Agree. Hence the 1500 graph. Continuation of that cooling trend would have normally triggered the next glacial inception.
Agree that the descent is indeed inevitable. But the projections are that, at this point, the current interglacial period will persist for another 100,0oo years.
With 800K of ice core data on the hard drive its hard not to play with it. I segmented the observational data from the Antarctic (65S-90S zonal) with the core data and selected the last six interglacial peaks (A-F in linked image) to expand and look at more closely. The ~20,000 year period since the termination of the last ice age (peak F) is expanded in the linked figure.
https://s10.postimg.org/7jpth49mx/ice_core.jpg
This allowed me to calculate linear slopes for 27 different warming episodes, including the latest warming event beginning (for the Antarctic measurement data) starting about 1930. This group of rates clustered (remarkably tightly actually) as a normal distribution, but with one extreme (>5 std. devs.) outlier. I imagine you can guess which warming period the outlier is. Thus, the current rate of warming being measured in the Antarctic today does not match, statistically, the rate of warming that occurred as we moved out of the last ice age 20,000 years ago or for other warming events associated with 5 other interglacial periods over the last 400,000 years. This suggests there is something different about it.
I'm sure we won't agree on this but its been fun. If you've been willing to look at the data for yourself that's great.
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