Arctic Melt [Derived Headline]

Tribune-Review/Pittsburgh Tribune-Review, September 24, 2017 | Go to article overview

Arctic Melt [Derived Headline]


Arctic melt

The Arctic ice cap reached its eighth-lowest extent on record at the time of year the sea ice is typically at its minimum coverage.

Scientists at the U.S. National Snow and Ice Data Center (NSIDC) said that the sea ice had set a record for the smallest winter extent earlier this year and was on track to rival the record minimum set in 2012.

But a cloudy and cooler-than-normal August across the central Arctic slowed the seasonal melting.

“The Arctic will continue to evolve towards less ice,” said Ted Scambos of the NSIDC. “There’s no dodging that.”

Maritime lightning

New research suggests that ships at sea spewing soot from their diesel engines are responsible for an increase in lightning strikes along busy maritime routes.

By studying records of lightning strikes between 2005 and 2016 as detected by the World Wide Lightning Location Network, researcher Joel Thornton and colleagues at the University of Washington in Seattle uncovered the link between ship exhaust and lightning.

They found that there were twice as many lightning strikes along two of the world’s busiest shipping lanes as in nearby areas.

They believe that aerosols from engine exhaust helped water vapor to condense into cloud droplets, which can build into localized thunderstorms with more lightning.

Earthquakes

A magnitude 7.1 temblor killed hundreds as it collapsed buildings around Mexico City.

• Quakes were also felt in Jamaica, Papua New Guinea, northeastern Japan, the Yukon-British Columbia-Alaska border region and Los Angeles.

Bali rumblings

Indonesian officials on the resort island of Bali raised the alert level for a restive volcano twice within a week. …

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