A role for the tropical pacific coupled ocean-atmosphere system on milankovitch and millennial timescales. Part I: A modeling study of tropical pacific variability

Amy C. Clement, Mark Cane

Research output: Chapter in Book/Report/Conference proceedingChapter

62 Scopus citations

Abstract

Climate records from over much of the world show variability on both Milankovitch and millennial timescales. However, mechanisms in the climate system that have a global scale are lacking. In this two-part paper, we turn attention to a part of the system that is known from the modern climate record to be capable of organizing global scale climate events: the tropics. In the first part, we isolate this system using a coupled ocean-atmosphere model of the tropical Pacific. The model results demonstrate a tropical mechanism which can amplify Milankovitch forcing and generate a mean climate response. The model is also run for 150,000 years with no forcing. The results raise the possibility that millennial timescale variability can be generated within the tropics through non-linear interactions. In that case, power is to be expected over a range of frequencies, rather than in any particular narrow band. The second part of our study, presented in the following paper, will discuss the potential impact on the global climate of these mechanisms of tropical climate variability.

Original languageEnglish (US)
Title of host publicationMechanisms of Global Climate Change at Millennial Time Scales, 1999
EditorsLloyd D. Keigwin, Peter U. Clark, Robert S. Webb
PublisherBlackwell Publishing Ltd
Pages363-371
Number of pages9
ISBN (Electronic)9781118664742
ISBN (Print)9780875900957
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

Publication series

NameGeophysical Monograph Series
Volume112
ISSN (Print)0065-8448
ISSN (Electronic)2328-8779

ASJC Scopus subject areas

  • Geophysics

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    Clement, A. C., & Cane, M. (1999). A role for the tropical pacific coupled ocean-atmosphere system on milankovitch and millennial timescales. Part I: A modeling study of tropical pacific variability. In L. D. Keigwin, P. U. Clark, & R. S. Webb (Eds.), Mechanisms of Global Climate Change at Millennial Time Scales, 1999 (pp. 363-371). (Geophysical Monograph Series; Vol. 112). Blackwell Publishing Ltd. https://doi.org/10.1029/GM112p0363