@article{fdi:010076528,
  title = {{H}eat wave occurrences over {S}enegal during spring : regionalization and synoptic patterns},
  author = {{S}ambou, {M}. {J}. {G}. and {J}anicot, {S}erge and {P}ohl, {B}. and {B}adiane, {D}. and {D}ieng, {A}. {L}. and {G}aye, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ased on 12 {S}enegalese stations of the {G}lobal {S}ummary of the {D}ay ({GSOD}) database (1979-2014), heat waves ({HW}) are defined for each station in spring ({M}arch-{A}pril-{M}ay, the hottest season in {S}enegal) as the daily maximum temperature ({T}x), minimum temperature ({T}n), or average apparent temperature of the day ({AT}), exceeding the corresponding 95% mobile percentile for at least three consecutive days. {A} hierarchical cluster analysis used to regionalize {HW} in these 12 stations is applied to simultaneous occurrences of daily temperature peaks over their 95% mobile percentiles. {T}hree homogeneous zones of four stations each are identified ({Z}one 1, {Z}one 2 and {Z}one 3), from west ({A}tlantic coastline) to east (inland {S}enegal). {A}tmospheric circulation associated with {HW} is assessed through composites of {ERA}-{I}nterim deseasonalized anomalies, with the start date of each {HW} in each zone used as a reference. {T}he main pattern controlling the presence of {HW} in {S}enegal consists in positive pressure anomalies centred around the strait of {G}ibraltar, promoting easterly to northeasterly wind anomalies. {T}his causes higher temperatures in the three zones of {S}enegal, and lower temperatures and drier air over the central {S}ahel. {T}his pattern is opposite to that characteristic of {HW} in the central {S}ahel shown in previous studies. {F}rom {Z}one 1 to {Z}one 3, the temperature and moisture patterns are shifted to the east while pressure anomalies weaken drastically. {N}ight-time {T}n-{HW} are characterized by higher water vapour contents than daytime {T}x-{HW}, corroborating and complementing previous studies over the {S}ahel. {T}hese {HW} patterns are close to the canonical mode of intra-seasonal atmospheric variability over {S}enegal.},
  keywords = {atmospheric circulation ; heat wave ; regionalization ; {S}enegal ; temperature ; {SENEGAL}},
  booktitle = {},
  journal = {{I}nternational {J}ournal of {C}limatology},
  volume = {40},
  numero = {1},
  pages = {440--457},
  ISSN = {0899-8418},
  year = {2020},
  DOI = {10.1002/joc.6220},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076528},
}