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Variations in the strength of the North African Monsoon have been found to be strongly related to the stronger 23,000-year processional cycle. [ 2 ] [ 7 ] [ 8 ] The relationship between the precession cycle and the strength of the North African Monsoon exists because procession affects the amount of insolation received in a given hemisphere.
The major monsoon systems of the world consist of the West African, Asian–Australian, the North American, and South American monsoons. The term was first used in English in British India and neighboring countries to refer to the big seasonal winds blowing from the Bay of Bengal and Arabian Sea in the southwest bringing heavy rainfall to the area.
The modern, arid Sahara. The Sahara was not a desert during the African humid period. Instead, most of northern Africa was covered by grass, trees, and lakes. The African humid period (AHP; also known by other names) was a climate period in Africa during the late Pleistocene and Holocene geologic epochs, when northern Africa was wetter than today.
A map of Africa showing the ecological break around the Sahara Desert The climate of Africa is a range of climates such as the equatorial climate , the tropical wet and dry climate , the tropical monsoon climate , the semi-arid climate (semi-desert and steppe), the desert climate (hyper-arid and arid), the humid subtropical climate , and the ...
Rainfall north of the equator in Africa typically increases from July through September as the West African Monsoon kicks into gear. ... caused by climate change, it has been made more likely.” ...
North African climate cycles – climate variation driven by the North African Monsoon, with a period of tens of thousands of years. [34] the Arctic oscillation (AO) and Antarctic oscillation (AAO) – The annular modes are naturally occurring, hemispheric-wide patterns of climate variability. On timescales of weeks to months they explain 20 ...
The monsoon in North Africa saw abrupt changes on decadal timescales during the African humid period. This period, spanning from 15,000 to 5,000 years ago, also ended suddenly in a drier state. This period, spanning from 15,000 to 5,000 years ago, also ended suddenly in a drier state.
The North American monsoon is marked by a broad area of high pressure, usually parked in the Four Corners region, but the exact position of that high can influence exactly where (and how much ...