Work Description

Title: Rotary spectra of surface kinetic energy in drifters and high-resolution global ocean models Open Access Deposited

http://creativecommons.org/licenses/by/4.0/
Attribute Value
Methodology
  • The data are rotary spectra computed from the HYCOM and MITgcm (LLC4320) simulations subsampled to 1/4 degree. FOr each model, time series are generated based on the zonal (u) and meridional velocities (u) for a full year. These time series are split into 11 segments of 60 days each overlapping by 50%. 1D discrete Fourier transform of u + iv is computed. The Fourier coefficients are mutliplied by their complex conjugates and averaged over spegments to produce spectra. These spectra are integrated over defined frequency bands to produce kinetic energy values.
Description
  • For Drifters, HYCOM, MITgcm: Spectra and kinetic energy files. Please see readme.txt for a description of all data and code contained here.

  • - Compare kinetic energies (KE) of high-resolution global ocean models estimated from rotary spectra to KE in surface drifter observations. - Near-inertial KE is closer to drifter observations in models with frequently updated wind forcing - Internal tide KE is closer to drifter observations in models with topographic wave drag
Creator
Depositor
  • jbrasch@umich.edu
Contact information
Discipline
Funding agency
  • National Aeronautics and Space Administration (NASA)
  • National Science Foundation (NSF)
  • Department of Defense (DOD)
ORSP grant number
  • This research was supported by funding from US National Science Foundation (NSF) grant OCE-1851164 as well as a Research Experience for Undergraduates Supplement to that grant. BKA also gratefully acknowledges funding from Office of Naval Research (ONR) grant N00014-18-1-2544 and NASA grants NNX16AH79G, NNX17AH55G, and 80NSSC20K1135.
Keyword
Date coverage
  • 2020-05-01 to 2020-08-31
Citations to related material
  • Elipot, S., R. Lumpkin, R. C. Perez, J. M. Lilly, J. J. Early, and A. M. Sykulski (2016), "A global surface drifter dataset at hourly resolution", J. Geophys. Res. Oceans, 121, doi:10.1002/2016JC011716.
Resource type
Last modified
  • 09/01/2020
Published
  • 09/01/2020
Language
DOI
  • https://doi.org/10.7302/r8q1-g224
License
To Cite this Work:
Brasch, J., Elipot, S., Arbic, B. (2020). Rotary spectra of surface kinetic energy in drifters and high-resolution global ocean models [Data set]. University of Michigan - Deep Blue. https://doi.org/10.7302/r8q1-g224

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