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

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doi: 10.1002/2013GL058846
Author(s): Gibson, Kelly Ann; Peterson, Larry C.
Author Affiliation(s): Primary:
University of Miami, Rosenstiel School of Marine and Atmospheric Science, Miami, FL, United States
Volume Title: Geophysical Research Letters
Source: Geophysical Research Letters, 41(3), p.969-975. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276 CODEN: GPRLAJ
Note: In English
Summary: 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. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved.
Year of Publication: 2014
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Atlantic Ocean; Cariaco Basin; Caribbean Sea; Cenozoic; Climate change; Glacial environment; Interglacial environment; Leg 165; North Atlantic; ODP Site 1002; Ocean Drilling Program; Paleo-oceanography; Paleoclimatology; Paleoenvironment; Quaternary; South America; Tropical environment; Upper Quaternary; Venezuela
Record ID: 2014068935
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom

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