Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016

René Tato Loua 1, 2, 3 Hassan Bencherif 1, 4 Nkanyiso Mbatha 5 Nelson Bègue 1 Alain Hauchecorne 6 Zoumana Bamba 2 Venkataraman Sivakumar 1, 4
1 LACy - Laboratoire de l'Atmosphère et des Cyclones
2 CERESCOR - Centre de Recherche Scientifique de Conakry Rogbané
3 Direction Nationale de la Météorologie de Guinée
4 School of Chemistry and Physics [Durban]
5 Departement of Geography [UniZulu]
6 STRATO - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : The monthly averaged data time series of temperatures and rainfall without interruption of Conakry Airport (9.34 • N 13.37 • W, Guinea) from 1960 to 2016 were used. Inter-annual and annual changes in temperature and rainfall were investigated. Then, different models: Mann-Kendall Test, Multi-Linear-Regression analysis, Theil-Sen's slope estimates and wavelet analysis where used for trend analysis and the dependency with these climate forcings. Results showed an increase in temperature with semi-annual and annual cycles. A sharp and abrupt rise in the temperature in 1998 was found. The results of study have shown increasing trends for temperature (about 0.21 • /year). A decrease in rainfall (about −8.14 mm/year) is found since the end of 1960s and annual cycle with a maximum value of about 1118.3 mm recorded in August in average. The coherence between the two parameters and climate indices: El Niño 3.4, Atlantic Meridional Mode, Tropical Northern Atlantic and Atlantic Niño, were investigated. Thus, there is a clear need for increased and integrated research efforts in climate parameters variations to improve knowledge in climate change.
Keywords : temperature rainfall climate indices wavelet trend analysis climate change and Conakry
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René Tato Loua, Hassan Bencherif, Nkanyiso Mbatha, Nelson Bègue, Alain Hauchecorne, et al.. Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016. Climate , MDPI, 2019, 7 (7), art. 93 (26 p.). ⟨10.3390/cli7070093⟩. ⟨insu-02196177⟩

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