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Rural societies in the face of climatic and environmental changes in West Africa

 | 
Benjamin Sultan
, 
Richard Lalou
, 
Mouftaou Amadou Sanni
, 
et al.

Part I. Recent and future climate change in West Africa. Obvious features, uncertainties and perceptions

Chapter 2. The return of a wet period in the Sahel?

Observations and prospects

Théo Vischel, Thierry Lebel, Gérémy Panthou, Guillaume Quantin, Aurélien Rossi and Maxime Martinet

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Excerpt

Introduction

The question of the evolution of precipitations is of prime importance in the Sahel, a region where rainfall is at the heart of societal concerns. A deficit affects the availability of water resources and the yields of farming that is still mainly rainfed. Excess water can cause extreme hydrologic events that are harmful for populations increasingly exposed to flood risks. Precipitations are in fact the signature of the atmospheric and environmental processes that regulate the West African monsoon, which is in turn a component of the global climate system. The evolution of precipitations is thus at the hinge-point between climate variability and its impact on populations. Describing it is essential for learning about water-related risks and anticipating their future in a changing global climate.

Following the strong involvement of the international scientific community, especially at the end of the 1970s, major progress has been made in the understanding of the mechanisms...

Author(s)

Hydro-climatologist, IRD, Université Grenoble Alpes, LTHE (Laboratoire d’étude des transferts en hydrologie et environnement), UMR 5564 IRD/CNRS/UJF/G-INP, Grenoble, France

Hydro-climatologist, IRD, université Grenoble Alpes, LTHE (Laboratoire d’étude des transferts en hydrologie et environnement), UMR 5564 IRD/CNRS/UJF/G-INP, Grenoble, France

Hydro-climatologist, IRD, Université Grenoble Alpes, LTHE (Laboratoire d’étude des transferts en hydrologie et environnement), UMR 5564 IRD/CNRS/UJF/G-INP, Grenoble, France

Hydro-climatologist, IRD, Université Grenoble Alpes, LTHE (Laboratoire d’étude des transferts en hydrologie et environnement), UMR 5564 IRD/CNRS/UJF/G-INP, Grenoble, France

© IRD Éditions, 2017

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