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HandWiki. North African Climate Cycles. Encyclopedia. Available online: https://encyclopedia.pub/entry/34007 (accessed on 21 September 2026).
HandWiki. North African Climate Cycles. Encyclopedia. Available at: https://encyclopedia.pub/entry/34007. Accessed September 21, 2026.
HandWiki. "North African Climate Cycles" Encyclopedia, https://encyclopedia.pub/entry/34007 (accessed September 21, 2026).
HandWiki. (2022, November 11). North African Climate Cycles. In Encyclopedia. https://encyclopedia.pub/entry/34007
HandWiki. "North African Climate Cycles." Encyclopedia. Web. 11 November, 2022.
North African Climate Cycles
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The content is sourced from: https://handwiki.org/wiki/Earth:North_African_climate_cycles

North African climate cycles have a unique history that can be traced back millions of years. The cyclic climate pattern of the Sahara is characterized by significant shifts in the strength of the North African Monsoon. When the North African Monsoon is at its strongest, annual precipitation and consequently vegetation in the Sahara region increase, resulting in conditions commonly referred to as the "green Sahara". For a relatively weak North African Monsoon, the opposite is true, with decreased annual precipitation and less vegetation resulting in a phase of the Sahara climate cycle known as the "desert Sahara". Variations in the climate of the Sahara region can, at the simplest level, be attributed to the changes in insolation because of slow shifts in Earth's orbital parameters. The parameters include the precession of the equinoxes, obliquity, and eccentricity as put forth by the Milankovitch theory. The precession of the equinoxes is regarded as the most important orbital parameter in the formation of the "green Sahara" and "desert Sahara" cycle. A January 2019 MIT paper in Science Advances shows a cycle from wet to dry approximately every 20,000 years.

