Opendata, web and dolomites


Reconciling Scales in Global Seimology

Total Cost €


EC-Contrib. €






 TRANSCALE project word cloud

Explore the words cloud of the TRANSCALE project. It provides you a very rough idea of what is the project "TRANSCALE" about.

observables    smooth    types    structure    north    boundary    waves    entirely    america    consists    data    surface    sampling    despite    evolution    earth    theoretical    asthenosphere    sharp    anisotropic    anisotropy    reflected    separately    questions    discontinuities    bands    patterns    for    model    geophysical    period    first    inverting    see    successes    seismograms    generation    joint    body    modes    algorithmic    seismologists    lithosphere    scattered    converted    models    answer    usually    images    continental    wave    tectonics    amount    history    3d    embraced    scales    localizing    frequency    bayesian    splitting    deformation    flow    mantle    sensitivity    computational    chemical    jointly    understand    depicting    depict    single    interpretation    whereas    normal    constructed    stratification    tomographic    nature    sks    upper    uttermost    plate    seismic    procedure    interpreted    observations    global    multiscale    thermo   

Project "TRANSCALE" data sheet

The following table provides information about the project.


Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 1˙498˙750 €
 EC max contribution 1˙498˙750 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-04-01   to  2022-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

For more than 30 years, seismologists have used seismic waves to produce 3D images of the structure of the Earth. Despite many successes, a number of key questions still remain, which are of the uttermost importance to understand plate tectonics. What is the nature of the Lithosphere-Asthenosphere Boundary? What is the structure and history of the continental lithosphere?

The problem is that different seismic observables sample the Earth at different scales; they have different sensitivity to structure, and are usually interpreted separately. Images obtained from short period converted and reflected body waves see sharp discontinuities, and are interpreted in terms of thermo-chemical stratification, whereas seismic models constructed from long period seismograms depict a smooth and anisotropic upper mantle, and are usually interpreted in terms of mantle flow. However, sharp discontinuities may also produce effective anisotropy at large scales, and only a joint interpretation of different frequency bands can allow to fully localizing the patterns of deformation in the mantle.

The proposed work consists in developing and applying an entirely new approach to geophysical data interpretation, where different data types sampling the Earth at different scales are jointly embraced into a single Bayesian procedure. This proposal focuses on theoretical, algorithmic and computational advances needed for a new generation of tomographic models. We will use the large amount of data available in North-America (surface wave measurements, scattered body waves, SKS splitting measurements) to produce a multiscale model under North-America, depicting both discontinuities and anisotropy. This will allow us to answer some crucial questions about the structure and evolution of Earth. We will also produce a first fully Bayesian global Earth model by jointly inverting normal modes, surface and body wave observations.


year authors and title journal last update
List of publications.
2017 C Alder, T Bodin, Y Ricard, Y Capdeville, E Debayle, J P Montagner
Quantifying seismic anisotropy induced by small-scale chemical heterogeneities
published pages: 1585-1600, ISSN: 0956-540X, DOI: 10.1093/gji/ggx389
Geophysical Journal International 211/3 2019-02-27
2018 Philip W Livermore, Alexandre Fournier, Yves Gallet, Thomas Bodin
Transdimensional inference of archeomagnetic intensity change
published pages: 2008-2034, ISSN: 0956-540X, DOI: 10.1093/gji/ggy383
Geophysical Journal International 215/3 2019-02-27
2019 Rhys Hawkins, Thomas Bodin, Malcolm Sambridge, Gaël Choblet, Laurent Husson
Trans-Dimensional Surface Reconstruction With Different Classes of Parameterization
published pages: , ISSN: 1525-2027, DOI: 10.1029/2018gc008022
Geochemistry, Geophysics, Geosystems 2019-02-27
2018 Nicola Piana Agostinetti, Thomas Bodin
Flexible Coupling in Joint Inversions: A Bayesian Structure Decoupling Algorithm
published pages: 8798-8826, ISSN: 2169-9313, DOI: 10.1029/2018jb016079
Journal of Geophysical Research: Solid Earth 123/10 2019-02-27
2018 N Hedjazian, T Bodin, L Métivier
An optimal transport approach to linearized inversion of receiver functions
published pages: , ISSN: 0956-540X, DOI: 10.1093/gji/ggy419
Geophysical Journal International 2019-02-27

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