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Gregory Bull / AP

Bloomberg reports that a slowing jet stream might be causing longer-lasting storms and heat waves, according to a study published in Nature this year. Study author Michael Mann, an atmospheric scientist at Pennsylvania State University, told Bloomberg that sometimes currents in the upper atmosphere go through a stationary phase that may be linked to longer-lasting weather disasters and "appears to be favored by human-caused climate change."

What they did: The scientists analyzed a number of extreme weather events, including Russia's 2010 heatwave, flooding in Pakistan in 2010, and the recent droughts in Texas and California. They found the jet stream stabilized during some of those cases, possibly holding the weather patterns in place.

A link to Harvey? On Monday, Mann published an essay detailing different ways climate change may have had an impact on Harvey. Although he mentioned jet stream stalling as a potential factor contributing to Harvey's persistence, he described the link as "tenuous."

The remaining question is whether the disruptions in the jet stream are caused by Arctic warming, which is occurring at twice the global average and could create opportunities for more persistent weather farther south. Even then, there is debate over whether there is a link between jet stream sluggishness and major storms at all. "It's still controversial," David Sobel, an earth scientist at Columbia University tells Bloomberg.

Go deeper

Updated 48 mins ago - Axios Twin Cities

In photos: Thousands rally for George Floyd ahead of Derek Chauvin's trial

Demonstrators on March 7 outside the Hennepin County Government Center, where the trial of former Minneapolis police officer Derek Chauvin, charged with murdering George Floyd, will begin in Minneapolis, Minnesota. Photo: Chandan Khanna/AFP via Getty Images

Thousands of protesters marched through Minneapolis' streets Sunday, urging justice for George Floyd on the eve of the start of former police officer Derek Chauvin's trial over the 46-year-old's death, per AFP.

The big picture: Chauvin faces charges for second-degree murder and manslaughter over Floyd's death last May, which ignited massive nationwide and global protests against racism and for police reform. His trial is due to start Monday, with jury selection procedures.

Caitlin Owens, author of Vitals
5 hours ago - Health

Pfizer CEO feels "liberated" after taking COVID vaccine

Pfizer CEO Albert Bourla. Photo: "Axios on HBO"

Pfizer CEO Albert Bourla tells "Axios on HBO" that he recently received his first of two doses of the company's coronavirus vaccine.

Why it matters: Bourla told CNBC in December that company polling found that one of the most effective ways to increase confidence in the vaccine was to have the CEO take it.

Dan Primack, author of Pro Rata
5 hours ago - Economy & Business

Ripple CEO: SEC lawsuit is "bad for crypto" in the U.S.

Ripple CEO Brad Garlinghouse tells "Axios on HBO" that if his company loses a lawsuit brought by U.S. regulators, it would put the country at a competitive disadvantage when it comes to cryptocurrencies.

Between the lines: The SEC in December sued Ripple, and Garlinghouse personally, for allegedly selling over $1.3 billion in unregistered securities. Ripple's response is that its cryptocurrency, called XRP, didn't require registration because it's an asset rather than a security.

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