Journal
SCIENCE
Volume 336, Issue 6086, Pages 1301-1304Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1218340
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Funding
- Swiss National Science Foundation (SNF)
- German Research Foundation (DFG)
- US NSF [ATM-0318445, ATM-0903099, ATM-0645291]
- Edinburgh University
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [0903099] Funding Source: National Science Foundation
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Records of atmospheric carbon dioxide concentration (P-CO2) and Antarctic temperature have revealed an intriguing change in the magnitude of interglacial warmth and P-CO2 at around 430,000 years ago (430 ka), but the global climate repercussions of this change remain elusive. Here, we present a stalagmite-based reconstruction of tropical West Pacific hydroclimate from 570 to 210 ka. The results suggest similar regional precipitation amounts across the four interglacials contained in the record, implying that tropical hydroclimate was insensitive to interglacial differences in P-CO2 and high-latitude temperature. In contrast, during glacial terminations, drying in the tropical West Pacific accompanied cooling events in northern high latitudes. Therefore, the tropical convective heat engine can either stabilize or amplify global climate change, depending on the nature of the climate forcing.
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