AIR QUALITY STANDARDS FOR THE CHEMICAL INDUSTRY

Chemical Data Assimilation for Air Quality Forecasting

Unlike the typical design of data assimilation for numerical weather forecasting, initial value optimisation by chemical data assimilation for air quality simulations were often considered as unessential, as errors in initial values were regarded as of vanishing impact. Rather, air surface interactions, especially emissions are a driving forcing factor, while, at the same time, of insufficient ...

Rational establishment of air quality standards.

This paper attempts to apply two principles of rationality--efficiency and equity--to the establishment of air quality standards for total suspended particulates in the USA. It is argued that standard setting should embrace either the use of some cost-benefit-risk criterion, or some concept of equity whereby risks are not reduced below levels judged to be acceptable elsewhere. There is often a ...

National Ambient Air Quality Standards for Particulate Matter ; Final Rule

Chemical Mechanism Solvers in Air Quality Models

The solution of chemical kinetics is one of the most computationally intensive tasks in atmospheric chemical transport simulations. Due to the stiff nature of the system, implicit time stepping algorithms which repeatedly solve linear systems of equations are necessary. This paper reviews the issues and challenges associated with the construction of efficient chemical solvers, discusses several...

Air Quality: An Emerging Issue in the Airport Industry

Today one of the emerging issues in aviation is the assessment, control and reduction of air emissions. In particular airports are increasingly scrutinized for accountability of air emissions contributions to the local and regional air quality. The tasks associated with quantifying air emissions contributions are difficult due to the inconsistency of airport sizes, geographic locations, variabl...