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.
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Adefolalu, D. O. (1986). Further aspects of Sahelian drought as evident from rainfall regime of Nigeria. Archives for Meteorology, Geophysics, and Bioclimatology, 36, 277–295.
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.
Agnew, C. T., & Chappell, A. (1999). Drought in the Sahel. GeoJournal, 48, 299–311.
Agnew, C. T., & Warren, A. (1996). A framework for tackling drought and land degradation. Journal of Arid Environments, 33, 309–320.
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.
Alpert, P., & Ganor, E. (1993). A jet stream associated heavy dust storm in the western Mediterranean. Journal Geophysical Research, 98, 7339–7349.
Amogu, O., Descroix, L., Yero, K. S., Le Breton, E., Mamdou, I., Ali, A., et al. (2010). Increasing river flows in the Sahel? Water, 2, 170–199. https://doi.org/10.3390/w2020170.
Anuforom, A. (2007). Spatial distribution and temporal variability of Harmattan dust haze in sub-Sahel West Africa. Atmospheric Environment, 41, 9079–9090.
Anyamba, A., & Eastman, J. (1996). Inter-annual variability of NDVI over Africa and its relation to El Niño/Southern Oscillation. International Journal of Remote Sensing, 17, 2533–2548.
Anyamba, A., & Tucker, C. J. (2005). Analysis of Sahelian Vegetation dynamics using NOAA-AVHRR NDVI data from 1981–2003. Journal of Arid Environments, 63, 595–614.
Araos, M., Austin, S. E., Berrang-Ford, L., & Ford, J. (2015). Public health adaptation to climate change in large cities: A global baseline. International Journal of Health Services. https://doi.org/10.1177/0020731415621458.
Araos, M., Berrang-Ford, L., Ford, J., Austin, S., Biesbroek, R., & Lesnikowski, A. (2016). Climate change adaptation in large cities: A systematic global assessment. Environmental Science and Policy, 66, 375–382.
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.
Berrang-Ford, L., Ford, J. D., Lesnikowski, A., Poutianinen, C., Barrera, M., & Heymann, S. J. (2014). What drives national adaptation? A global assessment. Climate Change. https://doi.org/10.1007/s10584-014-1078-3.
Berrang-Ford, L., Pearce, T., & Ford, J. D. (2015). Systematic review approaches for global environmental change research. Regional Environmental Change, 15, 755–769.
Billi, P., Alemu, Y. T., & Ciampalini, R. (2015). Increased frequency of flash floods in Dire Dawa, Ethiopia: Change in rainfall intensity or human impact? Natural Hazards, 76, 1373–1394.
Birkett, C., Mutugudde, R., & Allan, T. (1999). Indian Ocean climate event brings floods to East Africa’s lakes and Sudd Marsh. Geophysical Research Letters, 26(8), 1031–1034.
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.
Deressa, T., Hassan, R., Ringler, C., Alemu, T., & Yesuf, M. (2009). Determinants of farmers’ choice of adaptation methods to climate change in the Nile Basin of Ethiopia. Global Environmental Change, 19, 248–255.
Derrick, J. (1977). The great west African drought, 1972–1974. African Affairs, 6(305), 539–586.
Dixon, R., Smith, J., & Guill, S. (2010). Life on the edge: Vulnerability and adaptation of African ecosystems to global climate change. Mitigation and Adaptation Strategies for Global Change, 8, 93–113.
Drees, L. R., Manu, A., & Wilding, L. P. (1993). Characteristics of Aeolian dust in the Niger, West Africa. Geoderma, 59, 213–233.
Eklundh, L., & Olsson, L. (2003). Vegetation index trends for the African Sahel 1982–1999. Geophysical Research Letters, 30(8), 1430. https://doi.org/10.1029/2002GL016772.
Epule, T. E., Ford, J. D., & Lwasa, S. (2017a). Projections of maize yield vulnerability to droughts and adaptation options in Uganda. Land Use Policy, 65, 154–163. https://doi.org/10.1016/landusepol.2017.04.013.
Epule, T. E., Ford, J. D., Lwasa, S., & Lepage, L. (2017b). Vulnerability of maize yields to droughts in Uganda. Water, 29, 181. https://doi.org/10.3390/w9030181.
