rainfall pattern in west africa

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rainfall pattern in west africa

(PDF) Rainfall Variability Patterns in West Africa: Case

Our finding of high variability in the minor rainfall season has implications for agricultural productivity in Ghana and countries in the West African region, which rely heavily on rain-fed...

Precipitation Variability in West Africa in the Context of Global ...

2021年5月21日 To investigate how the rising global temperature will affect the spatial pattern of rainfall in West Africa, the precipitation and potential evapotranspiration variables from ten

Rainfall variability patterns in Nigeria during the rainy season

2023年5月16日 The circulation patterns associated with rainfall formation at the western and southeastern parts of Nigeria are shown to be associated with SSTa over the tropical Atlantic

West African monsoon precipitation impacted by the South

2021年10月27日 In this study, we describe mechanisms by which SABB aerosols are likely to modulate the WAM dynamics and precipitation over southern West Africa.

Spatial Variation and Trend of Extreme Precipitation in

2020年9月18日 The present study aims to investigate first, the spatial variability and trends of extreme precipitation indices over West Africa using the high-resolution Climate Hazards Group InfraRed Precipitation with Station

Rainfall variabilities and droughts in the Savannah zone of Ghana

2020年11月1日 Agriculture has been identified as the most susceptible sector to climate-related hazards due to the direct impacts of rainfall and temperature variations on the sector. 19

Atmospheric circulation patterns that trigger heavy rainfall in West

In this study, a two-step atmospheric circulation pattern classification consisting of a seasonal and a subseasonal classification was developed for West Africa to describe the seasonal and

Modelling impacts of climate change on coastal West African rainfall

2021年10月11日 New studies emerging on the role of global climate modes on West African rainfall suggest the coupling between QBO and precipitation in three climatic zones in West

CLIMATE RISK PROFILE WEST AFRICA

Observed climate trends across West Africa include: higher temperatures; increased rainfall in some areas and reduced rainfall in others, with high interannual and interdecadal variability,

Spatio-Temporal Rainfall Patterns in Northern

2002年12月1日 Figures 5 a and b, which describe the general rainfall patterns over West Africa and . can be found below, show a plan view of its nor th – south movement. ITD, as used in this .

Understanding the variability of the rainfall dipole in

2021年2月23日 There is a well-known mode of rainfall variability associating opposite hydrological conditions over the Sahel region and the Gulf of Guinea, forming a dipole pattern. Previous meteorological observations show that the

Precipitation Variability in West Africa in the Context of Global ...

2021年5月21日 The annual mean temperature is about 18 °C, but the monthly mean can be more than 40 °C over the southern part of the Sahara. Rainfall patterns over this region are mostly affected by ocean currents and local features, such as topography. In terms of climatic zones, West Africa can be divided into three different regions.

West Africa’s deadly rainfall in 2022 made ‘80 times more likely ...

2022年11月30日 The authors were unable to find the signal of climate change in the region’s rainfall pattern, ... College London and co-author of the study – told the press briefing that as well as higher-than-average seasonal rainfall, West Africa also saw “extremely heavy short spikes of precipitation”.

Analysis of extreme rainfall in Oti River Basin (West Africa)

2021年2月1日 This study, therefore, assessed the variations in rainfall at a spatiotemporal scale in the Oti River Basin of West Africa for observed (1981–2010) and future periods (2021–2050) under the ...

Atmospheric circulation patterns that trigger heavy rainfall in West Africa

2022年3月25日 Classification of atmospheric circulation patterns (CP) is a common tool for downscaling rainfall, but it is rarely used for West Africa. In this study, a two-step classification procedure is proposed for this region, which is applied from 1989 to 2010 for the Sudan-Sahel zone (Central Burkina Faso) with a focus on heavy rainfall.

West African monsoon precipitation impacted by the South

2021年10月27日 The West African Monsoon (WAM) is a ... the total SDE patterns are not modified ... P., Fink, A. H. Kniffka, A. The potential of increasing man-made air pollution to reduce rainfall over ...

