D upper mantle models from surface waves dispersion data.
This probabilistic approach is based on the parametrization of models using a (regional of global) optimized basis of smooth functions constructed by principal component analysis of a homogenized reference model.
It provides a reduced and optimized parameter space for the Bayesian inversion of an ensemble of seismic models.
The appraisal of the output ensemble of models allows for lateral regularization and probabilistic characterization of geological features within the model.
We have applied this inversion procedure using CUB (Shapiro & Ritzwoller 2002) as a starting model with an emphasis on the lithosphere/asthenosphere boundary properties.