Descriptions:
This heatwave across much of the northern hemisphere could continue for weeks, and possibly even months. And accelerated warming in the Arctic compared to the rest of the planet could be a key contributor. https://www.newscientist.com/article/2174889-warming-arctic-could-be-behind-heatwave-sweeping-northern-hemisphere/
Jennifer Francis (Rutgers University), speaks March 2018 about weather changes. And how are those related to climate change? Full talk https://www.youtube.com/watch?v=U2FxJelkAtI
Kai Kornhuber (Climate Analytics) 2016, explains Rossby waves, full release https://www.youtube.com/watch?v=MzW5Isbv2A0
Jet stream https://en.wikipedia.org/wiki/Jet_stream
Rossby wave https://en.wikipedia.org/wiki/Rossby_wave
Q&A: How is Arctic warming linked to the ‘polar vortex’ and other extreme weather? https://www.carbonbrief.org/qa-how-is-arctic-warming-linked-to-polar-vortext-other-extreme-weather