Epule, T. E., Peng, C., & Lepage, L. (2015). Environmental refugees in sub-Saharan Africa: A review of perspectives on trends, causes, challenges and way forward. GeoJournal, 80, 79–92.
Epule, T. E., Peng, C., Lepage, L., & Chen, Z. (2014a). The causes, effects and challenges of Sahelian droughts: A critical review. Regional Environmental Change, 14, 145–156.
Epule, T. E., Peng, C., Lepage, L., & Chen, Z. (2014b). Policy options towards deforestation reduction in Cameroon: An analysis based on a systematic approach. Land Use Policy, 36, 405–415. https://doi.org/10.1016/j.landusepol.2013.09.004.
Faure, H., & Gac, J. Y. (1985). Will the Sahel drought end in 1985? Nature, 291, 475–478.
Fernandez, A., Najafi, M., Durand, M., Mark, B. G., Moritz, M., Jung, H. C., et al. (2016). Testing the skill of numerical hydraulic modeling to simulate spatiotemporal flooding patterns in the Logone floodplain, Cameroon. Journal of Hydrology, 539, 265–280.
Ford, J. D., Berrang-Ford, L., Bunce, A., McKay, C., Irwin, M., & Pearce, T. (2015). The status of climate change adaptation in Africa and Asia. Regional Environmental Change, 15, 801–814.
Ford, J. D., Berrang-Ford, L., & Patterson, J. (2011). A systematic review of observed climate change adaptation in developed nations. Climate Change Letters, 106, 327–336.
Ford, J. D., McDowell, G., & Jones, J. (2014). The state of climate change adaptation in the Arctic. Environmental Research Letters, 9, 104005. https://doi.org/10.1088/1748-9326/9/10/104005.
Ford, J. D., & Pearce, T. (2010). What we know, don’t know, and need to know about climate change vulnerability in the western Canadian Arctic. Environmental Research Letters. https://doi.org/10.1088/1748-7659326/5/1/014008.
Giannini, A., Biasutti, M., Held, I. M., & Sobel, A. H. (2008). A global perspective on African climate. Climatic Change, 90, 359–383. https://doi.org/10.1007/s10584-008-9396-y.
Giannini, A., Saravanan, R., & Chang, P. (2003). Oceanic forcing of Sahel Rainfall on interannual to interdecadal timescales. Science, 302, 1027–1030.
Giannini, A., Saravanan, R., & Chang, P. (2005). Dynamics of the boreal summer African monsoon in the NSIPP1 atmospheric model. Climate Dynamics, 25, 517–535. https://doi.org/10.1007/s00382-005-0056-x.
Hastenrath, S., Polzin, D., & Mutai, C. (2009). Diagnosing the droughts and floods in Equatorial East Africa during Boreal Autumn 2005–08. American Meteorological Society. https://doi.org/10.1175/2009jcli3094.1.
Hiernaux, P., Diarra, L., Trichon, V., Mougin, E., Soumaguel, N., & Baup, F. (2009). Woody plant population dynamics in response to climate change from 1984 to 2006 in Sahel (Gourma, Mali). Journal of Hydrology, 375, 103–113.
Hitchcock, R., & Hussein, H. (1987). Agricultural and non-agricultural settlements for drought-affected pastoralists in Somalia. Disasters, 11(1), 30–39.
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.
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.
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.
IRIN. (2017). Backgrounder on the Sahel, West Africa’s poorest region. http://www.irinnews.org/feature/2008/06/02.
Jankowiak, I., & Tanre, D. (1992). Satellite climatology of Saharan dust outbreaks: Method and preliminary results. Journal of Climate, 5, 646–656.
Kaly, F., Marticorena, B., Rajot, J. L., Janicot, S., Niang, A., Yahi, A., et al. (2015). Variability of mineral dust concentrations over West Africa monitored by the Sahelian Dust Transect. Atmospheric Research, 164(165), 226–241.
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.
Keller, E. (1992). Drought, war and the politics of famine in Ethiopia and Eritrea. The Journal of Modern African Studies, 30(4), 609–624.
Labbe, J., Ford, J. D., Araos, M., & Flynn, M. (2017). The government-led climate change adaptation landscape in Nunavut, Canada. Environmental Reviews, 25, 12–25. https://doi.org/10.1139/er-2016-0032.
