Scientists have found evidence of a “drastic” shift since the 1970s in north Atlantic Ocean currents that usually influence weather in the northern hemisphere, Swiss researchers said on Tuesday.
The team of biochemists and oceanographers from Switzerland, Canada and the United States detected changes in deep sea Atlantic corals that indicated the declining influence of the cold northern Labrador Current.
They said in the US National Academy of Science journal PNAS that the change “since the early 1970s is largely unique in the context of the last approximately 1,800 years,” and raised the prospect of a direct link with global warming.
The Labrador Current interacts with the warmer Gulfstream from the south.
They in turn have a complex interaction with a climate pattern, the North Atlantic Oscillation, which has a dominant impact on weather in Europe and North America.
Scientists have pointed to a disruption or shifts in the oscillation as an explanation for moist or harsh winters in Europe, or severe summer droughts such as in Russia, in recent years.
One of the five scientists, Carsten Schubert, of the Swiss Federal Institute of Acquatic Sciences and Technology (EAWAG), underlined that for nearly 2,000 years the sub polar Labrador current off northern Canada and Newfoundland was the dominant force.
However that pattern appeared to have only been repeated occasionally in recent decades.
“Now the southern current has taken over, it’s really a drastic change,” Schubert told AFP, pointing to the evidence of the shift towards warmer water in the northwest Atlantic.
The research was based on nitrogen isotope signatures in 700 year old coral reefs on the ocean floor, which feed on sinking organic particles.
While water pushed by the Gulfstream is salty and rich in nutrients, the colder Arctic waters carried by the Labrador current contain fewer nutrients.
Changes could be dated because of the natural growth rings seen in corals.
“The researchers suspect there is a direct connection between the changes in oceanic currents in the North Atlantic and global warming caused by human activities,” said EAWAG in a statement.
Trump officials could face criminal charges for USPS sabotage — and the president may not be able to pardon them
Members of the Trump administration could face legal jeopardy over efforts to sabotage U.S. Postal Service operations to interfere with the 2020 presidential elections.
"Rep. Bill Pascrell, Jr. (D-NJ) made a criminal referral to the New Jersey Attorney General on Friday night, asking him to impanel a grand jury to look at possible breach of state election laws by President Trump, Postmaster General Louis DeJoy and others for 'their accelerating arson of the post office,' he said. Alarming headlines have emerged in recent days as many states prepare to facilitate widespread mail balloting due to the coronavirus pandemic. President Trump openly admitted he was withholding federal aid from the postal service to prevent mail-in voting, and USPS has notified 46 states and D.C. that it will struggle to deliver some mail ballots on time," The Daily Beast reported Friday.
Maddow reveals how one state stood up to Trump’s USPS cuts — and won
MSNBC anchor Rachel Maddow's opening segment on Friday focused on a positive story of political pressure stopping one of the Trump administration's attacks on the U.S. Postal Service.
Maddow reported how NBC Montana reporter Maritsa Georgiou had doggedly reported on the removal of postal boxes in Missoula, where she is based. Missoula has been a long-time Democratic Party stronghold.
Montana has a competitive U.S. Senate election in 2020, with Democratic Gov. Steve Bullock challenging first-term Republican Sen. Steve Daines.
As Georgiou chased the story, she learned there were also plans to remove boxes in the battleground of Billings. And more planned for the blue town of Bozeman. And other towns.
Pepsi joins the chorus of people dunking on Tucker Carlson over Kamala Harris
The Pepsi soda company mocked Fox News personality Tucker Carlson on Friday evening.
On Tuesday, Carlson flipped out after a guest attempted to teach him how to pronounce the name of Sen. Kamala Harris (D-CA), who is running for vice president on Joe Biden's ticket.
Video of the exchange was posted on Twitter by Nikki McCann Ramirez, a researcher at the watchdog group Media Matters for America.
Tucker Carlson loses it when a guest corrects his pronunciation of Kamala Harris's name pic.twitter.com/1fHIrPGuwN