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Columbia University
Urban sprawl is reducing June gloom in coastal Southern California
Urban sprawl is reducing June gloom in coastal Southern California

In a meteorological twist, heat rising off urban sprawl is driving a trend toward fewer annual summer invasions of dense overcast known as June gloom in coastal Southern California areas, a new climate study says. The study led by bioclimatologist A. Park Williams of the Lamont-Doherty Earth Observatory at Columbia University shows, for example, that the Los Angeles Basin has seen a 63% reduction in the frequency of fog and low clouds during summer months since 1948. Then there’s the city of Ontario, about 40 miles east of Los Angeles, “where we noted an 87% decline in fog,” Williams said in an interview. “Dense fog just doesn’t happen there anymore.”...

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