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Early Holocene greening of the Sahara requires Mediterranean winter rainfall

يتطلب خضرة الهولوسين المبكرة للصحراء هطول أمطار شتوية في البحر الأبيض المتوسط

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type , Journal 31 May 2021 Peru, France, Peru Publisher:Proceedings of the National Academy of SciencesJournal:Proceedings of the National Academy of Sciences, volume 118 (issn: 0027-8424, eissn: 1091-6490,

Authors: Rachid Cheddadi; Matthieu Carré; Majda Nourelbait; Louis François; Ali Rhoujjati; Roger Manay; Diana Ochoa; +1 Authors

doi: 10.1073/pnas.2024898118 , 10.60692/rp96p-kzj43 , 10.60692/wet4h-pyr39

pmid: 34074769

pmc: PMC8201883

handle: 20.500.12866/9483

Early Holocene greening of the Sahara requires Mediterranean winter rainfall

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Abstract

Significance Explaining the greening of the Sahara during the Holocene has been a challenge for decades. A strengthening of the African monsoon caused by increased summer insolation is usually cited to explain why the Sahara was vegetated from 14,000 to 5,000 y ago. Here, we provide a unique climate record of quantified winter, spring, and summer precipitation in Morocco over the past 18,500 y, and numeric simulations, which show that moisture contributions from the Mediterranean Sea and the North Atlantic Ocean in winter, were as important as the expanded summer monsoon for the greening of the Sahara during the African humid period. The findings of this study will help to better understand and simulate climate variability over northern Africa.

Countries

Peru, France, Peru

Related Organizations

Laboratoire Parole et Langage
France
Chouaib Doukkali University
Morocco
Cadi Ayyad University
Morocco
University of Bremen
Germany
Universidad Peruana Cayetano Heredia
Peru

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Keywords

Atmospheric Science, Monsoon, Physical geography, Period (music), 550, https://purl.org/pe-repo/ocde/ford#1.05.03, paleoclimate reconstructions, [PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], Precipitation, 910, Oceanography, Environmental science, vegetation model simulations, Meteorology, green Sahara, Insolation, Climate change, Biology, Earth-Surface Processes, Climatology, African humid period, Holocene, Geography, Ecology, Aeolian Geomorphology and Wind Erosion Dynamics, Causes and Impacts of Climate Change Over Millennia, Physics, Geology, FOS: Earth and related environmental sciences, Acoustics, Greening, Earth and Planetary Sciences, Climate Change and Paleoclimatology, Archaeology, FOS: Biological sciences, Physical Sciences, Mediterranean sea, Monsoon Dynamics, Mediterranean climate

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