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July 23, 2012

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City will enjoy more sunny days, clean air

SHANGHAI will continue to breathe good air for about three days due to a subtropical high, with a maximum temperature of around 34 degrees Celsius.

The city showed a rare blue sky and white clouds over the weekend that many residents said reminded them of the World Expo 2010, when city government curtailed pollution from traffic and local factories.

"The subtropical high controlling the city brought strong southeast wind that blew fresh air from the sea to the city," Lin Chenyuan, chief forecaster of Shanghai Environmental Monitoring Center, said yesterday.

Many suspected the rainstorm that lashed large swathes of northern and southwestern China helped clear Shanghai's air but expert said the storms had no direct connection.

"The city's air quality will be impacted by the north only in winter," said Wang Qian, an expert with the center.

The average density of PM2.5 - particles measuring 2.5 microns or less in diameter - was below 20 micrograms per cubic meter yesterday, in the range of "good" air quality, according to the center's website. China's national standard is 75 micrograms per cubic meter.

The monitoring spot in Yangpu District reported the highest PM2.5 density yesterday afternoon, 22, which is still "good" according to Chinese standards. Zhangjiang in the Pudong New Area had the best air quality with PM2.5 density at only 8.9.

The city's sunny days should last for a week, with the maximum temperature stable at around 34 degrees Celsius, according to the Shanghai Meteorological Bureau.

There should also be some southeasterly winds from the sea, said Zhang Ruiyi, a chief service officer of the bureau.

"It's the typical midsummer weather of Shanghai," Zhang told Shanghai Daily. "The city is at the southwest of the subtropical high and the weather conditions should be stable these days. The high should be around 34. If the subtropical high gets stronger the high should climb to 35 and if the southeastern winds get stronger, the city should stay cooler with the high around 34."

Zhang reminded locals to take measures to avoid getting sunburned.

"The ultraviolet radiation is extremely high due to the clean air and sufficient sunshine," Zhang explained.


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