This might be of interest to those in this thread (and not bode well for those looking for summer) - regarding increased Northern Blocking in summer, with a tendency to centre towards Greenland, which means cooler and unsettled conditions for us (potentially Northern Blocking can bring great summer weather as we saw the other week, but placement is key).
A recent clustering of high Greenland Blocking Index values is evident in summer, when 7 of the top 11 values in the last 165 years – including the two latest years 2014 and 2015 – occurred since 2007.
Also perhaps relevant for Scottish Snowsports, there being something of a tendency to all or nothing Decembers in recent years.
Moreover, since 1851 there have been significant increases in GBI variability in May and especially December. December has also shown a significant clustering of extreme high and low GBI values since 2001, mirroring a similar, recently identified phenomenon in the December North Atlantic Oscillation index, suggesting a related driving mechanism. We discuss changes in hemispheric circulation that are associated with high compared with low GBI conditions. Our GBI time series should be useful for climatologists and other scientists interested in aspects and impacts of Arctic variability and change.
Edited 1 times. Last edit at 20.12hrs Wed 18 May 16 by alan.