However, today's air quality also makes people feel a little worried that most parts of northern China have ushered in the first dust process this year, the PM10 in the air has burst out, all friends go out Should pay attention to protection Oh!
Daily Air Quality Report
2018.02.09
Beijing Environmental Protection Center data:
Beijing Air Quality Index (AQI): 65
PM2.5 concentration: 10μg / m3
PM10 concentration: 79 μg / m3
Air quality rating: two good
The monitoring site real-time data
US Embassy monitoring data:
Beijing Air Quality Index (AQI): 163
PM2.5 concentration: 79 μg / m3
Air quality rating: unhealthy
Beijing Air Quality Index real-time / historical data
Zhongguancun today:
Zhongguancun
Note:
The air quality index (AQI) of the U.S. embassy was calculated based on the concentration of PM2.5. In addition to monitoring PM2.5, Beijing Environmental Protection Center also monitored PM10, sulfur dioxide (SO2), nitrogen dioxide (NO2), and carbon monoxide ) And ozone (O3), and calculate the air quality index IAQI for each pollutant separately. Take the maximum of each index as the value of the current air quality index AQI. For the specific calculation method, refer to the China Ministry of Environmental Protection Developed "Ambient Air Quality Index (AQI) technical regulations 'pilot'".
When the air quality in Beijing shows a big change, for example, after many days of haze, a sudden wind blows and the smog is quickly blown away. The air quality index AQI of the U.S. Embassy will rapidly change as the PM2.5 concentration decreases. The change of AQI in the environmental monitoring center is not obvious, because when the environmental monitoring center calculates the PM2.5 air quality index, the data used is not the current concentration of PM2.5 but the average concentration of the past 24 hours ( The value of PM10 is the same as that of PM2.5 and the average value of other pollutants is 1 hour), while the U.S. embassy uses the real-time concentration of PM2.5 to calculate the concentration of PM2.5 in the Environmental Protection Center and the United States embassy PM2.5 concentrations close to the case, The AQI values released by the two sides may differ greatly, and the calculation methods of the two are different and can not be simply compared with each other.
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