Objective
This proposal is for an integrated development programme aimed at improving the environmental and scientific exploitation of measurements of electromagnetic fields induced in the oceans, and so of providing direct benefits to the environmental and scientific objectives of the MAST III programme. Electric and magnetic fields are induced in the oceans by both natural and artificial sources. Measurements of these induced fields have a wide range of applications in both physical oceanography and geophysics. All applications are linked by identical physics and by the interaction, over a wide range of frequencies, between induced fields in the water column and the underlying earth. Fields induced naturally can result from sources in the ocean itself, or from external sources (such as ionospheric disturbances). Those with the greatest potential applications for oceanographic purposes are from internal sources within the oceans, and relate to the movement of water masses through the earth's magnetic field. Similarly, artificial sources within the ocean, close to the sea floor, can be used in controlled source electromagnetic (CSEM) sounding for geophysical applications. Two rapidly developing areas of technology seek specifically to exploit internal induction in the oceans for scientific and environmental purposes. The first is the use of submarine cables or ocean bottom EM instruments to monitor water mass movements at tidal or longer periods. The second is the CSEM technique, which - while still in an early developmental stage - is already contributing to important advances in marine geoscience. However the continuing development of both of these applications suffers at present from the absence of a computer modelling code, capable of predicting the electric and magnetic fields induced by an arbitrary, 3-Dimensional source in a 3-Dimensionallyvarying electrical resistivity structure.
We propose an integrated, phased and multi-disciplinary programme of research to: i) generate and test a suitable numerical modelling code; (ii) use the code to carry out a series of modelling studies relating to both oceanographic and geophysical uses of natural and artificial sources; and (iii) carry out a demonstration 3-D CSEM experiment on a hydrothermally active site on the ocean floor in European waters, and interpret the results using the newly developed code.
Objective (i) will provide an absolutely essential tool for future exploitation of EM fields in the oceans. Objective (ii) will provide many important new insights into the nature of induction and its applications, and will lead to improved utilisation of existing and future EM measurements for determining and monitoring ocean circulation. Objective (iii) will provide European marine science with a unique instrumental and interpretational capability, unavailable anywhere outside Europe, that has a wide range of scientific, environmental and industrial applications across several sectors. This proposal brings together a new consortium of four European partners with individual expertise in different areas of marine science, in order to promote rapid progress in this important area of technological development and across all of its applications.
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 physical sciences electromagnetism and electronics electromagnetism
- natural sciences earth and related environmental sciences geophysics
- natural sciences earth and related environmental sciences oceanography physical oceanography
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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
SO14 3ZH SOUTHAMPTON
United Kingdom
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