get_solution: Get an Astronomical Solution

In snvecR: Calculate Earth’s Obliquity and Precession in the Past

Get an Astronomical Solution

Description

Download supported astronomical solutions from the web and store it in the user's cache directory. The next use of the function will load the data from the cache rather than downloading it again. This also provides a wrapper for astrochron::getLaskar() if one of their supported solutions is specified, but converts the output to a tibble. Note that we do not cache these solutions locally, however.

Usage

get_solution(
  astronomical_solution = "full-ZB18a",
  quiet = FALSE,
  force = FALSE
)

Arguments

astronomical_solution	Character vector with the name of the desired solution. Defaults to "full-ZB18a".
quiet	Be quiet? If TRUE, hide info messages. If FALSE (the default) print info messages and timing.
force	Force re-downloading the results, even if the solution is saved to the cache.

Value

A tibble with the astronomical solution (and some preprocessed new columns).

References

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. \Sexpr[results=rd]{tools:::Rd_expr_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. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1029/2021PA004349")}

See Also

full_ZB18a, ZB17, ZB18a_100, ZB18a_300 ZB20, PT_ZB18a, ZB23

Examples

get_solution("full-ZB18a")    # input for snvec
get_solution("ZB18a-300")     # eccentricity
get_solution("ZB20a")
get_solution("La11")
get_solution("PT-ZB18a(1,1)") # pre-computed precession-tilt
get_solution("ZB23.R01")      # one of the 3.6 Gyr solutions

snvecR documentation built on April 4, 2025, 12:12 a.m.