Bit of jet stream ‘pumping hot air northwards’

BBC 17th July 2022

Europe heatwave: Extreme temperatures grip region - BBC Weather


How is the jet stream connected to simultaneous heatwaves across the globe?

Scientists are racing to understand the changing shape of the air currents

“The jet stream is like a conveyor belt, delivering storms to us one after the other.” It can also generate heatwaves when it forms into a U-bend shape, called an “omega block” because it resembles the shape of the Greek letter omega.

Right now, a global pattern of five big waves is circling the world, leading to simultaneous heatwaves across continents. This pattern, known as wavenumber 5, can persist for weeks, causing hot areas to stay hot for a long time.

Leslie Hook FT 21 July 2022

https://www.ft.com/content/bb9ecca3-c914-489d-af7d-06df6010d1ea


Leslie Hook reports from ​London on carbon, the environment and the renewable energy transition worldwide. ​Her previous roles at the FT include San​ ​Francisco correspondent, Lex writer and Beijing correspondent. Prior to that she was at the Wall Street Journal.


The current scorching temperatures 

were caused in part by a region of upper level low-pressure air that has been stalled off the coast of Portugal for days. 

It’s known as a “cutoff low” in the parlance of atmospheric scientists, because it was cut off from a river of westerly winds, the mid-latitude jet stream, that circles the planet at high altitudes.

New York Times 18 July 2022

https://www.nytimes.com/2022/07/18/climate/europe-heat-wave-science.html


Europe’s String of Extreme Heat Waves Linked to Jet Stream

https://englundmacro.blogspot.com/2022/07/europes-string-of-extreme-heat-waves.html




The climate system could be less stable than forecast: there may be tipping points

Corinne Le Quéré, one of the world’s experts on global emissions. ‘Could we just adapt to climate change? The answer is no’

Now is not the time to be fearful, now is the time to be forceful and say: we know what to do. 

FT 18 July 2022





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