Berger, A; Loutre, M-F (1999): Parameters of the Earths orbit for the last 5 Million years in 1 kyr resolution. PANGAEA, https://doi.org/10.1594/PANGAEA.56040, Supplement to: Berger, A; Loutre, M-F (1991): Insolation values for the climate of the last 10 million of years. Quaternary Science Reviews, 10(4), 297-317, https://doi.org/10.1016/0277-3791(91)90033-Q
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New values for the astronomical parameters of the Earth's orbit and rotation (eccentricity, obliquity and precession) are proposed for paleoclimatic research related to the Late Miocene, the Pliocene and the Quaternary. They have been obtained from a numerical solution of the Lagrangian system of the planetary point masses and from an analytical solution of the Poisson equations of the Earth-Moon system. The analytical expansion developed in this paper allows the direct determination of the main frequencies with their phase and amplitude. Numerical and analytical comparisons with the former astronomical solution BER78 are performed so that the accuracy and the interval of time over which the new solution is valid can be estimated. The corresponding insolation values have also been computed and compared to the former ones. This analysis leads to the conclusion that the new values are expected to be reliable over the last 5 Ma in the time domain and at least over the last 10 Ma in the frequency domain.
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|3||Eccentricity||ECC||413k component notched out|
|7||Extraterrestrial insolation||EXI||W/m2||mid-month insolation 65N for July|
|8||Sum normalized ECC, TILT,-PREC index||ETP||Calculated|
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