PT_ZB18a

PT-ZB18a

"PT-ZB18a(1,1)"

"PT-ZB18a(1,0)"

Astronomical Solutions PT-ZB18a(x.xxxx,y.yyyy) for the past 100 Myr

Easily calculate precession and obliquity from an orbital solution (defaults to ZB18a from Zeebe and Lourens (2019) <doi:10.1126/science.aax0612>) and assumed or reconstructed values for tidal dissipation (Td) and dynamical ellipticity (Ed). This is a translation and adaptation of the 'C'-code in the supplementary material to Zeebe and Lourens (2022) <doi:10.1029/2021PA004349>, with further details on the methodology described in Zeebe (2022) <doi:10.3847/1538-3881/ac80f8>. The name of the 'C'-routine is 'snvec', which refers to the key units of computation: spin vector s and orbit normal vector n.

Ilja Kocken

snvecR

Calculate Earth’s Obliquity and Precession in the Past

Richard Zeebe

PT_ZB18a function

<div class="section" id="get-solution-pt-zb-a-">
<h3><code>get_solution("PT-ZB18a(1,1)")</code></h3>
A data frame with 249,480 rows and 4 columns:<dl>
<dt>time</dt>
<dd>Time in thousands of years (kyr).</dd><dt>epl</dt>
<dd>Obliqity \(\epsilon\) (radians).</dd><dt>phi</dt>
<dd>Axial Precession \(phi\) (radians).</dd><dt>cp</dt>
<dd>Climatic Precession \(e sin(\bar{\omega})\) (unitless).</dd>
</dl></div>

Format

Astronomical Solutions PT-ZB18a(x.xxxx,y.yyyy) for the past 100 Myr — PT_ZB18a

<div class='section' id='get-solution-pt-zb-a-'>
<h3><code>get_solution("PT-ZB18a(1,1)")</code></h3>


A data frame with 249,480 rows and 4 columns:<dl>
<dt>time</dt>
<dd>Time in thousands of years (kyr).</dd>

<dt>epl</dt>
<dd>Obliqity \(\epsilon\) (radians).</dd>

<dt>phi</dt>
<dd>Axial Precession \(phi\) (radians).</dd>

<dt>cp</dt>
<dd>Climatic Precession \(e sin(\bar{\omega})\) (unitless).</dd>


</dl>

</div>

PT_ZB18a: Astronomical Solutions PT-ZB18a(x.xxxx,y.yyyy) for the past 100 Myr

Description

Arguments

Format

`get_solution("PT-ZB18a(1,1)")`

References