Feb 23, 2021· West African rainfall variability pattern and its relation to SST. Studies using observational data and atmospheric modelling have confirmed that SST anomalies over the equatorial Atlantic are responsible for the summer rainfall dipole pattern over West Africa at interannual timescales (Rodwell and Hoskins 1996; Rowell et al. 1995).
• Growing climate divide between the west and east parts of the West African Sahel, with less rainfall in the west • Marked periods of decadal rainfall variability shifting toward interannual • Decreased rainfall from 1901 to 2013 of -6 percent (Senegal, The Gambia), -4 percent (Burkina Faso,
Eastern Africa, classically presented as a major dry climate anomaly region in the otherwise wet equatorial belt, is a transition zone between the monsoon domains of West Africa and the Indian Ocean. Its complex terrain, unequaled in the rest of Africa, results in a huge diversity of climatic conditions that steer a wide range of vegetation landscapes, biodiversity and human occupations.
Percent of normal rainfall for parts of West Africa extending east to South Sudan from May-September, 2016. Average to above-average precipitation was recorded over much of the region. NOAA Climate.gov map based on CPC's Africa Rainfall Climatology version 2 (ARC2) dataset, which uses satellite and rain-gauge input.
This report provides a general overview of the regional climate in West Africa. A follow-up report that provides a specific focus on the climate of the semi-arid regions of West Africa is currently under development. 1.1 General overview The climate across West Africa varies from arid desert conditions in the north to humid
The rainiest area is the south, where precipitation is above 1,500 millimeters (60 inches) per year, and even more so the small west coast area, where it reaches 2,000 mm (80 in) per year. The driest areas are the north, where the rainfall amounts to around 1,000 mm (40 in) per year, and the eastern coast, which includes Accra, where it drops ...
The impacts of partial deforestation also differ across Africa. In West Africa, even moderate tree cover loss (i.e. 30%) reduces rainfall magnitude whereas in Central and Southern Africa, a threshold of 70% tree cover loss is required to reduce rainfall magnitude.
• In West Africa crop prospects are generally favourable due to good seasonal rainfall except in areas affected by ongoing conflict. Harvesting of main season crops is complete in some areas and will complete across the Sahel in December.
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 at 600 hPa; maximum African Easterly Waves (AEW, orange color; contour retraced from Figure 5a in Thorncroft & Hodges, 2001) as indicated by the a track density …
• Growing climate divide between the west and east parts of the West African Sahel, with less rainfall in the west • Marked periods of decadal rainfall variability shifting toward interannual • Decreased rainfall from 1901 to 2013 of -6 percent (Senegal, The Gambia), -4 percent (Burkina Faso,
West Africa, the home for more than 300 million people, is one of the most vulnerable regions to global warming due to its high exposure and low adaptive capacity (Barros et al. 2015).The agriculture-based economy of the region highly relies on the West African Monsoon (WAM), which produces a mean annual rainfall of 150–2500 mm.
A statistical analysis has been made of long-term rainfall records from West Africa. No established trends or periodicities can be detected, and the recent succession of drought years falls within ...
The IPCC expects Central Africa to see a decrease in the length of wet spells and a slight increase in heavy rainfall. West Africa has been identified as a climate-change hotspot, with climate ...
found that the July to September global SST pattern is strongly correlated with October to December seasonal rainfall aggregated for a large sector of eastern Africa extending from 5°N, in Kenya, southward to Malawi at 15°S. They developed a multiple linear regression forecast model based on three rotated EOFs for SSTs in the northwest ...
By Seheouvi M. David Agoungbome
The Southern African group has a relatively low rainfall index and a variability that exceeds that of the Sahel. There are some common features between this group and Group 2, e.g. dry years in 1973, 1982, 1983 and 1992, but also notable differences, for instance in 1985 and 1993.
