full_ZB18a {snvecR} | R Documentation |
The HNBody output of Zeebe & Lourens (2019) after some pre-processing using
prepare_solution()
. The wikipedia page on Orbital elements describes what the
components relate to in order to uniquely specify an orbital plane. The
function asks to download the files to the user's cache directory so that
they can be accessed more quickly in the future.
get_solution("full-ZB18a")
A data frame with 250,001 rows and 20 columns:
Time t
(days).
Time in thousands of years (kyr).
Semimajor axis a
in astronomical units (au).
Eccentricity e
(unitless).
Inclination I
(degrees).
Longitude of perihelion \varpi
(degrees).
Longitude of the ascending node \Omega
(degrees).
Argument of perihelion \omega
(degrees).
Mean anomaly M
(degrees).
The following columns were computed from the above input with prepare_solution()
:
Unwrapped longitude of perihelion \varpi
(degrees without
jumps).
Unwrapped longitude of the ascending node \Omega
(degrees without jumps).
Variable: e\sin(\varpi)
.
Variable: e\cos(\varpi)
.
Variable: 2\sin(0.5I)\sin(\Omega)
.
Variable: 2\sin(0.5I)\cos(\Omega)
.
Helper: \cos(I)
.
Helper: \cos(I)/2
.
The x
, y
, and z
-components of the
Eart's orbit unit normal vector \vec{n}
, normal to Earth's
instantaneous orbital plane.
All astronomical solutions by Zeebe can be found on http://www.soest.hawaii.edu/oceanography/faculty/zeebe_files/Astro.html.
They can be loaded into R quickly, using get_solution()
.
Zeebe, R. E., & Lourens, L. J. (2019). Solar System chaos and the Paleocene–Eocene boundary age constrained by geology and astronomy. Science, 365(6456), 926–929. doi:10.1126/science.aax0612.
Zeebe, R. E. and Lourens, L. J. (2022). A deep-time dating tool for paleo-applications utilizing obliquity and precession cycles: The role of dynamical ellipticity and tidal dissipation. Paleoceanography and Paleoclimatology. doi:10.1029/2021PA004349