Mapping ocean surface salinity using low-frequency radio signals

The lack of ocean surface salinity data, particularly at high latitude, is highlighted internationally as a significant block on the understanding, and prediction of the effects of rapid climate change. This project will determine the feasibility of measuring ocean salinity by the reception and processing of signals from low-frequency (eLoran) radio navigation beacons. This will involve the deployment of an array of eLoran receivers (developed at the University of Bath), whose data will then be used to provide maps of ocean surface salinity (using tomography methods). This will lay the foundation for a much larger future network of such receivers which will routinely deliver maps of ocean salinity. The measurement principle is that the surface conductivity (which depends on ocean salinity) along the path from the transmitter to the receiver introduces a small delay in addition to the delay that might be expected due to the distance alone. By accurately timing this delay, the surface conductivity and, hence, salinity along the path can be found. Tomography methods will then allow the mapping of this salinity.

Applicants are invited to work on any aspect of the project; receiver development, signal processing, precise timing, or data validation. Candidates will be considered from any relevant discipline e.g., Electrical and Electronic Engineering, Physics, Applied Mathematics etc.
Prospective candidates are encouraged to contact Dr Ivan Astin directly for further details.