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January 21, 2014

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Home » Metro » Environment

City struggles with chilly mornings, heavy pollution

POLLUTANT-HEAVY colder air from the north kept Shanghai under moderately to heavily polluted for the third day.

The density of dangerous PM2.5 particles hit 287.4 micrograms per cubic meter at 11am, nearly 4 times the nation’s limit of 75, while PM10 concentration peaked at 361.1 micrograms per cubic meter — double the nation’s guideline of 150.

The city’s AQI stayed above 200 from 10am, indicating a heavily polluted air quality level. The Shanghai Environmental Monitoring Center attributed the poor air to the diffusion of cold air. The center said there would be some relief from pollution today due to an increase in winds and the air quality level is expected to be downgraded to “good” or “lightly polluted” with the AQI plunging below 115.

Cold air will push today’s morning low to 1 degrees Celsius, while the high will stay around 5. Tomorrow, the mercury will likely dip to zero.

The chilly mornings will last till Thursday, when it is predicted to be slightly warmer. Highs will bounce back to mid teens on Friday and Saturday with lows between 6 and 7 degrees.

But it will be sunny before a cloud cover arrives on Friday.

The city marked dahan, or major cold, yesterday, the last solar term according to Chinese traditional lunar calendar, which indicates the onset of the coldest period of the year.



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