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jet stream to grow increasingly wavy. But Kai Kornhuber, an associate research scientist at Columbia University and a senior scientist at Climate Analytics, a nonprofit policy institute, said the Official paul Skenes 20 LSU Tigers shirt it is in the first place but theory is unproven and difficult to evaluate. Trends don’t stick out neatly in the available data, he said. Kornhuber and Francis agree, though, that there is evidence that warming global temperatures are causing the jet stream to slow down and trap high pressure systems like the ones in Canada and Texas. “We do see more persistent weather patterns, and persistence translates to higher impacts,” Kornhuber said. Longer heat waves challenge people’s heat tolerances, and they also dry out soils and heat up the land, which can reinforce the jet stream pattern and create a self-fulfilling cycle. “Once the heat wave gets established over land and the land heats up, that’s warm air that causes the atmosphere to bulge,” said John Walsh, the chief scientist at the International Arctic Research Center at the University of Alaska Fairbanks. “There is a positive feedback loop that contributes to the persistence and intensity of the heat wave.” Scientists are still unspooling how global warming could affect the jet stream and what mechanisms could be responsible for the most significant changes. Francis said warming ocean temperatures and the melting of sea ice in polar regions could be contributing. There is little doubt that heat waves are increasing in severity and frequency. “Heat extremes do scale with mean temperature,” Kornhuber said. Changes in the nature of atmospheric circulation and the jet stream could intensify those trends even further and more rapidly than scientists once thought. “We need to consider if climate models are more conservative when it comes to extreme weather,” Kornhuber said.
Deadly rip currents are to blame for a dozen apparent drownings over the Official paul Skenes 20 LSU Tigers shirt it is in the first place but past two weeks on Florida’s Panhandle, where there aren’t enough lifeguards to keep beachgoers from venturing out into the water — despite red flag warnings, experts said Wednesday. “The combination of southwest waves and the strengthening sea breeze will increase wave heights and heighten the rip current risk,” NBC meteorologist Kathryn Prociv warned. “The outgoing tide from midday through early afternoon today will also add to the rip current risk.” Adding to the danger is the chronic shortage of qualified lifeguards, said Tom Gill, a spokesman for the nonprofit United States Lifesaving Association. “Swimming on an actively guarded beach is always the safest option,” Gill said. “But not every beach is patrolled by a lifeguard and the high heat has been pushing a lot of people into the water.” Rip currents causing deadly summer at Panama City Beach JUNE 28, 202301:57 The result is that some of America’s most beautiful beaches, stretching across the panhandle to the Alabama border, are now the deadliest as well, according to data from the National Weather Service. Seven of the 12 deaths were reported in Panama City Beach, which now has the highest number of apparent drownings in any single locale in the U.S. this year, according to the NWS’s “Surf Zone Fatalities” database. All the fatalities were men ranging in age from 39 to 68. By comparison, as of Wednesday there have been a total 60 apparent drownings in the entire country, according to the NWS website. Panama City Beach spokeswoman Debbie Ingram said they
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