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Better air quality today, still no sun
By Cai Wenjun and Ni Yinbin |
October 24, 2012, Wednesday
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Print Edition
Print Edition
CLEAN air, as predicted by environmental protection officials, was not in sight yesterday with air pollution continuing to plague Shanghai, especially in the morning.
Fine particle density readings, or PM2.5, namely of airborne particles smaller than 2.5 micrometers, started to rise from 80 micrograms per cubic meter at 5am to a peak of more than 100 micrograms per cubic meter at 9am and 10am. The density started to drop and remained around 60 micrograms per cubic meter in the afternoon.
By 6pm yesterday, the average density of PM2.5 in the latest 24 hours was 77.6 micrograms per cubic meter, while the nation's standard was 75 micrograms per cubic meter.
However, the air quality yesterday was still rated as good because the PM2.5 index, which is on trial, is not yet included in the quality system.
The air quality is expected to be better today as the wind turns stronger overnight with the advent of a cold front, the Shanghai Meteorological Bureau said yesterday.
However, sunny days are unlikely over the next few days and the weather should be mostly cloudy and overcast with drizzles due to the strengthening of warm and wet air currents from the southwest, it said.
"Temperatures should gradually climb toward the weekend and there should be another drop after Saturday," said Zhu Jiehua, a chief service officer of the bureau.
Today is forecast to be cloudy to overcast with drizzles in parts of the city and the mercury should range between a low of 16 degrees Celsius and a high of 23.
Yesterday was shuang jiang, meaning fall of frost, according to the Chinese lunar calendar, but October is still too early for frost in a city like Shanghai, Zhu said. "Shanghai usually has its first frost in November," he explained. "The solar term suggests the city and the region has entered the harvest season."
Fine particle density readings, or PM2.5, namely of airborne particles smaller than 2.5 micrometers, started to rise from 80 micrograms per cubic meter at 5am to a peak of more than 100 micrograms per cubic meter at 9am and 10am. The density started to drop and remained around 60 micrograms per cubic meter in the afternoon.
By 6pm yesterday, the average density of PM2.5 in the latest 24 hours was 77.6 micrograms per cubic meter, while the nation's standard was 75 micrograms per cubic meter.
However, the air quality yesterday was still rated as good because the PM2.5 index, which is on trial, is not yet included in the quality system.
The air quality is expected to be better today as the wind turns stronger overnight with the advent of a cold front, the Shanghai Meteorological Bureau said yesterday.
However, sunny days are unlikely over the next few days and the weather should be mostly cloudy and overcast with drizzles due to the strengthening of warm and wet air currents from the southwest, it said.
"Temperatures should gradually climb toward the weekend and there should be another drop after Saturday," said Zhu Jiehua, a chief service officer of the bureau.
Today is forecast to be cloudy to overcast with drizzles in parts of the city and the mercury should range between a low of 16 degrees Celsius and a high of 23.
Yesterday was shuang jiang, meaning fall of frost, according to the Chinese lunar calendar, but October is still too early for frost in a city like Shanghai, Zhu said. "Shanghai usually has its first frost in November," he explained. "The solar term suggests the city and the region has entered the harvest season."
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