Rainfall Variability Patterns in West Africa: Case of Cote d'Ivoire and Ghana. ... (JFM) and October–December (OND) seasons whereas an increase (~0.5°C) is projected …
Traditional shifting cultivation which is dependent on heavy rainfall and sunshine has for centuries been used as the chief method of farming in the tiny and yet impoverished West African nation.
However, the most interesting signals are obtained with consideration of the West African rainfall anomaly patterns. Large droughts over Sahelian and Guinean areas are significantly associated with a less southward extension of upper easterlies and a decrease of the upper-meridional diffluence in the Hadley circulation.
Mean annual rainfall 1981–2014, with number of months of 50 mm or more of rainfall. Download High Resolution. West Africa's climate is controlled by the interaction of two air masses, the influence of which varies throughout the year with the north-south movement of …
Rainfall patterns dictate timing. Strzok said most people in West Africa are farmers, and their schedule is governed by the rainy season, from May to October. Once the rains are sufficient, everyone plants crops, such as rice, sorghum, millet, peas, and peanuts.
The migration of the inter-tropical convergence zone (ITCZ) in Africa affects seasonal precipitation patterns across that continent. The blue shading on the map shows the areas of highest cloud reflectivity, which correspond to the average monthly position of the ITCZ.
A regional precipitation analysis from a total of 813 recording stations in 11 West African countries for the drought period 1968–75 is presented. Results illustrate the severity and extent of meteorological drought which prevailed throughout the region and reached greatest magnitude in 1973.
placement of the Sahel rain band (see, e.g. Cook and Vizy, 2006). Direct observations of rainfall thus stand as the main source of information for such trend detec-tion research. This study consequently seeks to better documenting recent trends in extreme rainfall in West Africa, based on long series of daily rainfall covering
UN Climate Change News, 27 October 2020 – Increasing temperatures and sea levels, changing precipitation patterns and more extreme weather are threatening human health and safety, food and water security and socio-economic development in Africa, according to a new report devoted exclusively to the continent. The State of the Climate in Africa 2019 report, a multi-agency publication ...
Climate change is affecting rainfall variability. This paper investigated the June-September (JJAS) rainfall variability using reanalyzed and observed da-tasets from 1976 to 2015 in Togo. The rotated empirical orthogonal function (REOF) method was used to get the distribution patterns of JJAS rainfall. The Mann-Kendall (MK) statistic was also used to detect temporal trend of the ro-tated ...
when rainfall should be seasonable at this time of the year. The October-December season has started across Ethiopia, northern Somalia, and Uganda this past week (Figure 2). While a retreat of rain is observed across southern Sudan, 50-75mm of rain prevailed across western and southern Ethiopia. Eastern Uganda recorded
This profile provides an overview of climate risk in 21 countries in West Africa. As one of the world's most vulnerable regions to climate variability and change, the profile provides a regional climate summary and projected changes, along with suggested responses to identified risks that will improve climate resilience. Climate risks, impacts, adaptation responses are examined by key ...
Fraud Reporting Details. Toll Free Number: 0800 111 527. Email: [email protected]. Toll free fax:0800 212 689. Postal: FREEPOST KZN665, MUSGRAVE, 4062. SMS Short Code: 33490. Historical Rain. Month January February March April May June July August September October November December.
Nka, Oudin, Karambiri, Paturel, and Ribstein (2015) compared the current flood trends in West Africa to trends in rainfall and vegetation indices over the period 1981-2006. They found that ...
Physical Geography of West Africa. The 8 million square kilometers and 17 countries covered by this atlas encompass a wide range of landscapes from alluvial valleys in Senegal and Ghana, sandy plains and low plateaus across the Sahel, and rolling hills of Togo to rugged mountains with summits reaching over 1,500 m in Guinea and 1,800 m in Niger.
Temperature: 1st Figure = Average Low. 2nd Figure = Average High. Rainfall = Average rainfall. Please Note: The data shown above are averages and actual amounts may vary. African Safari - Home Site Map Currency Converter Search Links Blog Africa Weather Budget Safaris Photo Safaris.