The aim of this study is to simulate the impact mineral dust emissions from Sahel–Saharan zone on temperature extremes over Sahel. To achieve goal, we performed two numerical simulations: one with standard version regional climate model RegCM4 (no run) and another same incorporating a module (dust run). difference between both versions allowed isolate impacts extremes. results show that accumul...

For 30 Afro-Palearctic bird species, the size of breeding population in Europe is compared to numbers wintering northern dry belt Africa south Sahara, Sahel. As distribution most these species wider than just and Sahel, estimates are adjusted based on known ranges. Eight Palearctic recorded sparsely Sahel appeared winter mainly beyond our delimited study area so were excluded from analyses. Spe...

OBJECTIVE To determine the prevalence and causes of visual loss in different ecological zones across Nigeria. METHODS A population-based survey using multi-stage, stratified, cluster random sampling with probability proportional to size comprising a nationally representative sample of adults aged > or = 40 years from six ecological zones. OUTCOME MEASURES Distance vision was measured using ...

Over many decades our understanding of the impacts of intermittent drought in water-limited environments like the West African Sahel has been influenced by a narrative of overgrazing and human-induced desertification. The desertification narrative has persisted in both scientific and popular conception, such that recent regional-scale recovery ("regreening") and local success stories (community...

Besides sea surface temperature (SST), soil moisture (SM) exhibits a significant memory and is likely to contribute to atmospheric predictability at the seasonal timescale. In this respect, West Africa was recently highlighted as a “hot spot” where the land-atmosphere coupling could play an important role, through the recycling of precipitation and the modulation of the meridional gradient of m...

Experiments with coupled atmosphere/biosphere models indicate that land degradation leads to a reduction in rainfall, evapotranspiration, soil moisture and runoff, and an increase in surface temperature and near surface winds. This talk discusses studies that have investigated the feedback of degradation in forest and other ecosystems on regional climate in the Sahel, the central U.S., South Am...

Abstract In the past decade, EU has significantly stepped up its profile as a security actor in Sahel. Drawing on historical institutionalism, we conceptualise path-dependencies and lock-in effects elements of “foreign policy entrapment” spiral to analyse EU’s policies towards Specifically, seek explain increasingly widened deepened engagement region. Hence, this article traces evolution Sahel ...

Two views about breastfeeding and the resumption of intercourse after a birth are found to prevail in Bamako and Bobo-Dioulasso, two cities of the Sahel region of Africa: that sexual relations may spoil the milk; and that a child should be weaned when the woman is pregnant again. Both beliefs provide a rationale to abstain, but the postpartum taboo has been greatly reduced in the area, and the...