ORE Seminar: Observing the ocean acoustically with the Kauai Beacon source

October 2, 3:30pm - 4:30pm
Mānoa Campus, Zoom Meeting, Please see description for Meeting ID and Passcode

The 75 Hz center-frequency Kauai-Beacon Source is well-situated for observing the North Pacific Ocean acoustically, and ongoing efforts enable transmissions and analysis of broadband signals for this 18-month duration time-series. Previously, we demonstrated acoustic receiving along paths to Wake Island (∼3500 km), Monterey Bay, and OOI near Oregon (∼4000 km). Travel time observations to Wake Island compare well with HYCOM reanalysis data in 2023, but the model does not capture a continuous warming trend observed in 2024. The maximum travel time difference observed to date nominally is 0.5 second. Bathymetric stripping results mostly in SOFAR-channel-only propagation, limiting variability to deeper and non-seasonal energy. We hypothesize that the 2024 North Pacific Ocean El Nino contributes to a significant warming of the assumed stable SOFAR channel. We also discuss progress on sensitivity kernels, our time series repository, tidal correlations, engineering efforts to modernize its infrastructure, and collaboration opportunities. // Kay (Kai) Gemba, Ph.D. Associate Professor, Department of Physics Naval Postgraduate School, Monterey, CA, USA // *Zoom only* Meeting ID: 963 5962 3640 Passcode: OREseminar https://hawaii.zoom.us/j/96359623640


Event Sponsor
Ocean and Resources Engineering, Mānoa Campus

More Information
(808) 956-7572, https://www.soest.hawaii.edu/ore/event/seminar_241002/

Share by email