The HOT Profiler: A Battery-Powered/Inductively-Charged, Satellite-Linked Moored Profiling System for Long Time Series of Rapid Vertical Profiles of Density and Velocity

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The PIs propose to develop and deploy a moored battery pack/communication system that will enable profiling vehicles to measure profiles of temperature (T), salinity (S), velocity, and dissolved oxygen from 80-2500 m each 1.5 hours. The profiler to be used is a tested technology that has the potential to greatly remedy the current gross under-sampling of the ocean. Battery power still limits its endurance: one must either forego resolution of timescales 1 day, or limit total mission length to 46 days. The proposed system will replace the power and communications available from the cabled junction box, allowing the profiler to be used to deliver year-long, internal-wave-resolving profiles at any location. Charging will take 4 hours each 4 days. Two-way Iridium communications will allow real-time data access and upload of commands for adaptive sampling. Broader ImpactsThe broader impacts of the work include the ability to collect high-resolution profiles over extended periods will provide a much-needed tool for understanding a broad range of phenomena in the ocean including but not limited to productivity, carbon cycle and meso-scale circulation. These extended life profilers will be an important asset for remote moorings and well as a key component of cabled observatories.