Good overview and background here: https://www.carbonbrief.org/jet-stream-is-climate-change-causing-more-blocking-weather-events/ https://www.carbonbrief.org/j

Good overview and background here: https://www.carbonbrief.org/jet-stream-is-climate-change-causing-more-blocking-weather-events/ https://www.carbonbrief.org/jet-stream-is-climate-change-cau... Seems like an active area of research, as climate models don't capture these large-scale blocking events well. They're not a new phenomenon brought on by warming, but their scale and intensity might increase due to increased moisture in the atmosphere and Arctic amplification. A warming Arctic means a lower summertime temperature differential between polar and mid-latitude zones and hence a weaker jet stream more likely to meander about, which leads to these blocking events.