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Andrey Y. Shcherbina, Miles A. Sundermeyer, Eric Kunze, Eric D’Asaro, Gualtiero Badin, Daniel Birch, Anne-Marie E. G. Brunner-Suzuki, Jörn Callies, Brandy T. Kuebel Cervantes, Mariona Claret, Brian Concannon, Jeffrey Early, Raffaele Ferrari, Louis Goodman, Ramsey R. Harcourt, Jody M. Klymak, Craig M. Lee, M.-Pascale Lelong, Murray D. Levine, Ren-Chieh Lien, Amala Mahadevan, James C. McWilliams, M. Jeroen Molemaker, Sonaljit Mukherjee, Jonathan D. Nash, Tamay Özgökmen, Stephen D. Pierce, Sanjiv Ramachandran, Roger M. Samelson, Thomas B. Sanford, R. Kipp Shearman, Eric D. Skyllingstad, K. Shafer Smith, Amit Tandon, John R. Taylor, Eugene A. Terray, Leif N. Thomas, and James R. Ledwell

. Stirring cascades variance from large scales, where it is produced, to O (1) cm scales, where it is removed by molecular diffusion ( Stern 1975 ). On the mesoscale O (10–100) km, isopycnal stirring by geostrophic eddies is well understood (e.g., Smith and Ferrari 2009 ). Likewise, stirring by microscale (0.01–1 m) isotropic turbulence to the molecular scale has been studied for many decades and its physics is well established. In contrast, the dynamics that control stirring on the submesoscale (0

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Anne-Marie E. G. Brunner-Suzuki, Miles A. Sundermeyer, and M.-Pascale Lelong

forced wave has a nondimensional horizontal wavenumber k = 8, thus providing nearly a decade of inertial range for upscale energy transfer between the forced wavenumber and the gravest mode. In all cases, there is a pronounced increase in vortical mode energy at the gravest mode, consistent with net upscale energy transfer over the course of the runs. In cases with higher wavenumber forcing, and hence greater inertial range, this increase at the gravest mode is consistently accompanied by an

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