19, October 2018

ESA Open Invitation to Tender AO9583
Open Date: 17/10/2018
Closing Date: 12/12/2018 13:00:00

Status: ISSUED
Reference Nr.: 18.155.22
Prog. Ref.: EO-Science for Socie
Budget Ref.: E/E105-E5 – EO-Science for Socie
Tender Type: C
Price Range: 200-500 KEURO
Products: Satellites & Probes / Other
Techology Domains: Others
Establishment: ESTEC
Directorate: Directorate of EO Programmes
Department: Science, Applications & Climate Dep.
Division: Earth and Mission Sciences Division
Contract Officer: Aupetit, Irene
Industrial Policy Measure: N/A – Not apply
Last Update Date: 17/10/2018
Update Reason: Tender issue

Due to its very innovative concept and unique data, the full exploitation of Swarm data requires a dedicated effort from both a scientific and an operational perspective. In this context, and in order to maximise the scientific return of the Swarm mission, Swarm+4D Deep-Earth: Core aims at exploring the capabilities of Swarm to better characterise, understand the Core field signals in the measurements in conjunction with other terrestrial and satellite data and to improve models (numerical/physical) of the rapid core dynamics.The strategic priority on short term related to the topic is to get a better understanding of rapid core dynamics and core-mantle coupling mechanisms, and potentially the electrical conductivity of the lowermost mantle. Critical to this objective is the need for mature geomagnetic data assimilation frameworks, possibly based on reduced models, taking advantage of Swarm and other satellite and ground-based magnetic records. Aspects that can be considered focus points are: Physical understanding of interannual to decadal magnetic signals through the development of reduced models of core dynamics; these can be quasi-geostrophic / based on z-averaged equations, or on temporally- filtered models involving stochastic equations. Validation of reduced models against 3D simulations. Implementation of dynamical models into data assimilation frameworks, and tests of their ability to predict SV changes. Modification of the magnetic signal through a conducting mantle, and the possibility for sounding the deep mantle conductivity using the core as a source. Studies of MHD waves in the core and their EM coupling with the mantle, in order to constrain the deep mantle conductivity. Are sudden SV changes (e.g. jerks) phenomena isolated in time (i.e. their shape sharpens as the time resolution increases), or do they only reflect the magnetic field temporal spectrum (i.e. they would be ubiquitous in time with a better temporal resolution)? In the former case there is an absence of similar phenomena in other fields of geophysics, and we lack an understanding of their origin. Couplings between the outer core dynamics, the inner core and non- isotropic anomalies in the mantle (CMB topography, gravity, heat flux, conductivity). This includes sensitivity experiments, looking at the impact of these effects on numerical models. Can deterministic models of core dynamics help isolate the core- generated magnetic signal from that originating in magnetospheric and ionospheric sources, as recorded by satellites (e.g. Swarm) and ground observatories?

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