Towards a wetter Sudano‐Sahelian ecological zone in twenty‐first century Nigeria

Odekunle, Theophilus O.; Andrew, Oniarah; Aremu, Sholademi O.

doi:10.1002/wea.172

Cited by 41 publications

(32 citation statements)

References 13 publications

(35 reference statements)

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“…However, there were occasional respites such as in 1990 (for Kano), 1980and 1981for Nguru, 1988, 1990and 1992for Sokoto, 1971for Dutse, 1978, 1988and 1990to 1993 Trend in annual rainfall over the Sudano-Sahelian Ecological Zone of Nigeria indicated that there has been an overall increase in the annual rainfall for the entire period under study with a recession in 1970s and 1980s due to the well researched drought of 1972/73 and 1980s in the Zone. Many studies in the Sudano-Sahelian Ecological Zone of West Africa in general, and Nigeria in particular, have established a general trend in rainfall towards aridity at the drought years (Powel et al, 1999a;Nicholson, 2001;Hulme et al, 2001;Dami, 2008;Odekunle et al, 2008). Recently, however, some scenarios (based on greenhouse gas emissions) have suggested that the observed trend towards aridity will be put on hold or be reversed in the twenty-first century (Smith et al, 2000;Haarsma et al, 2005).…”

Section: Presentation Of Results and Discussionmentioning

confidence: 99%

“…This ecological zone house 25% of the Nigerian population supports three-quarter of cattle population, about 75% of the goats and sheep, and almost all the donkeys, camels and horses found in the country. Major cereals such as cow peas, groundnut and cotton are the main crops grown in the region (Odekunle et al, 2008) The climate of the zone is dominated by the influence of three major meteorological features, namely; the Tropical Maritime (mT) air-mass, the Tropical Continental (cT) air-mass, and the equatorial easterlies. The first two air-masses (mT and cT) meet along a slanting surface called the inter-tropical discontinuity (ITD); the equatorial easterlies are rather erratic and relatively cool air masses from the east in the upper troposphere along the ITD.…”

Section: Study Areamentioning

confidence: 99%

“…Climate change studies have revealed that droughts will become more rampant and extreme rainfall events more frequent if the trend is not controlled (Fredrick & Major, 1997). Recent researches (Odekunle et al, 2008, Dami, 2008Ojoye, 2012) have revealed that rainfall pattern over the Sudano Sahelian Ecological zone of Nigeria have shifted from the dry epochs to increasingly wet epochs with more than halve of this increase due to heavy rainfall events (> 50 mm per day). The combination of dry periods interspersed with larger individual rainfall events will result in extended periods of soil moisture and variability in soil water content.…”

Section: Introductionmentioning

confidence: 99%

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Rainfall Trends in the Sudano-Sahelian Ecological Zone of Nigeria

Ifabiyi¹,

Ojoye²

2013

ESR

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The trends of rainfall have a great impact on the hydrologic cycle and therefore affect both the quality and quantity of water resources. There is therefore the need to examine the trend of rainfall in Sudano-Sahelian Ecological Zone of Nigeria comprising Kebbi, Sokoto, Kano, Jigawa, Yobe, Katsina and Borno States. The study examined the trend in rainfall patterns over a period of fifty years i.e. 1960-2009 so as to know the effect of rainfall variability in the occurrence of drought and flood in the zone. The study makes use of rainfall data, which were collected from the Nigeria Meteorological Agency, Oshodi, Lagos. The Standardized Anomaly Index was used to test for fluctuations in rainfall while the Spearman Rank Statistics was used to look for the trend in rainfall. The study revealed that there was a downward trend in rainfall amounts in the 1970s and 1980s which was responsible for the drought episodes of 1972/73 and 1980 and an upward trend in the amount of rainfall between 1990 and 2009 which accounts for the flood episodes in Northern Nigeria. There is a general increase of 5% in annual rainfall over the entire fifty years under study in the zone due to an observable 5.4% increase in mean rain-days and 4% increase in the rains that fall as heavy rain, which was found to be responsible for the increase in runoff, ground water recharge and the frequent flood episodes in the zone. Based on this study, it can therefore be concluded that the Sudano-Sahelian Ecological Zone of Nigeria has been experiencing an increase in the annual rainfall with little recession in 1970s and 1980s, the rainfall has been very high and this has significant consequences on water resources in the zone with the zone becoming prone to flood events, erosion and sedimentation which may have adverse effect on both quantity and quality of water available for human consumption. The study therefore recommends that a study of the interactions between the ecosystems due to the distortion in the hydrology of the zone should be carried out among others.

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Section: Presentation Of Results and Discussionmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rainfall Trends in the Sudano-Sahelian Ecological Zone of Nigeria

Ifabiyi¹,

Ojoye²

2013

ESR

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“…The large variability in time and space requires that, for accurate unbiased results, long-term climate analyses can be based on homogeneous data. A homogeneous climate data series could be defined as one where variations are caused only by variations in weather and climate [4]. A careful study of outdoor sculptures in Southwest Nigeria reveals a range of different types of sculptures, discovers the history behind these sculptures, and what they mean to the people.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Significance of Weather and Climatic Trend on Outdoor Sculptures in Southwest, Nigeria

Oluwasegun¹,

Yemi²,

Emanuel³

et al. 2016

J Environ Anal Toxicol

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“…highlands!to!the!Chad!Basins! [8].The!climate!of!the!area!is!dominated!by!Tropical!continental! to!the!north!and!Tropical!hinterland!to!the!south.!The!average!annual!rainfall!of!about!500!mm!…”

Section: Introduction)mentioning

confidence: 99%

Mild and Moderate Droughts in Savanna Ecological Zone Of Nigeria

Olatunde¹,

2016

ASSRJ

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Towards a wetter Sudano‐Sahelian ecological zone in twenty‐first century Nigeria

Cited by 41 publications

References 13 publications

Rainfall Trends in the Sudano-Sahelian Ecological Zone of Nigeria

Rainfall Trends in the Sudano-Sahelian Ecological Zone of Nigeria

Analysis and Significance of Weather and Climatic Trend on Outdoor Sculptures in Southwest, Nigeria

Mild and Moderate Droughts in Savanna Ecological Zone Of Nigeria

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