insolation climate cycles obliquity

References

  1. Ruddiman, William F. (2001). Earth's Climate: Past and Future. New York, NY: W.H. Freeman and Company. ISBN 9780716737414. 
  2. Kutzbach, J.E. (2 October 1981). "Monsoon Climate of the Early Holocene: Climate Experiment with the Earth's Orbital Parameters for 9000 Years Ago". Science 214 (4516): 59–61. doi:10.1126/science.214.4516.59. PMID 17802573. Bibcode: 1981Sci...214...59K.  https://dx.doi.org/10.1126%2Fscience.214.4516.59
  3. Larrasoaña, J. C.; Roberts, A. P.; Rohling, E. J.; Winklhofer, M.; Wehausen, R. (1 December 2003). "Three million years of monsoon variability over the northern Sahara". Climate Dynamics 21 (7–8): 689–698. doi:10.1007/s00382-003-0355-z. Bibcode: 2003ClDy...21..689L.  https://dx.doi.org/10.1007%2Fs00382-003-0355-z
  4. Gasse, Françoise (January 2000). "Hydrological changes in the African tropics since the Last Glacial Maximum". Quaternary Science Reviews 19 (1–5): 189–211. doi:10.1016/S0277-3791(99)00061-X. Bibcode: 2000QSRv...19..189G.  https://dx.doi.org/10.1016%2FS0277-3791%2899%2900061-X
  5. Tuenter, E.; Weber, S.L.; Hilgen, F.J.; Lourens, L.J. (May 2003). "The response of the African summer monsoon to remote and local forcing due to precession and obliquity". Global and Planetary Change 36 (4): 219–235. doi:10.1016/S0921-8181(02)00196-0. Bibcode: 2003GPC....36..219T.  https://dx.doi.org/10.1016%2FS0921-8181%2802%2900196-0
  6. Rossignol-Strick, Martine (7 July 1983). "African monsoons, an immediate climate response to orbital insolation". Nature 304 (5921): 46–49. doi:10.1038/304046a0. Bibcode: 1983Natur.304...46R.  https://dx.doi.org/10.1038%2F304046a0
  7. Rohling, E.J.; Hilgen, F.J. (1991). "The Eastern Mediterranean Climate at times of Sapropel Formation: a Review". Geologie en Mijnbouw 70: 253–264. ISSN 0016-7746.  http://www.worldcat.org/issn/0016-7746
  8. Rossignol-Strick, Martine; Nesteroff, Wladimir; Olive, Philippe; Vergnaud-Grazzini, Colette (14 January 1982). "After the deluge: Mediterranean stagnation and sapropel formation". Nature 295 (5845): 105–110. doi:10.1038/295105a0. Bibcode: 1982Natur.295..105R.  https://dx.doi.org/10.1038%2F295105a0
  9. Rossignol-Strick, Martine (April 1985). "Mediterranean Quaternary sapropels, an immediate response of the African monsoon to variation of insolation". Palaeogeography, Palaeoclimatology, Palaeoecology 49 (3–4): 237–263. doi:10.1016/0031-0182(85)90056-2. Bibcode: 1985PPP....49..237R.  https://dx.doi.org/10.1016%2F0031-0182%2885%2990056-2
  10. Drake, N.; Bristow, C. (1 September 2006). "Shorelines in the Sahara: geomorphological evidence for an enhanced monsoon from palaeolake Megachad". The Holocene 16 (6): 901–911. doi:10.1191/0959683606hol981rr. Bibcode: 2006Holoc..16..901D.  https://dx.doi.org/10.1191%2F0959683606hol981rr
  11. Pokras, Edward M.; Mix, Alan C. (8 April 1987). "Earth's precession cycle and Quaternary climatic change in tropical Africa". Nature 326 (6112): 486–487. doi:10.1038/326486a0. Bibcode: 1987Natur.326..486P.  https://dx.doi.org/10.1038%2F326486a0
  12. Gasse, Françoise; Stabell, Bjørg; Fourtanier, Elizabeth; van Iperen, Yolanda (20 January 2017). "Freshwater Diatom Influx in Intertropical Atlantic: Relationships with Continental Records from Africa". Quaternary Research 32 (2): 229–243. doi:10.1016/0033-5894(89)90079-3. Bibcode: 1989QuRes..32..229G.  https://dx.doi.org/10.1016%2F0033-5894%2889%2990079-3
  13. McIntyre, Andrew; Ruddiman, William F.; Karlin, Karen; Mix, Alan C. (February 1989). "Surface water response of the equatorial Atlantic Ocean to orbital forcing". Paleoceanography 4 (1): 19–55. doi:10.1029/PA004i001p00019. Bibcode: 1989PalOc...4...19M.  https://dx.doi.org/10.1029%2FPA004i001p00019
  14. deMenocal, Peter; Ortiz, Joseph; Guilderson, Tom; Adkins, Jess; Sarnthein, Michael; Baker, Linda; Yarusinsky, Martha (January 2000). "Abrupt onset and termination of the African Humid Period: rapid climate responses to gradual insolation forcing". Quaternary Science Reviews 19 (1–5): 347–361. doi:10.1016/S0277-3791(99)00081-5. Bibcode: 2000QSRv...19..347D.  https://dx.doi.org/10.1016%2FS0277-3791%2899%2900081-5
  15. Hoelzmann, P.; Jolly, D.; Harrison, S. P.; Laarif, F.; Bonnefille, R.; Pachur, H.-J. (March 1998). "Mid-Holocene land-surface conditions in northern Africa and the Arabian Peninsula: A data set for the analysis of biogeophysical feedbacks in the climate system". Global Biogeochemical Cycles 12 (1): 35–51. doi:10.1029/97GB02733. Bibcode: 1998GBioC..12...35H.  https://dx.doi.org/10.1029%2F97GB02733
  16. Drake, N. A.; Blench, R. M.; Armitage, S. J.; Bristow, C. S.; White, K. H. (27 December 2010). "Ancient watercourses and biogeography of the Sahara explain the peopling of the desert". Proceedings of the National Academy of Sciences 108 (2): 458–462. doi:10.1073/pnas.1012231108. PMID 21187416. Bibcode: 2011PNAS..108..458D.  http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3021035
  17. Foley, Jonathan A.; Coe, Michael T.; Scheffer, Marten; Wang, Guiling (1 October 2003). "Regime Shifts in the Sahara and Sahel: Interactions between Ecological and Climatic Systems in Northern Africa". Ecosystems 6 (6): 524–539. doi:10.1007/s10021-002-0227-0.  https://dx.doi.org/10.1007%2Fs10021-002-0227-0
  18. Ganopolski, A. (19 June 1998). "The Influence of Vegetation-Atmosphere-Ocean Interaction on Climate During the Mid-Holocene". Science 280 (5371): 1916–1919. doi:10.1126/science.280.5371.1916. Bibcode: 1998Sci...280.1916G. https://epic.awi.de/id/eprint/13564/1/Gan1998a.pdf. 
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