ArticleProceedings of the National Academy of Sciences of the United States of America2016
Galápagos hydroclimate of the Common Era from paired microalgal and mangrove biomarker 2H/1H values.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed.
- A strong Pacific Walker Circulation during the Little Ice Age.Science advances · 2026Article
- Tropical decadal variability in nutrient supply and phytoplankton community in the Central Equatorial Pacific during the late Holocene.Scientific reports · 2024Article
- Sedimentary biomarkers of human presence and taro cultivation reveal early horticulture in Remote Oceania.Communications earth & environment · 2024Article
- Deuterium in marine organic biomarkers: toward a new tool for quantifying aquatic mixotrophy.The New phytologist · 2022Article
- Interhemispheric antiphasing of neotropical precipitation during the past millennium.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Precipitation isotope time series predictions from machine learning applied in Europe.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Human settlement of East Polynesia earlier, incremental, and coincident with prolonged South Pacific drought.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Intertropical convergence zone variability in the Neotropics during the Common Era.Science advances · 2020Article
- Human-induced changes in the distribution of rainfall.Science advances · 2017Article
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2 authors.
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Abstract
Tropical maritime precipitation affects global atmospheric circulation, influencing storm tracks and the size and location of subtropical deserts. Paleoclimate evidence suggests centuries-long changes in rainfall in the tropical Pacific over the past 2,000 y, but these remain poorly characterized across most of the ocean where long, continuous proxy records capable of resolving decadal-to-centennial climate changes are still virtually nonexistent despite substantial efforts to develop them. Here we apply a new climate proxy based on paired hydrogen isotope ratios from microalgal and mangrove-derived sedimentary lipids in the Galápagos to reconstruct maritime precipitation changes during the Common Era. We show that increased rainfall during the Little Ice Age (LIA) (∼1400-1850 CE) was likely caused by a southward migration of the Intertropical Convergence Zone (ITCZ), and that this shift occurred later than previously recognized, coeval with dynamically linked precipitation changes in South America and the western tropical Pacific. Before the LIA, we show that drier conditions at the onset of the Medieval Warm Period (∼800-1300 CE) and wetter conditions ca. 2 ka were caused by changes in the El Niño/Southern Oscillation (ENSO). Collectively, the large natural variations in tropical rainfall we detect, each linked to a multicentury perturbation of either ENSO-like variability or the ITCZ, imply a high sensitivity of tropical Pacific rainfall to climate forcings.
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