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Global warming induced hybrid rainy seasons in the Sahel

dc.contributor.authorSalack, S.
dc.contributor.authorKlein, C.
dc.contributor.authorGiannini, A.
dc.contributor.authorSarr, B.
dc.contributor.authorWorou, O.N.
dc.contributor.authorBelko, N.
dc.contributor.authorBliefernicht, J.
dc.contributor.authorKunstman, H.
dc.date.accessioned2019-12-04T11:04:10Z
dc.date.available2019-12-04T11:04:10Z
dc.date.issued2016-10-05
dc.identifier.citationSalack, S., Klein, C., Giannini, A., Sarr, B., Worou, O.N., Belko, N., ... & Kunstman, H. (2016). Global warming induced hybrid rainy seasons in the Sahel. Environmental Research Letters, 11(10), 104008.
dc.identifier.issn1748-9326
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1359
dc.descriptionOpen Access Journal
dc.description.abstractThe small rainfall recovery observed over the Sahel, concomitant with a regional climate warming, conceals some drought features that exacerbate food security. The new rainfall features include false start and early cessation of rainy seasons, increased frequency of intense daily rainfall, increasing number of hot nights and warm days and a decreasing trend in diurnal temperature range. Here, we explain these mixed dry/wet seasonal rainfall features which are called hybrid rainy seasons by delving into observed data consensus on the reduction in rainfall amount, its spatial coverage, timing and erratic distribution of events, and other atmospheric variables crucial in agro-climatic monitoring and seasonal forecasting. Further composite investigations of seasonal droughts, oceans warming and the regional atmospheric circulation nexus reveal that the low-to-mid-level atmospheric winds pattern, often stationary relative to either strong or neutral El-Niño-Southern-Oscillations drought patterns, associates to basin warmings in the North Atlantic and the Mediterranean Sea to trigger hybrid rainy seasons in the Sahel. More challenging to rain-fed farming systems, our results suggest that these new rainfall conditions will most likely be sustained by global warming, reshaping thereby our understanding of food insecurity in this region.
dc.description.sponsorshipFederal Ministry for Education and Research, Germany
dc.format.extent1-11
dc.language.isoen
dc.subjectGlobal Warming
dc.subjectFarming Systems
dc.subjectFood Security
dc.subjectAgroclimatic
dc.titleGlobal warming induced hybrid rainy seasons in the Sahel
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpClimate Change, Agriculture and Food Security
cg.contributor.affiliationKarlsruhe Institute of Technology
cg.contributor.affiliationWest African Science Service Center on Climate Change and Adapted Land Use
cg.contributor.affiliationUniversity of Augsburg
cg.contributor.affiliationColumbia University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.regionWest Africa
cg.coverage.countryBurkina Faso
cg.coverage.countryEthiopia
cg.coverage.countryNiger
cg.coverage.countryNigeria
cg.coverage.countrySenegal
cg.coverage.countrySudan
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectClimate Change
cg.journalEnvironmental Research Letters
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid79455
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1088/1748-9326/11/10/104008


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