Will travellers to Antarctica soon be packing bathing suits? It may seem far-fetched, but on Tuesday the planet’s temperature spiked to its hottest day in at least 44 years – and likely much longer – and Wednesday was set to be the third straight day Earth unofficially marked a record-breaking high.
The globe’s average temperature reached 17.18 degrees Celsius (62.9 degrees Fahrenheit) on Tuesday, according to the University of Maine’s Climate Reanalyzer, a common tool based on satellite data and computer simulations and used by climate scientists for a glimpse of the world’s condition. On Monday, the average temperature was 17.01 degrees Celsius, breaking a record that lasted only 24 hours.
While it is not an official National Oceanic and Atmospheric Administration record, “this is showing us an indication of where we are right now,” NOAA chief scientist Sarah Kapnick said. Even though the dataset used for the unofficial record goes back only to 1979, she said that given other data, it’s likely the hottest day in “several hundred years that we’ve experienced.”
The previous hottest day was in August 2021, Kapnick said.
“A record like this is another piece of evidence for the now massively supported proposition that global warming is pushing us into a hotter future,” said Stanford University climate scientist Chris Field, who was not part of the calculations.
With many places seeing temperatures near 37.8 degrees Celsius (100 degrees Fahrenheit), the new average temperatures might not seem very hot. But Tuesday’s global high was nearly a full degree Celsius higher than the 1979-2000 average, which already tops the 20th- and 19th-century averages.
High-temperature records were surpassed this week in Quebec and Peru. Beijing reported nine straight days last week when the temperature exceeded 35 degrees Celsius.
In Canada, some parts of the country are baking under high heat with Environment Canada issuing heat warnings and special weather statements warning of high temperatures in two territories and four provinces, including Ontario, where last week Toronto posted the dubious honour of the world’s worst air quality due to smoke from Quebec wildfires – also blamed on climate change.
Higher temperatures translate into brutal conditions for people all over the world. When the heat spikes, humans suffer health effects — especially young and elderly people, who are vulnerable to heat even under normal conditions.
“People aren’t used to that. Their bodies aren’t used to that,” said Erinanne Saffell, Arizona’s state climatologist and an expert in extreme weather and climate events. “That’s important to understand who might be at risk, making sure people are hydrated, they’re staying cool, and they’re not exerting themselves outside, and taking care of those folks around you who might be at risk.”
The highs come after months of “truly unreal meteorology and climate stats for the year,” such as off-the-chart record warmth in the North Atlantic, record low sea ice in Antarctica and a rapidly strengthening El Nino, said University of Oklahoma meteorology professor Jason Furtado.
Scientists generally use much longer measurements – months, years, decades – to track the Earth’s warming. But the new figures are an indication that climate change is reaching uncharted territory, even if the data aren’t quite the type used by gold-standard climate measurement entities such as the National Oceanic and Atmospheric Association.
The figures legitimately capture global-scale heating, and NOAA will take them into consideration for its official record calculations, said Deke Arndt, director of the National Center for Environmental Information, a division of NOAA.
Wednesday was primed to bring another unofficial record, with the Climate Reanalyzer again forecasting record or near-record heat. Antarctica’s average forecast for Wednesday was a whopping 4.5 degrees Celsius warmer than the 1979-2000 average.