SODA: Polar Ocean Positioning (SODA-POP)
Abstract
This proposal is submitted for the Stratified Ocean Dynamics in the Arctic (SODA) DRI in conjunction with the proposal submitted by APL/UW entitled An Annual Cycle of Atmosphere-Ice-Ocean Interactions using Autonomous Platforms and the accompanying proposals from Jim Thomson and Martin Doble. This particular proposal is to provide the acoustic beacons and updated acoustic receivers for the UW Seagliders so that they can navigate in real-time throughout the winter under Arctic ice in the Beaufort Sea. The approach is based on that used for the Marginal Ice Zone (MIZ) DRI, but with some important differences. The success of that project was due in part to the number and distribution of sensors on the ice, combined with the use of gliders profiling both in open water and in the MIZ. The APL/UW Seagliders utilized open-water detection to surface in available leads even in fairly dense ice cover, and performed real-time navigation using the WHOI acoustic sources that were drifting with the ice. Ranges of more than 400 km were achieved, and the excellent results are attributed to the very phenomena that SODA intends to study: the structure and dynamics of the stratified layers in the upper water column in the Arctic (Webster, 2015; Freitag, 2015). The work included in this proposal includes redesign of several subsystems of the acoustic navigation subsystem to support their deployment on both the highly-instrumented moorings and separate dedicated navigation moorings. The new work includes accurate clocks that can operate for a full year, additional energy storage for the moorings and compact, low-drag packaging for use on the very tall moorings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 23, 2023
- Accession Number
- AD1191448
Entities
People
- Lee Freitag
Organizations
- Woods Hole Oceanographic Institution