Big Rounding Top - Arctic Mean Temperature - BOB HOYE July 31, 2017

Having taken out the last low, the chart is rolling over.
Support at 273K can’t hold.
Strong seasonal tendencies.
Target is the 244K low set with the 2016 El Nino. Support won’t hold.
On the longer term, the rebound (Modern Warm Period) out of the Little Ice Age has likely maxed out.
In which case, the very long-term downtrend from the Minoan, Roman and Medieval Warm Periods will prevail. Recent warming is approaching resistance.

Source: Danish Meteorological Institute, Daily Mean Temperatures North of 80 Degree North