The record-breaking heatwaves that have swept across Southern Europe and North America this July would have been virtually impossible without human-induced global warming, a new study has found.
The research, conducted by the World Weather Attribution (WWA) consortium of scientists, used peer-reviewed methods to analyze the role of climate change in the extreme weather events.
The study found that the blistering temperatures currently being experienced around the world are not just hotter but also more frequent, thanks to human activity that has raised the Earth's temperature by about 1.2 degrees Celsius above pre-industrial levels.
According to the researchers, if the global average temperature rises to 2 degrees Celsius above pre-industrial levels, as agreed upon in the Paris climate agreement, such heatwaves will occur even more frequently, happening every two to five years in North America and every 15 to 20 years in Europe.
The scientists also found that the heatwaves in mid-July can now be expected once a decade in Southern Europe and every 15 years in North America.
However, if the global average temperature rises to 2.4 degrees Celsius by the end of the century, as currently projected, such heatwaves will become even more frequent.
China, which registered a new temperature record of 52.2 degrees Celsius in mid-July, is already experiencing such heatwaves every five years, according to the WWA study.
The study also found that the Chinese heatwave was made 50 times more likely by climate change.
The impact of climate change is not just limited to extreme heatwaves.
It is also causing more intense and frequent heatwaves, according to the study.
The European heatwave was 2.5 degrees Celsius hotter than it would have been without climate change, while the North American heatwave was 2 degrees Celsius hotter, and the Chinese heatwave was 1 degree Celsius hotter.
The intense heat has caused significant harm to human health.
The study found that more than 60,000 Europeans died in the heatwaves of the last summer, and doctors in the southwestern A study has found a clear link between climate change and the recent heatwaves experienced in the Northern Hemisphere.
The study's lead author, Gavin Schmidt, said that the arrival of El Niño, the warming cycle of a naturally occurring phenomenon in the Pacific Ocean, contributed very little to the high temperatures.
Schmidt emphasized that increased global temperatures from burning fossil fuels is the main reason for the severity of the heatwaves.
The EU's Copernicus climate change service said that a mix of global warming and "unusual" atmospheric circulation is driving the anomaly in the North Atlantic, while scientists also point to a reduction in shipping pollution and an absence of Saharan dust over the Atlantic as contributing factors.
However, the focus of the study was on the link between climate change and the heatwaves, and Schmidt said that the study found "a very robust result indeed" that the Earth is getting hotter and that the heatwaves are a direct result of climate change.
The study also highlights the urgent need for action to reduce emissions to avoid disastrous climate change and to enact measures to adapt to rising temperatures.
The authors stressed that even if fossil fuel burning stops today, temperatures will not go down, but will just stop getting even higher.
Meanwhile, Antarctica's sea ice is in sharp decline, setting new records at such a pace that scientists are increasingly fearing for its capacity to recover in the winter.
Oceanographer Edward Doddridge told the Australian Broadcasting Corporation that the unprecedentedly low sea ice extent is a five-sigma event, meaning that it is five standard deviations beyond the mean.
Doddridge added that the root cause of the decline is likely to be climate change, although other factors cannot yet be ruled out.
The rapid melting of Antarctic ice is also slowing deep ocean currents, with potentially devastating consequences for ecosystems and the broader climate.
A study earlier this year found that the loss of ice at the poles is causing the planet to absorb more heat, further accelerating climate change.
In conclusion, the study highlights the urgent need for action to address the impacts of climate change, including reducing emissions and adapting to rising temperatures.
The evidence is clear,
LONDON DAILY ARCHIVE
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