PM2.5 is smog indicator??
The average concentration of PM2.5 has for the first time become one of the indicators for smog alerts, according to a new regulation on smog alert that has been modified by the weather forecast and network office under the China Meteorological Administration.
據中廣網報道,28日,中國氣象局預報與網絡司針對霧霾預警信號標準進行了修訂,首次將PM2.5作為發布預警的重要指標之一。
The alert is classified in 3 levels – Yellow, Orange and Red – in accordance with the gravity of the smog. The smoggy weather that has choked many regions including Beijing, Tianjin and Hebei affected a total area of 1.3m sq km, according to Tuesday's monitoring by the Ministry of Environmental Protection. It was the 4th round of heavy smog to hit Beijing in 4 weeks.
此次修訂將霾預警分為黃色、橙色、紅色三級。根據環境保護的監測,29日,包括京津冀在內的多個省份和地區遭受霧霾天,全國霧霾面積達130萬平方公里。這也是北京本月遭受的第4輪霧霾天。
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