Le Houerou, H. N. (1996). Climate change, drought and desertification. Journal of Arid Environments, 34, 133–185.
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.
Lopez-I-Gelats, F., Fraser, E. D. G., Morton, J. F., & Rivera-Ferre, M. G. (2016). What drives the vulnerability of pastoralist to global environmental change? A qualitative meta-analysis. Global Environmental Change, 39, 258–274.
Lu, J., & Delworth, T. L. (2005). Oceanic forcing of the late 20th century Sahel drought. Geophysical Research Letters, 32, L22706. https://doi.org/10.1029/2005GL023316.
Lwasa, S. (2015). A systematic review of research on climate change adaptation policy and practice in Africa and South Asia deltas. Regional Environmental Change, 15, 815–825. https://doi.org/10.1007/s10113-014-0715-8.
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.
Mamadou, I., Gautier, E., Descroix, L., Noma, I., Moussa, I. B., Maiga, O. F., et al. (2015). Exorheism growth as an explanation of increasing flooding in the Sahel. CATENA, 131, 130–139.
Maranz, S. (2009). Tree mortality in the African Sahel indicates an anthropogenic ecosystem displaced by climate change. Journal of Biogeography, 36, 1181–1193.
McLeman, R. (2011). Settlement abandonment in the context of global environmental change. Global Environmental Change, 21, 108–120.
McLeman, R. A., Dupre, J., Berrang-Ford, L., Ford, J., Gajewski, K., & Marchildon, G. R. (2014). What we learned from the Dust Bowl: Lessons in science, policy, and adaptation. Population and Environment, 35, 417–440.
Mertz, O., Mbow, C., Reenberg, A., & Diouf, A. (2009). Farmers’ perceptions of climate change and agricultural adaptation strategies in rural Sahel. Environmental Management, 43, 804–816.
Moreno, T., Querol, X., Castillo, S., Alastuey, A., Cuevas, E., Hermann, L., et al. (2006). Geochemical variations in Aeolian mineral particles from the Sahara-Sahel dust corridor. Chemosphere, 65, 261–270.
Mulitza, S., Heslop, D., Pittauerova, D., Fischer, H., Meyer, I., Stuut, J. B., et al. (2010). Increase in African dust flux at the onset of commercial agriculture in the Sahel region. Nature Letters, 466, 226–228.
Muller, R., Pistorius, T., Rohde, S., Gerold, G., & Pacheco, P. (2013). Policy options to reduce deforestation based on a systematic approach of drivers and agents in lowland Bolivia. Land Use Policy, 30, 895–907. https://doi.org/10.1016/j.landusepol.2012.06.019.
Nicholson, S. E. (1981). Rainfall and atmospheric circulation during drought periods and wetter years in West Africa. American Meteorological Society, 109, 2191–2208.
Nicholson, S. E. (1983). Sub-Saharan rainfall in the years 1976–1980: Evidence of continued drought. Monthly Weather Review, 111, 1646–1654.
Nicholson, S. E. (1985). Sub-Saharan rainfall 1981–84. Journal of Climate and Applied Meteorology, 24, 1388–1391.
Nicholson, S. E. (1995). Sahel, West Africa. Encyclopedia of Environmental Biology, 3, 261–275.
Nicholson, S. E. (2001). Climate and environmental change in Africa during the last two centuries. Climate Research, 17, 123–144.
Nicholson, S. E. (2013). The west African Sahel A review of recent studies on the rainfall regime and its interannual variability. ISRN Meteorology. https://doi.org/10.1155/2013/453521.
Nicholson, S. E. (2014). A detailed look at the recent drought situation in the Greater Horn of Africa. Journal of Arid Environments, 103, 71–79.
Nicholson, S. E., Tucker, C. J., & Ba, M. B. (1998). Desertification, drought, and surface vegetation: An example from the West African Sahel. Bulletin of the American Meteorological Society, 79(5), 815–829.
Nielsen, J. Ø., D’Haen, S., & Reenberg, A. (2012). Adaptation to climate change as a development project: A case study from Northern Burkina Faso. Climate and Development, 4(1), 16–25.
