@article{fdi:010049374,
  title = {{O}verview of synoptic conditions over {W}est {A}frica and {N}orth {A}tlantic before cyclogenesis},
  author = {{D}iedhiou, {A}rona and {C}amara, {M}. and {G}aye, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he objective of this study is to describe the large scale conditions over {W}est {A}frica and the {A}tlantic {O}cean before the occurrence of a cyclogenesis over the {N}orth {A}tlantic by comparing synoptic conditions of a 3 day average before the genesis days of all cyclones (269 cyclones given by the {N}ational {H}urricane {C}enter; {NHC}) with the mean {A}ug-{O}ct climatology from 1980 to 2004. {O}ver {W}est {A}frica, the mean synoptic pattern before cyclogenesis is characterized by the presence of a stronger monsoon layer and lower values of {O}utgoing {L}ongwave {R}adiation than the climatology depicting the presence of deeper convection. {M}oreover, the potential of genesis is stronger before cyclogenesis over the {W}est {A}frican coast than the climatology showing that strong low-level cyclonic vortices propagate from land to ocean in an atmosphere characterized by strong upper level support. {G}enerally, before the occurrence of a cyclonic activity, the atmosphere is more unstable and {A}frican {E}asterly {W}aves are more active over {W}est {A}frica than the climatology. {O}ver the {A}tlantic {O}cean, large scale conditions before cyclogenesis are characterized by the presence of high cyclogenesis contributors such as warmer waters, lower pressure, stronger mid-level humidity and higher degree of atmospheric instability.},
  keywords = {{A}frican easterly waves ; cyclogenesis ; {A}frican monsoon},
  booktitle = {},
  journal = {{S}cientific {R}esearch and {E}ssays},
  volume = {5},
  numero = {1},
  pages = {110--118},
  ISSN = {1992-2248},
  year = {2010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049374},
}