WORLD NEWS

Climate change has made heat waves last longer since 1979, according to study

Mar 29, 2024, 6:00 PM

A jet takes flight from Sky Harbor International Airport as the sun sets over downtown Phoenix, Ari...

A jet takes flight from Sky Harbor International Airport as the sun sets over downtown Phoenix, Wednesday, July 12, 2023. (AP Photo/Matt York)

(AP Photo/Matt York)

Climate change is making giant heat waves crawl slower across the globe and they are baking more people for a longer time with higher temperatures over larger areas, a new study finds.

Since 1979, global heat waves are moving 20% more slowly — meaning more people stay hot longer — and they are happening 67% more often, according to a study in Friday’s Science Advances. The study found the highest temperatures in the heat waves are warmer than 40 years ago and the area under a heat dome is larger.

Studies have shown heat waves worsening before, but this one is more comprehensive and concentrates heavily on not just temperature and area, but how long the high heat lasts and how it travels across continents, said study co-authors and climate scientists Wei Zhang of Utah State University and Gabriel Lau of Princeton University.

From 1979 to 1983, global heat waves would last eight days on average, but by 2016 to 2020 that was up to 12 days, the study said.

Eurasia was especially hit harder with longer lasting heat waves, the study said. Heat waves slowed down most in Africa, while North America and Australia saw the biggest increases in overall magnitude, which measures temperature and area, according to the study.

“This paper sends a clear warning that climate change makes heat waves yet more dangerous in more ways than one,” said Lawrence Berkeley National Lab climate scientist Michael Wehner, who wasn’t part of the research.

Just like in an oven, the longer the heat lasts, the more something cooks. In this case it’s people, the co-authors said.

“Those heat waves are traveling slower and so slower so that basically means that … there’s a heat wave sitting there and those heat waves could stay longer in the region,” Zhang said. “And the adverse impacts on our human society would be huge and increasing over the years.”

The team conducted computer simulations showing this change was due to heat-trapping emissions that come from the burning of coal, oil and natural gas. The study found climate change’s fingerprint by simulating a world without greenhouse gas emissions and concluding it could not produce the worsening heat waves observed in the last 45 years.

The study also looks at the changes in weather patterns that propagate heat waves. Atmospheric waves that move weather systems along, such as the jet stream, are weakening, so they are not moving heat waves along as quickly — west to east in most but not all continents, Zhang said.

Several outside scientists praised the big picture way Zhang and colleagues examined heat waves, showing the interaction with weather patterns and their global movement and especially how they are slowing down.

This shows “how heat waves evolve in three dimensions and move regionally and across continents rather than looking at temperatures at individual locations,” said Kathy Jacobs, a University of Arizona climate scientist who wasn’t part of the study.

“One of the most direct consequences of global warming is increasing heat waves,” said Woodwell Climate Research Center scientist Jennifer Francis, who wasn’t part of the study. “These results put a large exclamation point on that fact.”

World News

Palestinians flee from the eastern side of the southern Gaza city of Rafah after the Israeli army o...

Associated Press

Hamas accepts Gaza cease-fire proposal; Israel says it will continue talks but launches strikes

Israel began striking targets in the Gaza town of Rafah hours after Hamas announced it had accepted an Egyptian-Qatari cease-fire proposal.

14 days ago

FILE - Kate, Princess of Wales and Prince William travel in a coach following the coronation ceremo...

Associated Press

Kate and William ‘extremely moved’ by support since the Princess of Wales’ cancer revelation

Kate, the Princess of Wales, and her husband, Prince William, are said to be “extremely moved” by the public’s warmth and support following her shocking cancer announcement

2 months ago

Kate, Princess of Wales, is seen visiting to Sebby's Corner in north London, on Friday, Nov. 24, 20...

Associated Press

Kate, Princess of Wales, says she is undergoing chemotherapy for cancer

Kate, the Princess of Wales, said Friday in a video announcement she has cancer and is undergoing chemotherapy.

2 months ago

Associated Press

Putin extends rule in preordained Russian election after harshest crackdown since Soviet era

President Vladimir Putin sealed his control over Russia for six more years on Monday with a highly orchestrated landslide election win.

2 months ago

President Joe Biden walks towards members of the media before boarding Marine One on the South Lawn...

Associated Press

U.S. military airdrops thousands of meals over Gaza, many more airdrops expected

U.S. military C-130 cargo planes dropped food in pallets over Gaza on Saturday in the opening stage of an emergency humanitarian assistance.

3 months ago

Russian opposition leader Alexei Navalny, who reportedly died in prison on Friday, Feb. 16, 2024, i...

Associated Press

Alexei Navalny, galvanizing opposition leader and Putin’s fiercest foe, died in prison, Russia says

Alexei Navalny, the fiercest foe of Russian President Vladimir Putin, died Friday while incarcerated, the country's prison agency said.

3 months ago

Sponsored Articles

...

Condor Airlines

Condor Airlines can get you smoothly from Phoenix to Frankfurt on new A330-900neo airplane

Adventure Awaits! And there's no better way to experience the vacation of your dreams than traveling with Condor Airlines.

...

Midwestern University

Midwestern University Clinics: transforming health care in the valley

Midwestern University, long a fixture of comprehensive health care education in the West Valley, is also a recognized leader in community health care.

...

Fiesta Bowl Foundation

The 51st annual Vrbo Fiesta Bowl Parade is excitingly upon us

The 51st annual Vrbo Fiesta Bowl Parade presented by Lerner & Rowe is upon us! The attraction honors Arizona and the history of the game.

Climate change has made heat waves last longer since 1979, according to study