Climate change stressors in the Sahel
The Sahel is prone to climate stressors such as droughts, winds and floods. This study employs a systematic review approach to track the frequency with which these stressors are reported in the scientific peer reviewed literature, examining publishing trends to identify which stressors are most reported, documenting the spatial distribution of these stressors from a country and regional perspective, and assessing the role played by climatic and non-climatic drivers in causing the stressors. A total of (n = 388) reports of stressors were documented in (n = 164) peer reviewed articles. From a country perspective, Southern Niger records the highest number of reports on all three stressors (15.97%), followed by Ethiopia (11.85%) and Senegal (10.56%). Regionally, West African Sahel recorded the highest number of reports on all stressors (49.97%) followed by East African Sahel (29.89%) and Central African Sahel (12.11%) respectively. Droughts are observed to be the most frequently reported stressor (n = 219), followed by floods (n = 123) and winds (n = 46). The decade 1975–1985 recorded the highest reports of stressors (n = 207), while the decade 1997–2007 recorded (n = 80) and the decade 1986–1996 recorded (n = 52). While climatic drivers are dominant (52%), there is however an increasing attribution of the drivers of the stressors to non-climatic drivers (47%). The main weakness of this study is that it uses peer reviewed papers dwelling on climate stressors as a proxy for climate stressors in the Sahel and a lot more studies could be hiding in non-peer reviewed studies, underscoring that this work provides a general and baseline overview of the climate stressors in the region.
KeywordsStressors Droughts Floods Winds Climatic Non-climatic Regional Country-level Sahel
This work was supported by a grant from the Social Science and Humanities Research Council of Canada Grant Number 756-2016-0003.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- African Climate Change Fund. (2016). Supporting African countries to access international climate finance: Enabling a transition towards climate resilient, low-carbon development. The African Development Bank. https://www.afdb.org/fileadmin/uploads/afdb/Documents/Project-and-Operations/Africa_Climate_Change_Fund_-_Supporting_Africa_countries_to_access_international_climate_finance.pdf.
- Albergel, J. (1987). Sécheresse, désertification et ressources en eau de surface-Application aux petits bassins du Burkina Faso. In The influence of climate change and climatic variability on the hydrologic regime and water resources (Proceedings of the vancouver symposium, August 1987). IAHS Publ. no. 168. http://iahs.info/redbooks/A168/iahs_168_0355.pdf.
- Austin, S. E., Ford, J. D., Berrang-Ford, L., Araos, M., Parker, S., & Fleury, M. D. (2015). Public health adaptation to climate change in Canadian jurisdictions. International Journal of Environmental Research and Public Health, 12(691), 623–651. https://doi.org/10.3390/ijerph120100623.CrossRefGoogle Scholar
- Boyd, E., Cornforth, R. L., Lamb, P. J., Tarhule, A., Lele, M. A., & Brouder, A. (2013). Building resilience to face recurring environmental crisis in African Sahel. Nature Climate Change, 3, 631–637.Google Scholar
- Derrick, J. (1977). The great west African drought, 1972–1974. African Affairs, 6(305), 539–586.Google Scholar
- Huho, J. M., Ngaira, J. K. W., & Ogindo, H. (2011). Living with drought: The case of the Maasai pastoralists of northern Kenya. Educational Research, 2(1), 779–789.Google Scholar
- IPCC. (2007). Climate change 2007: Impacts, adaptations and vulnerability. In Contributions of the working group 2 to the fourth assessment report of the IPCC (p. 976). Cambridge: Cambridge University Press.Google Scholar
- IPCC. (2013). Climate change 2013: The physical science basis. In Contributions of the working group 1 to the fifth assessment report of the IPCC (p. 979). Cambridge: Cambridge University Press.Google Scholar
- IRIN. (2017). Backgrounder on the Sahel, West Africa’s poorest region. http://www.irinnews.org/feature/2008/06/02.
- Karam, D. B., Flamant, C., Knippertz, P., Reitebuch, O., Pelon, J., Chong, M., et al. (2008). Dust emissions over the Sahel associated with West African monsoon intertropical discontinuity region: A representative case study. Quarterly Journal of the Royal Meteorological Society, 134, 621–634.CrossRefGoogle Scholar
- Lesnikowski, A. C., Ford, J. D., Berrang-Ford, L., Barrera, M., Berry, P., Henderson, J., et al. (2013). National-level factors affecting planned, public adaptation to health impacts of climate change. Global Environmental Change, 23, 1153–1163. https://doi.org/10.1016/j.gloenvcha.2013.04.008.CrossRefGoogle Scholar
- Mahé, G., Lienou, G., Bamba, F., Paturel, J. E., Adeaga, O., Descroix, L., et al. (2011). Niger River and climate change over 100 years. In S. W. Franks, E. Boegh, E. Blyth, D. M. Hannah (Eds.), Hydro-climatology: Variability and change. Wallingford: IAHS Press.Google Scholar
- Nicholson, S. E. (1981). Rainfall and atmospheric circulation during drought periods and wetter years in West Africa. American Meteorological Society, 109, 2191–2208.Google Scholar
- Nicholson, S. E. (1995). Sahel, West Africa. Encyclopedia of Environmental Biology, 3, 261–275.Google Scholar
- Noble, I., & Huq, S. (2014). Adaptation needs and options. New York: Cambridge University Press. (chapter 14).Google Scholar
- Ozga-Zielinska, M. (1989). Droughts and floods-their definition and modeling. In Proceedings of the Baltimore symposium (Vol. 181). http://hydrologie.org/redbooks/a181/iahs_181_0313.pdf.
- Sivakumar, M. V. K., & Wallace J. S. (1991). Soil water balance in the Sudano-Sahelian zone: Need, relevance and objectives of the workshop. In M. V. K. Sivakumar, J. S. Wallace, C. Renard, & C. Giroux (Eds.), Soil water balance in the Sudano-Sahelian zone (pp. 3–10). IAHS Publication 199, Wallingford.Google Scholar
- Tall, R., Mason, S. J., Van Aalst, M., Suarez, P., Ait-Chellouche, Y., Diallo, A. A., et al. (2012). Using seasonal climate forecast to guide disaster management: The Red Cross experience during the 2008 West African floods. International Journal of Geophysics. https://doi.org/10.1155/2012/986016.Google Scholar
- United Nations (UN). (2015). Paris agreement. United Nations, New York. http://unfccc.int/files/essential_background/convention/application/pdf/english_paris_agreement.pdf.
- UNREDD+. (2015). Executive summary: 2015 annual report of the UN-REDD Programme Fund. http://www.unredd.net/documents.html?view=browse&customtags=172&startdate=&enddate=&dmlang=.
- Vanmaercke, M., Zenebe, A., Poesen, J., Nyssen, J., Verstaeten, G., & Deckers, J. (2010). Sediments dynamics and the role of flash floods in sediment export from medium-sized catchments: A case study from the semi-arid tropical highlands in northern Ethiopia. Journal of Soil Sediments, 10, 611–627.CrossRefGoogle Scholar