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On the origin of the long period sawtooth shape of the Late Pleistocene paleoclimate Records: The first derivative of the Earth's orbital eccentricity
Author(s) -
Rial J. A.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01811
Subject(s) - sawtooth wave , paleoclimatology , eccentricity (behavior) , geology , proxy (statistics) , climatology , orbital period , orbital eccentricity , time derivative , climate change , paleontology , physics , astrophysics , mathematics , statistics , stars , oceanography , computer science , political science , law , computer vision , quantum mechanics
The first time derivative of the earth's orbital eccentricity function is sawtooth shaped, and closely mimics the ∼100,000 yr cycles of the oxygen isotope δ 18 O time series (the proxy for global ice volume change) of the last ∼800,000 yr. Conversely, numerical integration of the data's variance closely reproduces the orbital eccentricity function for the same interval. Such long‐lived, strong correlation does not appear to be coincidental, is consistent with the physics of ice sheets and with the time history of their advance and retreat.