Nielsen, J. Ø., & Reenberg, A. (2010). Cultural barriers to climate change adaptation: A case study from Northern Burkina Faso. Global Environmental Change, 20(1), 142–152. https://doi.org/10.1016/j.gloenvcha.2009.10.002.
Nka, B. N., Oudin, L., Karambiri, H., Paturel, J. E., & Ribstein, P. (2015). Trends in floods in West Africa: Analysis based on 11 catchments in the region. Hydrology and Earth System Sciences, 19, 4707–4719.
Noble, I., & Huq, S. (2014). Adaptation needs and options. New York: Cambridge University Press. (chapter 14).
O’Connor, D., & Ford, J. (2014). Increasing the effectiveness of the “Great Green Wall” as an adaptation to the effects of climate change and desertification in the Sahel. Sustainability, 6, 7142–7154. https://doi.org/10.3390/su6107142.
Ochola, S., Eitel, B., & Olago, D. (2010). Vulnerability of schools to floods in Nyando River catchment, Kenya. Disaster, 34(3), 732–754.
Ologunorisa, T., & Adeyemo, A. (2005). Public perception of floods hazard in the Niger Delta, Nigeria. The Environmentalist, 25, 39–45.
Ozer, P., Erpicum, M., Demaree, G., & Vandiepenbeeck, M. (2003). The Sahelian drought may have ended during the 1990s. Hydrological Sciences Journal, 48(3), 489–492. https://doi.org/10.1623/hysj.48.3.489.45285.
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.
Pierre, C., Kergoat, L., Bergametti, G., Mougin, E., Baron, C., Abdourhamane, A., et al. (2015). Modeling vegetation and wind erosion from a millet field and from a rangeland: Two Sahelian case studies. Aeolian, 19, 97–111.
Prospero, J., & Nees, R. (1976). Dust concentration in the atmosphere of the equatorial north Atlantic: Possible relationship to the Sahelian drought. Science, 196, 1196–1198.
Reenberg, A. (1994). Land-use dynamics in the Sahelian zone in eastern Niger-monitoring change in cultivation strategies in drought prone areas. Journal of Arid Environments, 27, 179–192.
Reynolds, J. F., Stafford, S. D. M., Lambin, E. F., Turner, B. L., Mortimore, M., Batterbury, S. P., et al. (2007). Global desertification: Building a science for dryland development. Science, 316, 847–851.
Rung, J., & Nguimalet, C. R. (2005). Physiogeographic features of the Oubangui catchment and environmental trends reflected in discharge and floods at Bangui 1911–1999, Central African Republic. Geomorphology, 70, 311–324.
Samimi, C., Fink, A. H., & Paeth, H. (2012). The 2007 floods in the Sahel: Causes, characteristics and its presentation in the media and FEWS NET. Natural Hazards and Earth System Sciences, 12, 313–325.
Sinclair, A. R. E., & Fryxell, J. M. (1985). The Sahel of Africa: Ecology of a disaster. Canadian Journal of Zoology, 63, 987–994.
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.
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.
Tarhule, A. (2005). Damaging rainfall and flooding: The other Sahel hazards. Climate Change, 72, 355–377.
Tengberg, A. (1995). Nebkha dunes as indicators of wind erosion and land degradation in the Sahel zone of Burkina Faso. Journal of Arid Environments, 30, 265–282.
Tschakert, P., Sagoe, R., Ofori-Darko, G., & Codjoe, S. N. (2010). Floods in the Sahel: An analysis of anomalies, memory, and anticipatory learning. Climate Change, 103, 471–502.
Turton, D., & Turton, P. (1984). Spontaneous resettlement after drought: An Ethiopian example. Disasters, 8(3), 178–189.
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.
Wang, B., Ding, Q., Fu, X., Jin, K., Shukla, J., & Doblas-Reyes, F. (2005). Fundamental challenge in simulation and prediction of summer monsoon rainfall. Geophysical Research Letters, 32, 15711. https://doi.org/10.1029/2005GL022734.
This work was supported by a grant from the Social Science and Humanities Research Council of Canada Grant Number 756-2016-0003.
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Epule, T.E., Ford, J.D. & Lwasa, S. Climate change stressors in the Sahel. GeoJournal 83, 1411–1424 (2018). https://doi.org/10.1007/s10708-017-9831-6