A 0.6 million year record of millennial-scale climate variability in the tropics

Kelly Ann Gibson, Larry C. Peterson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A ∼600 kyr long scanning X-ray fluorescence record of redox variability from the Cariaco Basin, Venezuela, provides insight into rapid climate change in the tropics over the past five glacial-interglacial cycles. Variations in the sediment accumulation of the redox-sensitive element molybdenum (Mo) can be linked to changes in Intertropical Convergence Zone migration and reveal that millennial-scale variability is a persistent feature of tropical climate over the past 600 kyr, including during periods of interglacial warmth. This new record supports the idea that high-frequency tropical climate variability is not controlled solely by ice volume changes, with implications for the role of high-latitude forcing of Intertropical Convergence Zone position and tropical hydrology on millennial timescales. Key Points Rapid climate change in the tropics is not dependent solely on ice volume

Original languageEnglish (US)
Pages (from-to)969-975
Number of pages7
JournalGeophysical Research Letters
Volume41
Issue number3
DOIs
StatePublished - Feb 16 2014

Keywords

  • rapid climate change in the tropics

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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