Change point method for detecting regime shifts in paleoclimatic time series: Application to delta(18)O time series of the Plio-Pleistocene

DSpace/Manakin Repository

Change point method for detecting regime shifts in paleoclimatic time series: Application to delta(18)O time series of the Plio-Pleistocene

Show simple item record


dc.contributor.author Ruggieri, E.
dc.contributor.author Herbert, T.
dc.contributor.author Lawrence, Kira T.
dc.contributor.author Lawrence, C. E.
dc.date.accessioned 2011-12-01T18:44:02Z
dc.date.available 2011-12-01T18:44:02Z
dc.date.issued 2009
dc.identifier.citation Ruggieri, E., et al. (2009) "Change point method for detecting regime shifts in paleoclimatic time series: Application to delta(18)O time series of the Plio-Pleistocene." Paleoceanography 24: PA1204. en_US
dc.identifier.uri http://hdl.handle.net/10385/861
dc.description.abstract Although different paleoenvironmental time series resolve past climatic change at different time scales, nearly all share one characteristic: they are nonstationary over the length of the record sampled. We describe a recursive dynamic programming change point algorithm that is well suited to identify shifts in the Earth system's variability, as it represents a nonstationary time series as a series of regimes, each of which is homogeneous. The algorithm fits the data by minimizing squared errors not only over the parameters of the models for each subsequence but also over an arbitrary number of boundary points without restrictions on the lengths of regimes. The versatility of the algorithm is illustrated by an application to 5 Ma of Plio-Pleisotcene delta(18)O variations. We seek to identify either the single dominant "Milankovitch" frequency or linear combinations of frequencies and consistently identify changes similar to 780 ka and similar to 2.7 Ma, among others, in each analysis done. Our applications also provide support to the recent hypothesis that obliquity-based Milankovitch terms can account for the circa 100 ka cycle that empirically dominates the most recent 1 million years. en_US
dc.publisher Paleoceanography en_US
dc.title Change point method for detecting regime shifts in paleoclimatic time series: Application to delta(18)O time series of the Plio-Pleistocene en_US
dc.type Article en_US
dc.identifier.doi doi:10.1029/2007PA001568

Files in this item

Files Size Format View
Lawrence-Paleoceanography-vol24-PA1204-2009.pdf 1.093Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record

Search LDR


Advanced Search

Browse

My Account