The intensification of thermal extremes in west Africa

J. Ringard, B. Dieppois, S. Rome, A. Diedhiou, T. Pellarin, A. Konaré, A. Diawara, D. Konaté, B. K. Dje, G. L. Katiellou, I. Seidou Sanda, B. Hassane, T. Vischel, G. F. Garuma, G. Mengistu, M. Camara, A. Diongue, A. T. Gaye, L. Descroix

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study aims in filling the gap in understanding the relationship between trend and extreme in diurnal and nocturnal temperatures (Tx and Tn) over the Gulf of Guinea area and the Sahel. Time-evolution and trend of Tx and Tn anomalies, extreme temperatures and heat waves are examined using regional and station-based indices over the 1900-2012 and 1950-2012 periods respectively. In investigating extreme temperature anomalies and heat waves, a percentile method is used. At the regional and local scales, rising trends in Tx and Tn anomalies, which appear more pronounced over the past 60. years, are identified over the two regions. The trends are characterized by an intensification of: i) nocturnal/Tn warming over the second half of the 20th century; and ii) diurnal/Tx warming over the post-1980s. This is the same scheme with extreme warm days and warm nights. Finally annual number of diurnal and nocturnal heat waves has increase over the Gulf of Guinea coastal regions over the second half of the 20th century, and even more substantially over the post-1980s period. Although this trend in extreme warm days and nights is always overestimated in the simulations, from the Coupled Model Intercomparison Project Phase 5 (CMIP5), those models display rising trends whatever the scenario, which are likely to be more and more pronounced over the two regions in the next 50. years.

Original languageEnglish
Pages (from-to)66-77
Number of pages12
JournalGlobal and Planetary Change
Volume139
DOIs
Publication statusPublished - Apr 1 2016

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warming
anomaly
temperature anomaly
West Africa
trend
temperature
simulation
heat wave
gulf
CMIP
index
method
station

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Global and Planetary Change

Cite this

Ringard, J., Dieppois, B., Rome, S., Diedhiou, A., Pellarin, T., Konaré, A., ... Descroix, L. (2016). The intensification of thermal extremes in west Africa. Global and Planetary Change, 139, 66-77. https://doi.org/10.1016/j.gloplacha.2015.12.009
Ringard, J. ; Dieppois, B. ; Rome, S. ; Diedhiou, A. ; Pellarin, T. ; Konaré, A. ; Diawara, A. ; Konaté, D. ; Dje, B. K. ; Katiellou, G. L. ; Seidou Sanda, I. ; Hassane, B. ; Vischel, T. ; Garuma, G. F. ; Mengistu, G. ; Camara, M. ; Diongue, A. ; Gaye, A. T. ; Descroix, L. / The intensification of thermal extremes in west Africa. In: Global and Planetary Change. 2016 ; Vol. 139. pp. 66-77.
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Ringard, J, Dieppois, B, Rome, S, Diedhiou, A, Pellarin, T, Konaré, A, Diawara, A, Konaté, D, Dje, BK, Katiellou, GL, Seidou Sanda, I, Hassane, B, Vischel, T, Garuma, GF, Mengistu, G, Camara, M, Diongue, A, Gaye, AT & Descroix, L 2016, 'The intensification of thermal extremes in west Africa', Global and Planetary Change, vol. 139, pp. 66-77. https://doi.org/10.1016/j.gloplacha.2015.12.009

The intensification of thermal extremes in west Africa. / Ringard, J.; Dieppois, B.; Rome, S.; Diedhiou, A.; Pellarin, T.; Konaré, A.; Diawara, A.; Konaté, D.; Dje, B. K.; Katiellou, G. L.; Seidou Sanda, I.; Hassane, B.; Vischel, T.; Garuma, G. F.; Mengistu, G.; Camara, M.; Diongue, A.; Gaye, A. T.; Descroix, L.

In: Global and Planetary Change, Vol. 139, 01.04.2016, p. 66-77.

Research output: Contribution to journalArticle

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AU - Ringard, J.

AU - Dieppois, B.

AU - Rome, S.

AU - Diedhiou, A.

AU - Pellarin, T.

AU - Konaré, A.

AU - Diawara, A.

AU - Konaté, D.

AU - Dje, B. K.

AU - Katiellou, G. L.

AU - Seidou Sanda, I.

AU - Hassane, B.

AU - Vischel, T.

AU - Garuma, G. F.

AU - Mengistu, G.

AU - Camara, M.

AU - Diongue, A.

AU - Gaye, A. T.

AU - Descroix, L.

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Ringard J, Dieppois B, Rome S, Diedhiou A, Pellarin T, Konaré A et al. The intensification of thermal extremes in west Africa. Global and Planetary Change. 2016 Apr 1;139:66-77. https://doi.org/10.1016/j.gloplacha.2015.12.009