Objective
The geomagnetic field is generated by fluid flow in the metallic liquid outer core, a process known as the geodynamo. Due to its current strength and mainly dipolar geometry, this field efficiently organizes the way particles flow in the vicinity of the Earth, preventing them from directly reaching the atmosphere. Currently however, the geomagnetic dipole decays 10 times faster than the free decay rate. Understanding the mechanisms responsible for this rapid evolution is then both a practical issue - predicting the future morphology of the magnetosphere and areas of danger in space - and a fundamental one - understanding the inner working of the geodynamo.
This proposal aims at studying the possible influence of core-mantle interactions in defining the main characteristics of the current geomagnetic field, and the mechanisms governing its evolution. To achieve this, we will combine geomagnetic data analysis, dynamo simulations, and seismic imaging. Such an approach is now accessible for extensive studies, thanks to the availability of more and more high quality geomagnetic and seismological observations, and of much more affordable numerical dynamo codes. Geomagnetic secular variation (SV) data will be inverted for flow models below the core-mantle boundary. Lower mantle tomography data will be used to infer density anomalies and mantle-driven thermal wind flows at the top of the core. Numerical dynamo simulations will be used to model core flow driven by convection at the outer core.
Comparisons between all those flow models will be used to infer mantle control on core flow. Geomagnetic data and core flow models will otherwise be used to compute contributions of meridional advection, radial diffusion and meridional diffusion to the decrease of the geomagnetic dipole moment. A similar analysis will be done on numerical dynamo simulations. The two approaches will be combined to identify and quantify dynamo mechanisms of dipole moment decrease.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences computer and information sciences data science
- natural sciences physical sciences astronomy planetary sciences planets
- natural sciences mathematics pure mathematics geometry
You need to log in or register to use this function
Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2005-MOBILITY-5
See other projects for this call
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
PARIS
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.