Ocean Striations
نویسندگان
چکیده
Accumulation of large, high-quality satellite and in situ data led to significant improvements in the description of the mean dynamic ocean topography (MDOT) [6]. The new models of MDOT, with the resolution improved to 50-100 km, have not only revealed important details in the complex mesoscale structure of circulation systems such as the Gulf Stream, Kuroshio Extension, and Antarctic Circumpolar Current, but also led to the discovery of new anisotropic jet-like features in ocean circulation referred to as “striations” [3,4,5].
منابع مشابه
Stationary mesoscale jet-like features in the ocean
[1] XBT and float data of the World Ocean Database 2005 are used to validate new stationary jet-like features (striations) recently found in the high-resolution mean dynamic ocean topography (MDOT). Two study areas were selected in the eastern parts of the North and South Pacific subtropical gyres free of any strong currents. Appropriate horizontal high-pass filtering applied to the ensemble-me...
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Low-frequency oceanicmotions have banded structures termed ‘‘striations.’’ Since these striations embedded in large-scale gyre flows can have large amplitudes, the authors investigated the effect of mean flow on their directions as well as their contribution to energetics and mixing using a b-plane, barotropic, quasigeostrophic ocean model. In spite of the model simplicity, striations are alway...
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Much of the recent research in ocean acoustics has focused on developing methods to exploit the effects that the sea surface and seafloor have on acoustic propagation. Many of those methods require detailed knowledge of the acoustic properties of the seafloor and the sound speed profile (SSP), which limits their applicability. The range-frequency waveguide invariant describes striations that of...
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[1] A simple barotropic quasi-geostrophic model is used to demonstrate that instabilities radiated from an unstable eastern boundary current can generate zonal striations in the ocean interior with realistic wavelengths and amplitudes. Nonlinear transfer of energy from the more unstable trapped modes is important for radiating modes to overcome friction. The dynamics shown here are generic enou...
متن کاملQuantifying and Interpreting Striations in a Subtropical Gyre: A Spectral Perspective Citation
The amplitude, origin, and direction of striations in the subtropical gyre are investigated using simulated and analytical multidimensional spectra. Striations, defined as banded structures in the low-frequency motions, account for a noticeable percentage of zonal velocity variability in the east North Pacific (ENP: 258– 428N, 1508–1308W) and central North Pacific (CNP: 108–228N, 1328E–1628W) r...
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