Identification of Potential Drought Areas in West Africa Under

2019年10月30日 The study investigates how the rising global temperature will affect the spatial pattern of rainfall and consequently drought in West Africa. The precipitation and potential evapotranspiration variables that are obtained from the Rossby Centre regional atmospheric model (RCA4) and driven by ten (10) global climate models under the RCP8.5 scenario were

Chapter 9: Africa Climate Change 2022: Impacts, Adaptation and

Climate. Increasing mean and extreme temperature trends across Africa are attributable to human-caused climate change (high confidence).{9.5.1, 9.5.2} Climate change has increased heat waves (high confidence) and drought (medium confidence) on land, and doubled the probability of marine heatwaves around most of Africa (high confidence).Multi-year droughts

Rainfall in South Africa

Cold fronts approach the Western Cape from the west, and pass over the province towards the east. These cold fronts bring days of soft rains, but the average annual rainfall in these areas is low. A major reason for the low rainfall is that the moist air comes from a cold ocean, which results in low evaporation levels. Special Rainfall Patterns

Rainfall trends in the African Sahel: Characteristics,

2019年6月4日 The main features of the rainfall climatology in West Africa. (a) Mean May–October rainfall (color shading); location of the African Easterly Jet (AEJ, magenta contour) as indicated by the 9 m/s contour of the easterly wind

Agricultural productivity in relation to climate and

2020年2月25日 Similar patterns were also found by Mueller, ... C. Land Degradation Assessment Using Residual Trend Analysis of GIMMS NDVI3g, Soil Moisture and Rainfall in Sub-Saharan West Africa from 1982 to 2012.

Vulnerability to climate change of cocoa in West Africa: Patterns ...

2016年6月15日 The West African cocoa belt, reaching from Sierra Leone to southern Cameroon, is the origin of about 70% of the world's cocoa (Theobroma cacao), which in turn is the basis of the livelihoods of about two million farmers.We analyze cocoa's vulnerability to climate change in the West African cocoa belt, based on climate projections for the 2050s of

Evaluating the performance of new CORDEX-Africa regional

2021年2月7日 West Africa rainfall pattern is highly variable in time and space and has been attributed to climate change marked by the continuous rise in extreme climate events' magnitude and intensity (Alexander 2016; IPCC 2014).Findings over decades have shown that increase in the concentration of atmospheric greenhouse gas (GHG) induced by anthropogenic activities

Climate change impacts and adaptation strategies for crops in West ...

2022年4月19日 Climate change has already affected West African agriculture through changes in rainfall patterns, characterised by strong inter-annual rainfall fluctuations, increased frequency of rainfall extremes and prolonged droughts (Salack et al 2016, Sultan et al 2019).Agriculture in West Africa is predominantly rain-fed and thus highly vulnerable to

Rainfall over the African continent from the 19th through the

2018年6月1日 West Africa. Rainfall variability in the Sahel (sector D) is relatively homogeneous over a large area, ... However, it is evident that a pattern similar to that of the 1980s prevailed, although with less extreme dry conditions in Northern-Hemisphere regions.

Spatio-Temporal Patterns of Rainfall Variability for Wet

PDF On Jan 17, 2020, Pouwèréou Nimon and others published Spatio-Temporal Patterns of Rainfall Variability for Wet Season over Togo in West Africa Find, read and cite all the research you ...

Climate change and variability in sub-Saharan Africa: A systematic ...

2023年8月15日 The current trends in climate change indicate that rainfall patterns across Africa (Fig. 3) vary greatly and manifest on different scales in ... by an average of 10–17%. Several ground studies (Akanbi et al., 2021; Dadzie, 2021), have corroborated this trend in West Africa, demonstrating the favourable influence of climate-smart ...

Mid-Holocene West African monsoon rainfall enhanced in EC

2024年5月18日 Proxy records have shown that the Mid-Holocene was a period of humid conditions across West Africa, with an enhanced West African Monsoon (WAM) and vegetated conditions in areas currently characterized by desert, often referred to as the Green Sahara. However, General Circulation Models regularly struggle with recreating this strengthened Mid

Hydrometeorological Extreme Events in West Africa: Droughts

2022年11月21日 West African rainfall is an important part of the global climate system that influences the Atlantic thermohaline circulation, hurricane activities, and dust transport. The water cycle is linked to the monsoon and its interannual to decadal variations. Over the past decades, West Africa has seen major climate variability with extended droughts that had negative

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