Distributed Measurements of Mixing in NISKINE
Abstract
Meso- and submeso-scale gradients in mixed layer depth and strafication can lead to conver-gences and divergences during near-inertial wave (NIW) generation and evolution. Indirectevidence suggests that these can become highly nonlinear and dissipative, yet the mechanisms by which these energy transfers occur have remained elusive. Here, we propose ameasurement program focused on turbulent mixing associated with NIWs. Through in-tegration with other DRI components these measurements will allow for quantification ofdissipative processes, thereby providing insight into the dynamics and energetics of NIW in the presence of small-scale lateral gradients. Specifically, we propose two complementary setsof measurements: (1) intensive, spatially-distributed mixing measurements to complement funded shipboard and autonomous measurements to examine the detailed structures of NIW-related gra-dients, and longer time series of mixing that complement moored measurements to identify the processes through which NIW dynamics dissipate and scatter energy from their relativelynarrow-band source. The first effort will be achieved through integration of GusT sensors (20) on ship-based, autonomous, or drifting platforms, which are supported through other DRI investigators. The second effort will be achieved through deployment of xpods and potentially Ppods on existing moorings, including ongoing coastal moorings maintained by the Marine Resource Institute of Iceland (MRII; Hedinn Valdimarsson), DRI-funded moorings and/or Irminger Basin moorings maintained by the Netherlands (Femke de Jonge, NIOZ). We also plan todeploy two _SOLO oats, funded independently through the ONR 322PO (N00014-17-1-2700).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 04, 2018
- Source ID
- N000141812788
Entities
People
- James N. Moum
Organizations
- Office of Naval Research
- Oregon State University
- United States Navy