Underwater glider observations of submesoscale variability: Processes and predictability
Abstract
Approved for Public Release As a contribution to the Improved Science of Observation, Analysis, and Prediction (iSOAP) Directed Rese arch Initiative, we propose a study to quantify the submesoscale circulation using observations by underwater gliders, and to suppor t improved prediction of the submesoscale through adaptable autonomous surveys. A fleet of six Spray underwater gliders will be used for two overarching purposes: (1) to quantify observable metrics of submesoscale circulation including vorticity and vertical veloc ity, and (2) to participate in observing/modeling system with iSOAP collaborators. We propose to conduct intensive experiments in tw o consecutive years, with the six glider fleet deployed for 3-4 months during each year. Two modes of glider behavior will be used t owards the end of resolving submesoscale processes. First, we will deploy the six glider in parallel lanes separated by 20 km to uni formly cover a region 100 km by 100 km in the horizontal and 1000 m deep inthe vertical. Second, we will assign gliders to follow de nsity surfaces in the region of strong submesoscale variability with the goal of directly measuring the vertical velocity. We envis ion full participation in the iSOAP observing/modeling system including (1) the identification of relevant physical processes and me trics, (2) the establishment of observing requirements and assimilation approaches, (3) the performance of adaptable surveys during observing/modeling intensive periods, and (4) the assessment of results of the system of observations and models. In summary, succes s in this project will be measured by the achievement of both technical and scientific goals.Technical goals:Demonstration of coordi nated submesoscale surveys of fleets of underwater gliders.Development of improved techniques for underwater gliders to follow subsu rface layers.Scientific goals:Quantification of submesoscale diagnostics like vorticity and vertical velocityQuantification of subme soscale three-dimensional flow through direct measurement of glider displacement in neutrally buoyant drift mode.Improved prediction through adaptive autonomous glider surveys.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 20, 2021
- Source ID
- N000142112747
Entities
People
- Daniel L. Rudnick
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego