ArticleScience advances2022
A predominantly tropical influence on late Holocene hydroclimate variation in the hyperarid central Sahara.
Article in Science advances, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Article
- Climate, biogeography, and human resilience in the demographic history of the Canary Islands during the Amazigh period.Scientific reports · 2025Article
- Orbitally forced and internal changes in West African rainfall interannual-to-decadal variability for the last 6000 years.Climate dynamics · 2024Article
- Pyramid building and collapse.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
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Authors and funding
11 authors.
Funding
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Abstract
The climate history of the Sahara desert during recent millennia is obscured by the near absence of natural climate archives, hampering insight in the relative importance of southerly (tropical) and northerly (midlatitude) weather systems at submillennial time scales. A new lake sediment record from Ounianga Serir oasis in northern Chad, spanning the Late Holocene without interruption, confirms that immediately before ca 4200 years ago, the Sahara experienced an episode of hyperaridity even more extreme than today's desert climate. The hypersaline terminal lake which formed afterwards never desiccated during the late Holocene due to continuous inflow of fossil groundwater, yet its water balance was sensitive to temporal variation in local rainfall and lake surface evaporation. Our in-lake geochemical proxies show that, during the last 3000 years, century-scale hydroclimate variation in the central Sahara primarily tracked the intensity of the tropical West African monsoon, modulated at shorter time scales by weather patterns linked to shifts in midlatitude Atlantic Ocean circulation.
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