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Journal Article

The Iwex Spectrum

MPS-Authors

Müller,  Peter
Institut für Geophysik, Universität Hamburg;
MPI for Meteorology, Max Planck Society;

Olbers,  Dirk J.
Institut für Geophysik, Universität Hamburg;
MPI for Meteorology, Max Planck Society;

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JC083iC01p00479.pdf
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Citation

Müller, P., Olbers, D. J., & Willebrand, J. (1978). The Iwex Spectrum. Journal of Geophysical Research: Oceans, 83, 479-500. doi:10.1029/JC083iC01p00479.


Cite as: https://hdl.handle.net/21.11116/0000-0006-0565-3
Abstract
We describe the analysis of current and temperature cross spectra from the trimoored internal wave
experiment lwex and present a spectral model for the fluctuations in the internal wave range. The model consists of internal waves contaminated by temperature and current fine structure and by current noise.
Except for the inertial and tidal frequencies the distribution of wave energy is vertically symmetric and horizontally isotropic. The wavi: number spectrum is characterized by a bandwidth of about 20-10 equivalent modes (decreasing with frequency), by a power law at high wave numbers, and by a sharp peak
at low wave numbers. The general features of this spectrum agree fairly well with the one proposed by Garrett and Munk (1975). The contaminations increase with frequency. Contamination by temperature fine structure is confirmed by independent measurements. The lwex spectral model provides a consistent description of all observed cross spectra.