@article{fdi:010092219,
  title = {{D}istinguishing north and south {A}frican {E}asterly {W}aves with a spectral method : {I}mplication for tropical cyclogenesis from mergers in the {N}orth {A}tlantic},
  author = {{J}onville, {T}. and {C}ornillault, {E}. and {L}avaysse, {C}hristophe and {P}eyrill{\'e}, {P}. and {F}lamant, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}frican {E}asterly {W}aves ({AEW}s) are mixed barotropic-baroclinic instabilities, propagating both north ({AEW}-{N}) and south ({AEW}-{S}) of the {A}frican {E}asterly {J}et. {T}hey are an important component of the {N}orth {A}tlantic region meteorology, influencing precipitation and convection, and are primary seeds for tropical cyclones ({TC}s) over the {N}orth {A}tlantic. {I}n this study, a novel tracking protocol is introduced based on filtering of the 700-h{P}a vorticity over two frequency ranges, suited for each wave track: 2.95-4.55 days (quicker propagating mode) and 4.55-6.35 days (slower propagating mode). {I}t is applied to a 31-year reanalysis dataset, the {E}uropean {C}entre for {M}edium-range {W}eather {F}orecasts ({ECMWF}) {F}ifth {R}eanalysis. {T}his method effectively isolates north-track activity even amidst dominant south-track signals, enabling better identification and tracking of northward vortices. {A}n analysis of the climatological structure of the two modes is conducted. {T}he slower mode propagates around 24},
  keywords = {{A}frican {E}asterly {W}aves ; hurricanes ; mergers ; tropical cyclones ; tropical ; storms ; wave pouch ; {AFRIQUE} {DE} {L}'{OUEST} ; {ATLANTIQUE} {NORD}},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[25 p.]},
  ISSN = {0035-9009},
  year = {2024},
  DOI = {10.1002/qj.4909},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092219},
}