Audrey Brouillet

Institute of Research for Development | IRD · 228 - Space for Development (ESPACE-DEV)

A large range of climate change impacts is expected during the twenty-first century in vulnerable regions such as West Africa, where local populations largely rely on Livestock systems as their main food production and income source. As climate change threatens livestock systems in various ways, here we assess how regional livestock could be expose...

Main findings • The flooding occurred as a consequence of above average rainfall throughout the 2022 rainy season exacerbated by shorter spikes of very heavy rain leading to flash floods as well as riverine floods. We therefore consider seasonal average rainfall over Lake Chad and 7-day maximum rainfall along the lower Niger Basin as the basis for...

Main findings: A large part of the population of Central Sahel strongly depends on the annual rains and is thus chronically vulnerable to deviations from a normal season (e.g., delay in the onset of the rainy season, dry period within the rainy season, early end, etc); Rainfall during the wet season (June to September) in Central Sahel is highly va...

In this paper we are interested in identifying insightful changes in climate observations series, through outlier detection techniques. Discords are outliers that cover a certain length instead of being a single point in the time series. The choice of the length can be critical, leading to works on computing variable length discords. This increases...

The definition and extraction of actionable anomalous discords, i.e. pattern outliers, is a challenging problem in data analysis. It raises the crucial issue of identifying criteria that would render a discord more insightful than another one. In this paper, we propose an approach to address this by introducing the concept of prominent discord. The...

Global warming is projected to intensify during the twenty-first century. Yet, only few studies investigate how global warming could be perceived by future populations. Here, we propose an assessment of how climate change could be perceived by combining climatological indicators. We analyse extremes of temperature (T99) and simplified Wet-Bulb Glob...

D’après les modèles de climat, le réchauffement global observé va s’intensifier au cours du 21ème siècle, en lien avec l’augmentation des concentrations en gaz à effet de serre. Ce réchauffement pourra être plus ressenti par les populations s’il se produit rapidement et s’il affecte le corps humain en provoquant un stress thermique. Dans cette thès...

Heat stress is expected to intensify, since temperatures are projected to increase during the 21st century. We investigate the assumed co‐occurrence of annual extremes of temperature and one heat stress metric and assess the effect of relative humidity variations on the heat stress changes. We show in CMIP5 simulations that both extremes tend to co...