@article{fdi:010082212,
  title = {{I}dentification of a representative stationary period for rainfall variability description in the {S}udano-{S}ahelian zone of {W}est {A}frica during the 1901-2018 period},
  author = {{I}brahim, {B}. and {N}azoumou, {Y}. and {F}owe, {T}. and {S}idibe, {M}. and {B}arry, {B}. and {M}ah{\'e}, {G}il and {P}aturel, {J}ean-{E}mmanuel},
  editor = {},
  language = {{ENG}},
  abstract = {{M}any studies have been undertaken on climate variability in {W}est {A}frica since the drastic drought of 1970s. {T}hese studies rely in many cases on different baseline periods chosen with regard to the reference periods defined by the {W}orld {M}eteorological {O}rganization. {A} method is developed in this study to determine a stationary baseline period for rainfall variability analysis. {T}he method is based on an application of three statistic tests (on deviation and trend) and a test of shifts detection in rainfall time series. {T}he application of this method on six different gridded rainfall data and observations from 1901 to 2018 shows that the 1917-1946 period is the longest stationary period. {A}n assessment of the significance of the difference between the mean annual rainfall amount during this baseline period and the annual rainfall amount during the other years shows that the "{N}ormal" annual rainfall amount is defined by an interval delineated by +/- the standard deviation ({STD}). {W}ith regard to this interval, a very wet/dry year is defined with a surplus/gap over/below the {STD}. {O}verall the 1901-2018 period, the 1950-1970 period presents the most important number of significant wet years and the 1971-1990 period presents the most important number of significant dry years.},
  keywords = {climate variability ; climate change ; drought ; reference period ; {S}udano-{S}ahel ; {W}est {A}frica ; {AFRIQUE} {DE} {L}'{OUEST} ; {ZONE} {SOUDANOSAHELIENNE}},
  booktitle = {},
  journal = {{A}tmosphere},
  volume = {12},
  numero = {6},
  pages = {716 [16 ]},
  year = {2021},
  DOI = {10.3390/atmos12060716},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082212},
}