@article{fdi:010072434,
  title = {{T}rend in the co-occurrence of extreme daily rainfall in {W}est {A}frica {S}ince 1950},
  author = {{B}lanchet, {J}. and {A}ly, {C}laire and {V}ischel, {T}. and {P}anthou, {G}. and {S}ane, {Y}. and {K}ane, {M}. {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e propose in this paper a statistical framework to study the evolution of the co-occurrence of extreme daily rainfall in {W}est {A}frica since 1950. {W}e consider two regions subject to contrasted rainfall regimes: {S}enegal and the central {S}ahel. {W}e study the likelihood of the 3% largest daily rainfall (considering all days) in each region to occur simultaneously and, in a 20year moving window approach, how this likelihood has evolved with time. {O}ur method uses an anisotropic max-stable process allowing us to properly represent the co-occurrence of daily extremes and including the possibility of a preferred direction of co-occurrence. {I}n {S}enegal, a change is found in the 1980s, with preferred co-occurrence along the {E}-50-{N} direction (i.e., along azimuth 50 degrees) before the 1980s and weaker isotropic co-occurrence afterward. {I}n central {S}ahel, a change is also found in the 1980s but surprisingly with contrasting results. {A}nisotropy along the {E}-{W} direction is found over the whole period, with greater extension after the 1980s. {T}he paper discusses how the co-occurrence of extremes can provide a qualitative indicator on change in size and propagation of the strongest storms. {T}his calls for further research to identify the atmospheric processes responsible for such contrasted changes in storm properties. {P}lain {L}anguage {S}ummary {W}e propose in this paper a statistical framework to study the evolution of the co-occurrence of extreme daily rainfall in {W}est {A}frica since 1950. {W}e consider two regions subject to contrasted rainfall regimes: {S}enegal and the central {S}ahel. {I}n {S}enegal, a change is found in the 1980s, with preferred co-occurrence along the {E}-50-{N} direction (i.e., along azimuth 50 degrees) before the 1980s and weaker isotropic co-occurrence afterward. {I}n the central {S}ahel, a change is also found in the 1980s but surprisingly with contrasting results. {A}nisotropy along the {E}-{W} direction is found over the whole period, with greater extension after the 1980s. {T}he paper discusses how the co-occurrence of extremes can provide a qualitative indicator on change in size and propagation of the strongest storms. {T}his calls for further research to identify the atmospheric processes responsible for such contrasted changes in storm properties.},
  keywords = {extreme rainfall ; {W}est {A}frica ; co-occurrence ; trend ; {AFRIQUE} {DE} {L}'{OUEST} ; {SENEGAL} ; {SAHEL}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {A}tmospheres},
  volume = {123},
  numero = {3},
  pages = {1536--1551},
  ISSN = {2169-897{X}},
  year = {2018},
  DOI = {10.1002/2017jd027219},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072434},
}