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1. oxfordre.com › climatescience › climatescienceClimate of the Sahel and West Africa | Oxford Research ...

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   This article provides an in-depth look at all aspects of the climate of the Sahel, including the pervasive dust in the Sahelian atmosphere. Emphasis is on two aspects: West African monsoon and the region’s rainfall regime. This includes an overview of the prevailing atmospheric circulation at the surface and aloft and the relationship between ...

2. www.nature.com › articles › s41467/017/02021-1Observed positive vegetation-rainfall feedbacks in the Sahel ...

   www.nature.com › articles › s41467/017/02021-1

   Nov 30, 2017 · Terrestrial versus oceanic contributions to Sahel climate. According to GEFA, oceanic forcings largely overwhelm terrestrial forcings on the observed variability in the Sahel’s regional ...

   • Author: Yan Yu, Michael Notaro, Fuyao Wang, Jiafu Mao, Xiaoying Shi, Yaxing Wei

   • Publish Year: 2017

3. People also ask

   How much do Oceanic and terrestrial drivers influence Sahel precipitation and air temperature?

   • Similar to the prior observational study based on a statistical vegetation index 23, the combined oceanic and terrestrial drivers considered here through GEFA explain only 20–52% and 35–75%, by month, of the total variance in observed Sahel precipitation and air temperature, respectively.

   Observed positive vegetation-rainfall feedbacks in the Sahel ... - Nature

   www.nature.com/articles/s41467-017-02021-1

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   Is the Sahel a wet region?

   • On average, the Sahel lies within this region of subsidence. In very wet years the two cells merge, creating a very broad band of rainfall (Nicholson, 2008 ). Figure 23. Schematic of the rain belt over West Africa (from Nicholson, 2009 ). The top diagram is a vertical cross-section of mean vertical motion (10 −2 hPa s −1) in August.

   Climate of the Sahel and West Africa - Oxford Research Encyclopedias

   oxfordre.com/climatescience/climatescience/display/10.1093/acrefore/9780190228620.001.0001/acrefore-9780190228620-e-510

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   What is Sahel climate like?

   • Its direction is northeasterly when embedded within the Harmattan but southwesterly when embedded within the monsoon flow. An outstanding characteristic of Sahel climate is a deep layer of mineral dust produced by wind erosion of the dry and barren land surface. It persists much of the year, generally from late spring to early fall.

   Climate of the Sahel and West Africa - Oxford Research Encyclopedias

   oxfordre.com/climatescience/climatescience/display/10.1093/acrefore/9780190228620.001.0001/acrefore-9780190228620-e-510

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   What is a Sahel region?

   • The term “Sahel” is often applied to the general region extending some 5,000 km across the east-west extent of Africa and from the desert to the humid savanna woodland at roughly 10 o N. “Sahel” more properly applies to a smaller region between the latitudes of roughly 14 o N and 18 o N (Figure 1 ).

   Climate of the Sahel and West Africa - Oxford Research Encyclopedias

   oxfordre.com/climatescience/climatescience/display/10.1093/acrefore/9780190228620.001.0001/acrefore-9780190228620-e-510

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4. biologynotesweb.com › 9-abiotic-factors-of-the9 Abiotic Factors of the Sahara Desert and Their Ecological ...

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   Jan 17, 2024 · Importance of studying abiotic factors in the Sahara Desert. Examining the abiotic or non-living components of the Sahara Desert environment is important for understanding this extreme ecosystem. Abiotic factors shape the desert’s biodiversity patterns, species adaptations, ecosystem processes, and human livelihoods.

5. link.springer.com › article › 10Regime Shifts in the Sahara and Sahel: Interactions between ...

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   Sep 9, 2003 · The Sahara and Sahel regions of northern Africa have complex environmental histories punctuated by sudden and dramatic “regime shifts” in climate and ecological conditions. Here we review the current understanding of the causes and consequences of two environmental regime shifts in the Sahara and Sahel. The first regime shift is the sudden transition from vegetated to desert conditions in ...

   • Author: Jonathan A. Foley, Michael T. Coe, Marten Scheffer, Guiling Wang

   • Publish Year: 2003

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7. link.springer.com › article › 10The causes, effects and challenges of Sahelian droughts: a ...

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   May 18, 2013 · This paper is a critical synthesis of the causes, effects and challenges of the Sahelian droughts. The results show that the four main causes of the Sahelian droughts are as follows: sea surface temperature changes, vegetation and land degradation, dust feedbacks and human-induced climate change. However, human-induced climate change is seen as the major drought-determining factor because it ...

8. www.sciencedirect.com › science › articleDesertification in the Sahel: Towards better accounting for ...

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   Nov 1, 2011 · The implications of the upward trend in rainfall in the Sahel since 1980 for the interpretation of remote sensing images are illustrated in Fig. 3. Fig. 3 shows how ecosystem degradation can potentially be masked by the rainfall variation that has occurred in the Sahel in the period 1981–2000. The figure shows two potential models for the ...

   • Author: L.G. Hein, N. de Ridder, P. Hiernaux, R. Leemans, A.J.W. de Wit, M.E. Schaepman

   • Publish Year: 2011

9. www.khanacademy.org › a › major-abiotic-factorsMajor abiotic factors (article) | Khan Academy

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   abiotic factors. non-living, physical or chemical components that influence an organism's habitat. eurythermal organism. organism that can tolerate a wide range of temperatures. stenothermal organism. organism that can only tolerate a narrow range of temperatures. euryhaline organism. organism that can tolerate a wide range of salinity.