NEMO Data Analysis and Environmental System Data Collection in Alternate Location Plan

Alexander Soloviev


The Navy Electromagnetic Observatory (NEMO) is under development at the South Florida Ocean Measurement Facility (SFOMF). The strong western boundary current interacting with a steep and narrow continental shelf results in a very energetic ocean environment, which provides a unique setting for studying the electromagnetic signature of various oceanographic processes including internal wave solitons in a wide range of temporal and spatial scales. The new observatory, NEMO, succeeds the previous successful electromagnetic research at this location. NEMO is designed to provide the observations required for development and verification of the new generation of magnetohydrodynamics (MHD) models and algorithms for the noise reduction in naval magnetic surveillance systems. Though the NEMO results will be applicable to other western boundary current systems (Kuroshio Current, Agulhas Current), a plan will be developed in this project for data collection and the model verification in alternate environmental conditions. The Physical Oceanography Laboratory at Nova Southeastern University’s Oceanographic Center conducted observational, computational, and theoretical studies in oceanography and magnetohydrodynamics from 1998 through 2020 in support of the US Navy. The long-term goal of this project is to support the development and validation of the MHD model of internal waves at the SFOMF range and planning the model assessment in alternate ocean conditions. Respectively, our specific scientific objectives are as follows: • Verify the MHD model with data from Navy Electromagnetic Observatory (NEMO) in the Straits of Florida. • Identify suitable locations and plan deployment of the portable environmental data collection system, developed on a previous project, for the purpose of the MHD model validation in alternate environmental conditions. Two distinct three-month data collections will be made by NEMO, the data sets will be processed and cleaned as needed and shared with Nova Southeastern University (NSU) for modeling. NSWC personnel will work closely with NSU on this tasking and conduct their own noise assessments with results documented in a final report. The Navy and NSU will work together to identify suitable alternate locations to deploy the portable environmental data collection system. Assessments of potential sites will be presented to the technical community, and a single site will be selected. A detailed testing plan, including logistics, deployment, data collection, schedule, and cost will be developed for the selected site such that the plan could be put into action when future funding is identified. The anticipated outcome of the research is an advanced MHD model verified in the western boundary current (Florida Current) and at an alternate location with different environmental conditions. Potential applications of the results of this study for DoD include locating underwater vehicles from aircraft. Other applications involve geophysical prospecting for oil and minerals under the seafloor and for archeological investigations, and environmental assessment studies.