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Air remains lightly polluted, another cold front to hit city
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The Shanghai Environmental Monitoring Center said the city’s “lightly polluted” air quality yesterday was because of big particles flying in from the north.
Big particles, measured as PM10, are usually brought by dirt and sand dust.
The air quality is unlikely to change today with PM2.5 pollutants to blame this time.
PM2.5 refers to airborne particles which are smaller than 2.5 micrometers in diameter. They are the main cause of urban smog and are harmful to human health.
The weather conditions — high pressure and poor wind — also makes it difficult to disperse the air pollutants.
With a cold front coming down from the north, the mercury dropped to a low of 8 degrees Celsius yesterday, according to the observatory in Xujiahui.
In suburban districts like Fengxian and Jinshan, the lowest temperature recorded was 6.7 degrees and 6.9 degrees, respectively.
Today and tomorrow the temperature is expected to hover between 6 and 13 degrees, the Shanghai Meteorological Bureau said.
Another round of cold front will hit the city tomorrow night and on Thursday, bringing with it gales and pushing down the temperature further.
The mercury should drop to a low of 2 degrees on Thursday and 1 degree on Friday.
In suburban districts, the mercury is expected to dip minus on Friday morning.
Zhang Ruiyi, a chief service officer at the bureau, urged residents to stay warm and drink more water as the cold front was likely to stay this week along with the dry weather.
But the week will be cloudy, and at times sunny.
On Saturday, the temperature will return to 10 degrees but the low will be 2.
Meteorological winter officially sets in after the average temperature stays below 10 degrees for five consecutive days. The meteorological winter is round the corner, but the official declaration will likely take a while as the bureau only forecasts weather for five days.
Shanghai usually enters winter in early December.
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