Researchers find that human activities increase the chance of more intense heat waves. The 19th of July was the hottest day ever recorded in the United Kingdom, with temperatures exceeding 40 degrees Celsius (about 104 degrees Fahrenheit). The heat wave is a preview of the typical summer weather th
The scientists believe that greenhouse gases are primarily responsible for the increased temperatures.The 19th of July was the hottest day ever recorded in the United Kingdom, with temperatures exceeding 40 degrees. The heat wave is a preview of the typical summer weather that British citizens can expect in 2050, according to climate forecasters. The heat continues in Europe and the United States today, with more than a third of the nation subject to extreme temperatures.
Shading represents surface air temperature anomalies, and the green vector denotes jetstream . Two blue vectors indicate that the heatwave is related to anomalous circulations in the North Pacific and the Arctic. Credit: Jiayu Zheng Atmospheric circulation patterns describe how air flows and impacts surface air temperatures across the world, both of which may fluctuate due to natural warming from the Sun, atmospheric internal variability, and the rotation of the Earth. These configurations are responsible for both everyday weather and the long-term trends that comprise climate.
However, atmospheric circulation patterns could co-occur – and have in the past – without causing an extreme heat wave, so how much of the 2021 event was influenced by human activity? Wang and his colleagues employed the World Climate Research Programme’s internationally curated, tested, and assessed models, particularly the Detection Attribution Model Comparison models of the Coupled Model Intercomparison Project Phase 6 .
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