ArticleScience advances2018
Lake Tauca highstand (Heinrich Stadial 1a) driven by a southward shift of the Bolivian High.
Article in Science advances, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Article
- Delimitation of EndangeredAnimals : an open access journal from MDPI · 2024Article
- Population structure and microscale morphological differentiation in a freshwater snail from the Chilean Altiplano.BMC ecology and evolution · 2024Article
- Biospeleothems Formed by Fungal Activity During the Early Holocene in the "Salar de Uyuni".Frontiers in microbiology · 2022Article
- High- and low-latitude forcings drive Atacama Desert rainfall variations over the past 16,000 years.Science advances · 2021Article
- Andean drought and glacial retreat tied to Greenland warming during the last glacial period.Nature communications · 2020Article
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Authors and funding
13 authors.
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Abstract
Heinrich events are characterized by worldwide climate modifications. Over the Altiplano endorheic basin (high tropical Andes), the second half of Heinrich Stadial 1 (HS1a) was coeval with the highstand of the giant paleolake Tauca. However, the atmospheric mechanisms underlying this wet event are still unknown at the regional to global scale. We use cosmic-ray exposure ages of glacial landforms to reconstruct the spatial variability in the equilibrium line altitude of the HS1a Altiplano glaciers. By combining glacier and lake modeling, we reconstruct a precipitation map for the HS1a period. Our results show that paleoprecipitation mainly increased along the Eastern Cordillera, whereas the southwestern region of the basin remained relatively dry. This pattern indicates a southward expansion of the easterlies, which is interpreted as being a consequence of a southward shift of the Bolivian High. The results provide a new understanding of atmospheric teleconnections during HS1 and of rainfall redistribution in a changing climate.
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