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This is the latest accepted revision, reviewed on 23 October 2024. The Niger River (/ ˈnaɪdʒər / NY-jər; French: (le) fleuve Niger [ (lə) flœv niʒɛʁ]) is the main river of West Africa, extending about 4,180 kilometres (2,600 miles). Its drainage basin is 2,117,700 km 2 (817,600 sq mi) in area. [ 11 ]
The average annual precipitation in the Lake Chad area is 330 mm (13 in), with an average annual precipitation of 560 mm (22.0 in) on the south bank and about 250 mm (9.8 in) on the north bank. The highest temperature in the rainy season is 30 °C (86 °F), and the highest temperature rises to more than 32 °C (90 °F) when October and November ...
Increasing temperatures tend to increase evaporation which leads to more precipitation. As average global temperatures have risen, average global precipitation has also increased. Precipitation has generally increased over land north of 30°N from 1900 to 2005, but declined over the tropics since the 1970s.
Precipitation is a major component of the water cycle, and is responsible for depositing fresh water on the planet. Approximately 505,000 cubic kilometres (121,000 cu mi) of water falls as precipitation each year: 398,000 cubic kilometres (95,000 cu mi) over oceans and 107,000 cubic kilometres (26,000 cu mi) over land. [4]
The current annual GMST is about 15 °C (59 °F), [6] though monthly temperatures can vary almost 2 °C (4 °F) above or below this figure. [7] The data clearly shows a rising trend in global average surface temperatures (i.e. global warming) and this is due to emissions of greenhouse gases from human activities.
Global average temperatures show that the Little Ice Age was not a distinct planet-wide period but a regional phenomenon occurring near the end of a long temperature decline that preceded recent global warming. [1] The Little Ice Age (LIA) was a period of regional cooling, particularly pronounced in the North Atlantic region. [2]
The average annual rainfall in Enugu is around 2,000 millimetres (79 in), which arrives intermittently and becomes very heavy during the rainy season. [55] Other weather conditions affecting the city include Harmattan, a dusty trade wind lasting a few weeks of December and January. [56] Like the rest of Nigeria, Enugu is hot all year round.
Climate change in Africa. Graph showing temperature change in Africa between 1901 and 2021, with red colour being warmer and blue being colder than average (The average temperature during 1971–2000 is taken as the reference point for these changes.) Climate change in Africa is an increasingly serious threat as Africa is among the most ...