@article{fdi:010081503,
  title = {{I}ntra-annual rossby waves destabilization as a potential driver of low-latitude zonal jets : barotropic dynamics},
  author = {{D}elpech, {A}. and {M}enesguen, {C}. and {M}orel, {Y}. and {T}homas, {L}. {N}. and {M}arin, {F}r{\'e}d{\'e}ric and {C}ravatte, {S}ophie and {L}e {G}entil, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}t low latitudes in the ocean, the deep currents are shaped into narrow jets flowing eastward and westward, reversing periodically with latitude between 15 degrees {S} and 15 degrees {N}. {T}hese jets are present from the thermocline to the bottom. {T}he energy sources and the physical mechanisms responsible for their formation are still debated and poorly understood. {T}his study explores the role of the destabilization of intra-annual equatorial waves in the jets' formation process, as these waves are known to be an important energy source at low latitudes. {T}he study focuses particularly on the role of barotropic {R}ossby waves as a first step toward understanding the relevant physical mechanisms. {I}t is shown from a set of idealized numerical simulations and analytical solutions that nonlinear triad interactions ({NLTI}s) play a crucial role in the transfer of energy toward jet-like structures (long waves with short meridional wavelengths) that induce a zonal residual mean circulation. {T}he sensitivity of the instability emergence and the scale selection of the jet-like secondary wave to the forced primary wave are analyzed. {F}or realistic amplitudes around 5-20 cm s(-1), the primary waves that produce the most realistic jet-like structures are zonally propagating intra-annual waves with periods between 60 and 130 days and wavelengths between 200 and 300 km. {T}he {NLTI} mechanism is a first step toward the generation of a permanent jet-structured circulation and is discussed in the context of turbulent cascade theories.},
  keywords = {{O}cean circulation ; {J}ets ; {R}ossby waves ; {N}onlinear dynamics},
  booktitle = {},
  journal = {{J}ournal of {P}hysical {O}ceanography},
  volume = {51},
  numero = {2},
  pages = {365--384},
  ISSN = {0022-3670},
  year = {2021},
  DOI = {10.1175/jpo-d-20-0180.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081503},
}