Last July 19th it was the hottest day ever recorded in the UK, in which temperatures exceeded 40 degrees Celsius. With extreme heatwaves raging across Europe and the United States where weather warnings have been issued in many areas. Recent research confirms that the underlying causes of these climate anomalies depend on climate change and Greenhouse gas emissions of anthropogenic origin. The latest work supporting this theory was conducted by scientists from the Southern Marine Science and Engineering Guangdong Laboratory and the South China Sea Institute of Oceanology at the Chinese Academy of Sciences (CAS).
In an article published in Advances in atmospheric sciencesthe researchers, led by Chunzai Wanghave come up with one Atmospheric circulation model considering the possibility that anthropogenic greenhouse gas emissions may have played a key role in the higher temperatures. The team studied the physical processes of internal variability and assessed how airflow and temperature can affect surface temperatures. The heat around the planet, experts explain, depends on a combination of factors related to the heating of the sun, the internal variability of the atmosphere and the rotation of the earth. According to what emerges from the models of the research group, the special meteorological conditions of this summer could be experienced in England normal for the island for the next several decades.
The shading represents surface air temperature anomalies and the green vector shows the jet stream (a narrow band of very strong westerly air currents near the tropopause level). Two blue vectors indicate that the heatwave is related to anomalous circulations in the North Pacific and Arctic.
Credit: Jiayu Zheng
Scientists have found that greenhouse gases were the main reason for rising temperatures in the past. The authors speculate that the climate-changing substances will continue to represent the Main reason tied to the waves of extreme heat. Scientists have estimated that the frequency of extreme events could increase by more than 30 percent in the coming years, and that more than two-thirds of the variability depends on greenhouse gas emissions. “Late June last year – he’s watching Chunzai Wang, by CAS – An unprecedented heatwave has struck western North America, causing hundreds of human deaths, fires and devastation to marine ecosystems. The team considered observational data and climate models they were able to identify three models of atmospheric circulation that occurred simultaneously during the 2021 heatwave: the North Pacific model, the Arctic-Pacific model, and the North American model. “The North Pacific model and the Canadian model – reports Wang – occurred in conjunction with the development and subsequent phases of the heat waves, while the North American pattern coincided with the breakup and eastward movements. This suggests that the heatwave originated in the North Pacific and Arctic, while the North American model exacerbated the heatwave.” circulation, leading to more frequent extreme heat events. If proper measures are not taken, the risk of high-temperature waves will tend to increase, with further impacts on ecological balance and sustainable social and economic development.
Valentina DiPaola
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