A 5 million year reconstruction of sea level, temperature, and sea water δ¹⁸O

Marine sediment records from the Oligocene and Miocene reveal clear 400,000-year (400-kyr) climate cycles related to variations in orbital eccentricity. These cycles are also observed in the Plio-Pleistocene records of the global carbon cycle. However they are absent in the Late Pleistocene ice-age...

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Bibliographic Details
Main Authors: de Boer, Bas, Lourens, Lucas Joost, van de Wal, Roderik S W
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Antarc*
Antarctica
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.855850
https://doi.org/10.1594/PANGAEA.855850
Description
Summary:Marine sediment records from the Oligocene and Miocene reveal clear 400,000-year (400-kyr) climate cycles related to variations in orbital eccentricity. These cycles are also observed in the Plio-Pleistocene records of the global carbon cycle. However they are absent in the Late Pleistocene ice-age record over the past 1.5 million years. Here, we present a simulation of global ice volume over the past 5 million years with a coupled system of four 3-D ice-sheet models. Our simulation shows that the 400-kyr long eccentricity cycles of Antarctica vary coherently with d13C records during the Pleistocene suggesting that they drive the long-term carbon cycle changes throughout the past 35 million years. The 400-kyr response of Antarctica is eventually suppressed by the dominant 100-kyr glacial cycles of the large ice sheets in the Northern Hemisphere (NH).

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