#blockingStefan Rahmstorf
https://twitter.com/rahmstorf/status/1417574780312694784?s=19 Washington Post weather expert Jason Samenow: "Lined up like a parade, the heat domes are also part of a traffic jam of weather systems that instigated the flood disaster in Europe last week." Planetary waves!
The Northern Hemisphere has a punishing heat wave infestation
https://www.washingtonpost.com/weather/2021/07/20/heat-wave-northern-hemisphere/
no fewer than five powerful heat domes are swelling over the landmasses of the Northern Hemisphere. These zones of high pressure in the atmosphere, intensified by climate change, are generating unforgiving blasts of heat in North America, Europe and Asia simultaneously.
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The heat domes, in a number of instances, are the source of record high temperatures and are contributing to swarms of wildfires in western North America and in Siberia. In recent days, all-time record highs have been set in Turkey, northern Japan and Northern Ireland.
Lined up like a parade, the heat domes are also part of a traffic jam of weather systems that instigated the flood disaster in Europe last week.
Heat domes like this are normal at this time of year, the hottest point of summer, but it’s unusual to have this many this intense. Every one of these heat domes is generating exceptional weather.
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Scientists have determined that climate change is increasing the intensity of heat domes and making heat waves hotter than they would have been without human influence. This explains the frequency at which temperature records are being set every summer
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Climate change is expected to decrease the strength of steering currents as the high latitudes warm more quickly than the mid-latitudes, reducing the north-to-south temperature differences that drive the wind. According to a 2018 study from climate scientist Michael Mann of Pennsylvania State University, weaker high altitude winds will produce a slower jet stream with more wavy peaks and troughs, which he ascribes to a process known as “quasi-resonant amplification
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The more wavy peaks are the breeding grounds for intensified heat domes, like we see spread around the Northern Hemisphere, while the troughs are the low-pressure zones that can set the stage for floods like we just saw in Germany and neighboring countries.
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