La2010: a new orbital solution for the long-term motion of the Earth

By Jacques Laskar, A. Fienga, Mickaël Gastineau, H. Manche. 2011

898 citations recorded by the source corpus.

We present here a new solution for the astronomical computation of the orbital motion of the Earth spanning from 0 to −250 Myr. The main improvement with respect to our previous numerical solution La2004 is an improved adjustment of the parameters and initial conditions through a fit over 1 Myr to a special version of the highly accurate numerical ephemeris INPOP08 (Integration Numerique Planetaire de l'Observatoire de Paris). The precession equations have also been entirely revised and are no longer averaged over the orbital motion of the Earth and Moon. This new orbital solution is now valid over more than 50 Myr in the past or into the future with proper phases of the eccentricity variations. Owing to the chaotic behavior, the precision of the solution decreases rapidly beyond this time span, and we discuss the behavior of various solutions beyond 50 Myr. For paleoclimate calibrations, we provide several different solutions that are all compatible with the most precise planetary ephemeris. We have thus reached the time where geological data are now required to discriminate between planetary orbital solutions beyond 50 Myr.

Subfields: Atmospheric Science, Molecular Biology, Oceanography

View Paper: https://www.semanticscholar.org/paper/b5492b9a823889122544d35c75f3e2f99791555a

How researchers see this paper

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In Atmospheric Science

1. Linda Hinnov
2. U. Röhl
3. T. Westerhold
4. Jacques Laskar

In Molecular Biology

1. Linda Hinnov
2. U. Röhl
3. T. Westerhold
4. Jacques Laskar

In Oceanography

1. Linda Hinnov
2. T. Westerhold
3. U. Röhl
4. Jacques Laskar

Citations in the corpus

• Astrochronology of the Early Turonian–Early Campanian terrestrial succession in the Songliao Basin, northeastern China and its implication for long-period behavior of the Solar System (2013, methodology): “An ATS was established by tuning to 405 kyr long eccentricity cycles interpreted in these sedimentary records to the La2010a astronomical model (Laskar et al., 2011); U–Pb zircon ages (He et al.”
• Time scale controversy: Accurate orbital calibration of the early Paleogene (2012, methodology): “…try to solve the dating dilemma by comparing the expression of the very long eccentricity-cycle minima in new orbital solutions for eccentricity (La2010 [Laskar et al., 2011a] and La2011 [Laskar et al., 2011b]) with geological data (Figure 1) that contain eccentricity-modulated precession cycles.”
• Cyclostratigraphy and its revolutionizing applications in the earth and planetary sciences (2013, methodology): “For the Mesozoic, minimal tuning is the only option: The 405 k.y. eccentricity cycle is the only reliable time-domain astronomical signal prior to ca. 50 Ma (Laskar et al., 2004a, 2011).”