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

被引：36

作者：

Gibson, Kelly Ann ^{[1
]}

Peterson, Larry C. ^{[1
]}

机构：

[1] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 03期

基金：

美国国家科学基金会;

关键词：

rapid climate change in the tropics; INTERTROPICAL CONVERGENCE ZONE; NORTH-ATLANTIC; CARIACO BASIN; RAPID CHANGES; CIRCULATION; GREENLAND; COLLAPSE; MONSOON; EVENTS; METALS;

D O I：

10.1002/2013GL058846

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A similar to 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.

引用

页码：969 / 975

页数：7

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