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Tag: triggered

Study: Ice ages triggered by tectonic collisions in the tropics

Study: Ice ages triggered by tectonic collisions in the tropics

Science
April 12 (UPI) -- Earth's ice ages were born in the tropics. According to a new study, the planet's periodic cooling is caused by collisions between continental land masses and volcanic arcs in the tropics. These collision uplift rocks that absorb CO2, and as carbon dioxide is pulled from the atmosphere, temperatures drop. The theory isn't entirely new. Scientists have been studying the link between tectonic activity and global cooling for several years. In 2017, researchers at the University of California, Santa Barbara proposed that Appalachian mountain-building on the East Coast, some 445 millions years ago, triggered a succession of weathering reactions that pulled CO2 from the air. At the time, the East Coast was located in the tropics. For the latest study, published this week in ...
Ancient comet impact triggered fires, climate change, megafauna extinctions

Ancient comet impact triggered fires, climate change, megafauna extinctions

Science
March 13 (UPI) -- Scientists have uncovered new evidence that a cosmic impact sparked wildfires and triggered a period of global climate change at the end of the Pleistocene epoch some 13,000 years ago. Previously, researchers had only found evidence of the period of climatic change known as the Younger Dryas, or YDB, in the Northern Hemisphere. New findings, however, suggest the Southern Hemisphere also experienced a sudden climatic shift -- and much more. "We have identified the YDB layer at high latitudes in the Southern Hemisphere at near 41 degrees south, close to the tip of South America," James Kennett, geology professor emeritus at the University of California, Santa Barbara, said in a news release. Kennett is a proponent of the Younger Dryas Boundary Impact Hypothesis, which pos...
BHS demise triggered £1bn in creditor claims

BHS demise triggered £1bn in creditor claims

Business
Unsecured creditors of BHS, the retailer once owned by Sir Philip Green‎, lodged claims worth almost £1bn in the aftermath of its collapse, according to a report compiled by the chain's liquidators.Sky News has obtained a document sent to creditors late last week which discloses that a 3.6pm interim dividend - worth a total of roughly £36m - has been paid out by FRP Advisory, which is overseeing the winding-down of what was once one of Britain's best-known high street brands.BHS collapsed into administration in April 2016, little more than a year after being offloaded for £1 by Sir Philip Green, the high street billionaire.Sir Philip endured months of public and political criticism before agreeing to pay up to £363m into BHS's pension scheme, while as many as 11,000 workers lost their jobs