Interglacial hydroclimate in the tropical West Pacific through the Late Pleistocene

Science
A N MecklerJess F Adkins

Abstract

Records of atmospheric carbon dioxide concentration (P(CO(2))) and Antarctic temperature have revealed an intriguing change in the magnitude of interglacial warmth and P(CO(2)) 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(CO(2)) 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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Citations

Dec 7, 2013·Nature Communications·Linda K AyliffeBambang W Suwargadi
May 9, 2014·Proceedings. Biological Sciences·Scott V C GroomMichael P Schwarz
Dec 22, 2015·Scientific Reports·Margit H SimonIan R Hall
Sep 27, 2016·Nature Communications·Deniz ErogluJürgen Kurths
Aug 28, 2019·Annual Review of Marine Science·David McGee
Jul 5, 2017·Proceedings of the National Academy of Sciences of the United States of America·Michael BockHubertus Fischer

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