Atmospheric CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; estimates for the Miocene to Pleistocene based on foraminiferal &amp;lt;i&amp;gt;δ&amp;lt;/i&amp;gt;&amp;lt;sup&amp;gt;11&amp;lt;/sup&amp;gt;B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific
Climate of the past