air pollutant concentration

Since then, for the first time in Indian history, major air pollutant concentrations have dropped in every 5 year period.

Some of the most common parameters mapped in profile are air pollutant concentrations and sound levels.

However, 10 km of altitude is sufficient for most purposes involving air pollutant concentrations.

To convert an air pollutant concentration to an AQI, EPA has developed a calculator.

Given an air pollutant concentration at sea-level atmospheric pressure, the concentration at higher altitudes can be obtained from this equation:

We apportioned benefits among individuals by matching the change in air pollutant concentration in each grid cell with the size of the population that experiences that change.

Air pollutant concentrations expressed as mass per unit volume of atmospheric air (e.g., mg/m, g/m, etc.) at sea level will decrease with increasing altitude.

As an example, given an air pollutant concentration of 260 mg/m at sea level, calculate the equivalent pollutant concentration at an altitude of 2800 meters:

This can be expressed mathematically as the sum of the products of time spent by a person in those different locations by the time-averaged air pollutant concentrations occurring in those locations.

The air quality scientist can run the model successively to study techniques of reducing adverse air pollutant concentrations (for example, by redesigning roadway geometry, altering speed controls or limiting certain types of trucks).

Air pollutant concentrations, as measured or as calculated by air pollution dispersion modeling, must often be converted or corrected to be expressed as required by the regulations issued by various governmental agencies.

The resulting calculations for air pollutant concentrations are often expressed as an air pollutant concentration contour map in order to show the spatial variation in contaminant levels over a wide area under study.

The vehicle was used by EPA's Office of Research & Development (ORD) to study the air pollutant concentrations along with major roadways that was of a great concern to the health of people working at nearby places.

The national AQHI is used most of the time; however, if hourly air pollutant concentrations are higher than Alberta's AAQOs, the AQHI value is replaced (overridden) with the appropriate "High" or "Very High" risk value.

In any case one can calculate three dimensional contours of resulting air pollutant concentrations and use the mathematical model to study alternative roadway designs, various assumptions of worst case meteorology or varying traffic conditions (for example, variations in truck mix, fleet emission controls, or vehicle speed).

In each of those cases it may be important to analyze (air pollutant concentrations or sound levels) at varying heights so as to determine the air quality or noise health effects on people at different elevations, for example, living on different floor levels of an urban apartment.

LMCO's electric vehicle was selected due to its zero-emissions, high-speed capacity, charge time, and overall functionality for the EPA's Near-Road Air Quality Study to evaluate air pollutant concentrations alongside major roadways, which may be a health concern to people living and working nearby.