African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1126

Full Length Research Paper

An evaluation of the performance of imputation methods for missing meteorological data in Burkina Faso and Senegal

Semou Diouf
  • Semou Diouf
  • LEITER, Applied Science and Technology Training and Research Unit, Gaston Berger University, BP 234, Saint-Louis 32000, Senegal.
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Abdoulaye Deme
  • Abdoulaye Deme
  • LEITER, Applied Science and Technology Training and Research Unit, Gaston Berger University, BP 234, Saint-Louis 32000, Senegal.
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El Hadji Deme
  • El Hadji Deme
  • LERSTAD, Applied Science and Technology Training and Research Unit, Gaston Berger University, BP 234, Saint-Louis 32000, Senegal.
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Papa Fall
  • Papa Fall
  • LEITER, Applied Science and Technology Training and Research Unit, Gaston Berger University, BP 234, Saint-Louis 32000, Senegal.
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Ibrahima Diouf
  • Ibrahima Diouf
  • LPAOSF, Polytechnic School, Cheikh Anta Diop University, BP 5085, Dakar 10700, Senegal.
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  •  Received: 14 August 2023
  •  Accepted: 24 October 2023
  •  Published: 31 October 2023

Abstract

Addressing data incompleteness issues is crucial for reliable climate studies, especially in regions like Africa that commonly experience data gaps. This study aims to evaluate the performance of five imputation methods (knn, ppca, mice, imputeTS, and missForest) on meteorological data from stations in Burkina Faso and Senegal. The imputed data is compared with ERA5 reanalysis data to validate its accuracy. Temperature, relative humidity, and precipitation observations from the GSOD dataset (1973-2020) were used, creating subsets with missing rates of 5, 10, 20, 30 and 40%. An evaluation was conducted using the Taylor diagram and Kling-Gupta Efficiency (KGE). The results show a good estimation of temperature and relative humidity time series, with missForest performing the best for handling missing values. Precipitation estimation was less accurate, but there was strong agreement between estimated and observed data. ImputeTS was recommended for precipitation. Spatial consistency between imputed data and ERA5 reanalysis products was found. This research improves the quality of meteorological data, provides essential information about climatic characteristics, and serves as a foundation for climate change and weather modeling studies.

 

Key words: Meteorological data, imputation methods, Senegal, Burkina Faso.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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