Now the question is how much of a role climate change plays in these extreme blocks, since they seem to be migrating to different parts of the globe. In 2014-15 we also had extreme blocking but it was in the North Pacific (if I remember correctly?) and if climate change plays a role in the extremity of these blocks will their return rate increase? Has it been already? 2017-18 was another example of extreme blocking, but much later in the season.