The air quality index explained A regular assessment of air quality in the United States started in 1976, about six years after the Environmental Protection Agency was created. A regular assessment of air qualit
The AQI ranges from 0 to 500 and hassix color-coded categoriesto correspond to a different level ofhealthconcern, according to AirNow.gov. Basically, lower numbers equate to better air quality and higher numbers equate to poorer air quality. THE AIR QUALITY INDEX EXPLAINED: WHAT AIR QUALITY IS...
The annual multiple linear regression model for PM 2.5 exhibited the most robust performance, explaining 60% of the variation, while the models for PM 10 and O 3 explained 45% of the variation in their concentrations. Time series modeling projected an increasing trend in the AQI for particulate...
Existing methods for fine-scale air quality assessment have significant gaps in their reliability. Purely data-driven methods lack any physically-based mechanisms to simulate the interactive process of air pollution, potentially leading to physically inc
Moreover, the key explained variable is PM2.5, which is related to the economic development of each city, and we add the per capita GDP of each city. Similarly, the explained variables are outpatient medical expenditures that are influenced by local medical resources and medical insurance, and ...
LDSA is of the greatest concern because in vitro nanoparticle toxicity could be better explained when the lung burden was expressed as total particle surface area instead of atmospheric PM mass (e.g. Oberdörster, 2012; Schmid and Stoeger, 2016). LDSA should be also included in AQI ...
The sound interrupt system (explained further in the device datasheet) uses the peak amplitude value as a trigger for a digital output signal. This can be used to respond rapidly to changes in sound level, without the need for software processing. ...
was partly explained by the significantly positive correlation betweenPrecandT. This also explains why the average concentration of the pollutants PM2.5, PM10, SO2, and NO2during June–September was lower than in other months46,47. Wind speed (W) did not show any marked relationship with the ...
Tests in a research facility indicate that SOx removal was improved in the case of oxygen rich combustion, which can partly be explained by longer gas residence time in the FGD (Marin and Carty 2002; Chatel-Pelage, Marin et al. 2003; Chen, Liu et al. 2007; WRI 2007...
Smog-induced poor visibility has forced Bangkok Airways to cancel its 10 morning flights between Chiang Mai and Mae Hong Son until Saturday. "Flights during other hours of the day can still operate as usual," the airport explained. Fine dust reached hazardous levels in many northern and northeas...