Kenneth Richard recently wrote how a wealth of new research in glacier and sea ice extent show modern Iceland is 2-4°C colder than all of the last 8000 years.
Only the late 19th century was slightly colder.
First, South America going back 100 years, which shows it was much warmer from the 1930s to the 1950s than it is today:
Andes South America
Reconstructed variability in 'DaysT4 °C' showing 5-year filtered
data (black line)
Source (page 32)
Next we have a temperature reconstruction from the Canadian Arctic going back 7000 years:
0 = Present - 7 = 7000 years ago
Note, as many of us have already known, the Arctic was indeed much warmer earlier in the Holocene than it is today.
Finally we look at the Swiss Alps going back 9000 years:
0 = Preset - 9000 = 900 years ago
Here we see that the Alps are very cold today compared to the early Holocene. This has also been confirmed by old tree trunks found under glaciers.
The reader at WUWT added he has,
And indeed there are many...!
Medieval Warm Period confirmed by hundreds of papers
Dr. Sebastian Lüning's admirable and outstanding reference Medieval Warm Period Map here shows hundreds climate reconstructions for that period.
There we find an abundant number of studies showing today's climate is nothing unusual compared to 1000 years ago.