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The influence of high-resolution wind forcing on the power input to near-inertial waves in the ocean

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Rimac,  Antonija
Ocean Statistics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society;

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von Storch,  Jin Song
Ocean Statistics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Haak,  Helmuth
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Citation

Rimac, A., von Storch, J. S., Eden, C., & Haak, H. (2013). The influence of high-resolution wind forcing on the power input to near-inertial waves in the ocean. Geophysical Research Letters, 40, 4882-4886. doi:10.1002/grl.50929.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-5B23-8
Abstract
The wind power input to near-inertial (NI) motions is studied using a global eddy-permitting ocean general circulation model. The model is forced by high- (1-hourly, at 0.35° resolution) and low-resolution (6-hourly, at 1.875° resolution) wind data. A change from low- to high-resolution forcing results in an increase in NI kinetic energy by a factor three and raises the wind-generated power input to NI motions from 0.3 TW to 1.1 TW. Time and space filtering of the wind fields yield less kinetic energy, with a larger drop from time filtering. This strong sensitivity to wind forcing points to a possible underestimation of the wind-generated energy available for deep ocean mixing in previous studies based on low-resolution winds.