Orbital tuning of marine sedimentary cores: An automatic procedure based on a 
general linear model

Grieger, Björn

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Orbital tuning of marine sedimentary cores: An automatic procedure based on a general linear model

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Grieger, Björn
MPI for Meteorology, Max Planck Society;

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Grieger, B. (1992). Orbital tuning of marine sedimentary cores: An automatic procedure based on a general linear model. Report / Max-Planck-Institut für Meteorologie, 079.

Cite as: https://hdl.handle.net/21.11116/0000-0001-87A0-1

Abstract

We present a method to optimize the chronology of marine cores by orbital tuning. In a ﬁrst step——and as an additional result—we calculate a model for the variation of the oxygen isotope abundance ratio throughout the core. The model consists of two components: One results from the convolution of the solar insolation at 65° on July 15 with an impulse response function which is calculated from the data, the other is an additional low-frequency component. The initial age-depth relation of the core can be optimized by minimizing the deviation between model and data. The results of applications on the Meteor core 13519 and the Ocean Drilling Program core site 658 are shown. With the optimized chronologies the model ﬁts the data quite well throughout the investigated cores.