A historic heat wave has toppled numerous long-standing temperature records with astonishing ease.
The heat wave, caused by a massive area of high pressure extending into the upper atmosphere, also known as a heat dome, is set to envelop Scandinavia in the next two days, before making a run at the Arctic. This could dramatically speed up the melting of the Greenland Ice Sheet and enhance the loss of already record-low sea ice.
Scientific studies show that heat waves are becoming more common, severe and longer-lasting as global temperatures warm in response to human activities, including in Europe. They are also now more likely to occur.
On Thursday, new national heat records were set in Germany, the Netherlands and Belgium. Both Paris and London broke records Thursday, as well. In the Netherlands, Thursday marked the first time that temperatures had exceeded 104 degrees (40 Celsius).
According to Meteo-France, Paris set a new all-time high temperature record of 108.7 degrees (42.6 Celsius) Thursday, shattering the previous record of 104.7 Fahrenheit (40.4 Celsius), set in 1947. As in the case of London and much of the rest of Western Europe, most Parisians lack air conditioning, which heightens the health threat posed by such an intense heat wave.
In Lille, located in northern France, the temperature reached 105.8 degrees (41 Celsius) Thursday, beating the previous all-time record high for that city by 5.4 degrees (3 Celsius). It’s extremely unusual to break monthly and all-time temperature records by such a large margin, which attests to the intensity of the ongoing heat event.
It’s even more difficult to beat all-time heat records in mid-July, considering this is the hottest time of year.
In Britain, Cambridge reached 100.6 degrees (38.1 Celsius), which the Met Office says is only the second time that temperatures above 100 degrees have been recorded in the country.
In Scotland, Edinburgh recorded its hottest temperature on record, reaching 88 degrees (31.2 Celsius).
In Germany, a record of 107 degrees (41.7 Celsius) was set Thursday, which beat the old record — which was set just the day before.
The high temperature in London was 98.2 degrees (36.9 Celsius), which set a national record for the hottest temperature recorded in July, the Met Office reported, noting that temperatures were still increasing and that the country’s record could be toppled before the end of the day.
July in Paris has warmed ~2°C the last 50 years. *Weather* records are largely driven by internal climate variability. However, think of it as the 100 meter dash. If you incrementally increase my head start, eventually I'm going to beat Usain Bolt. pic.twitter.com/CGsmp9XAN0— Rob Elvington WAAY 31 (@RobElvington) July 25, 2019
In Belgium, the temperature hit 103.8 degrees Wednesday, the hottest since records began to be kept in 1833.
As The Washington Post reports from Europe: “Punishing heat — in historic cities largely without widespread air conditioning, especially in homes — has become Europe’s new normal.”
“We are in a situation where people cannot live,” said Sacha Gaillard, a technician with Les Bons Artisans, a French company that, among other things, installs air conditioners. Gaillard noted that the company’s air conditioning business across France has increased exponentially in the past five years. “[People] can’t sleep at their apartments. Air conditioning is no longer a comfort. It’s a necessity. It’s as if people had no heat in winter,” Gaillard said.
The heat dome is headed north, way north
The intense area of high pressure, also referred to as a blocking high because it reroutes storms like a detour in the atmosphere, is forecast to migrate northward by the weekend, parking itself over Scandinavia. Sweden, Norway and Finland are likely to set heat records through the weekend as a result, and then it’s possible that this weather feature will become an unusual warm event across much of the Arctic Ocean and Greenland.
The consequences of this would-be sped-up ice melt in Greenland as well as the Arctic Ocean. It’s possible that it would increase the likelihood that this year will feature a record low in sea ice extent at the end of the melt season in September. Already, ice extent is running at a record low, as Arctic-wide temperatures have reached record highs from May through June.
And in Greenland, the ice sheet has lost 160 billion tons of ice through surface melting in July, according to Ruth Mottram of the Danish Meteorological Institute. That’s enough water to fill about 64 million Olympic-size swimming pools, she said in a tweet from the World Meteorological Organization. The melt season got off to an unusually early start, but it has not beaten the extent or severity of the melt seen in 2012.
James McAuley in Paris contributed to this report.