Ice core records do not have the required resolution to determine the variability! That is a form of smoothing because of the state of resolution. By the way what is the resolution for that data and what smoothing was used to produce the graphs? Was it 1 year? 1 decade? 1 century? A thousand years? Or longer? Yet you want to compare Ice core records with recent history of 20 to 50 years.
You might think that because I use Ice Core records also that I present a contradiction. I use Ice core records to show the over all pattern of climate based on long term records and do not claim the recent history is proof of anything because there is no short term proof for either side of the argument because historical records show we are in a cooling phase by observing the ice core records. As well as records with a little finer resolution but still contain the last 10 thousand years and even the reliable records of the last 1 thousand years show a continuing cooling but 5 thousand is a better representation of climate trends and 800 thousand is a better representation of long term climate cycles.
"SO?"
We are talking about regional versus global climate reconstructions.
Actually Dixie or any other musical composition requires a variable scale of frequencies just like weather and climate! Other wise it would be a flat and monotonous just like your position on climate! Low and repetitious rising to a wailing shriek at the end.