We know very, very little about the earth’s temperature record, really.
... or much of anything else where it concerns global processes on the Earth. You may recall back when they were foaming at the mouth about a big "ozone hole" opening up over Antarctica. Trouble is, they had no baseline to tell them whether or not it was normal. We really don't know, still if having ozone thin at the poles is some tragic thing caused by CFCs or whatever, or if it is related to sunspot cycles. (Which is what I suspect it actually was).
Conservation of angular momentum suggests that the atmosphere surrounding the Earth’s axes will be different than most of the other parts. Similar with the difference in tidal effects as mainly affected by the moon’s gravity as it rotates the Earth, not to mention the other gravitational effects from the other planets. Any long term climate analysis that does not take astrophysical elements into account is incomplete. I instinctively called the “ozone hole” and “greenhouse gasses” BS before I even studied any of that. (Physics)