@Smokin Joe
I'm sorry, I was asking about ice ages and its definition and whether it has changed over recent years. At one time, as I remember, it was defined that glacial periods and interglacial periods all fell within an "ice age" and that we're currently in one. That there were periods millions of years ago that were far warmer than today when earth was not in an "ice age" and that there has been multiple cycles of hot and ice ages with the heat lasting the longest. From the looks of it now, all of the long term temperature plots and other info that showed that have slowly been purged to imply it is warmer than ever now - which is a lie.
@Elderberry
Here's one of the few that still call it an ice age:
"The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing.[1][2][3] Although geologists describe this entire period up to the present as an "ice age", in popular culture this term usually refers to the most recent glacial period, or to the Pleistocene epoch in general.[4] Since Earth still has polar ice sheets, geologists consider the Quaternary glaciation to be ongoing, though currently in an interglacial period."
https://en.wikipedia.org/wiki/Quaternary_glaciation
I guess I missed the question, and just described 1980 weather like so many others on the thread.
The Pleistocene Epoch is generally considered to have terminated at the end of the Younger Dryas, and the remainder (after the last glacial maximum) is called the Holocene. If you go by Greenland Ice Core Data, the temperature graphs look like this:
Although the term "Ice Age" could be applied to virtually any period of glacial maximima, the Holocene is considered to be after the last "Ice Age". Yes, the planet has been warmer, even in the Holocene, and that well before the appearance of the SUV, internal combustion engine, etc. (at least as far as we know, anyway).
But, you are right, the planet has been considerably warmer in the past. The coupling with CO2 in the atmosphere does not seem to be a close association.
Hence the folks in a dither nowadays tend to concentrate on data like temperatures since 1820 or some such, ignoring or sometimes misconstruing the multiple glacial maxima recorded in data like the Vostok Ice Cores:
Presented with the authors caption:
Figure 1 Temperature and CO2-co-variance in the Vostok ice core [1]. The general picture is one of quite strong-co-variance, but in detail there are some highly significant departures where temperature and CO2 are clearly de-coupled. This is the focus of this post. The grey band is the part of the ice core record examined here. Note that in this chart and all others time is passing from right to left, counter to the normal geological convention, which is a restriction imposed by XL charts that have two primary y-axes. An alternative image showing time passing from left to right is provided in the Appendix at the end of this post.
http://euanmearns.com/the-vostok-ice-core-and-the-14000-year-co2-time-lag/Instead, climate cultists, those inducing panic, focus on the shortest string of data, the last 200 or so years, and make wild predictions of apocalypse.
The long term data is still out there. Not all of what was published has been purged.
