The purpose of this standard operating procedure (SOP) is to explain how to prepare comprehensive project specific air quality statements for inclusion in the project file or environmental review document. This SOP affects projects that are developed by or for review by the Texas Department of Transportation (TxDOT) Environmental Affairs Division (ENV) for roadway/highway projects, including Feder...

The Community Multiscale Air Quality (CMAQ) Modeling System is EPA’s premier modeling system for studying air pollution from global to local scales. For nearly a quarter century, EPA and states have used CMAQ—a powerful computational tool for translating fundamental atmospheric science principles to policy scenarios—to support air quality management. CMAQ is continually updated to incorporate new ...

The importance of and interest to research and investigations of atmospheric composition and its modeling for different applications are substantially increased. Air quality forecast (AQF) and assessment systems help decision makers to improve air quality and public health, mitigate the occurrence of acute air pollution episodes, particularly in urban areas, and reduce the associated impacts on ag...

The producers of this document have implemented an Air Quality Early Warning System to predict extreme air pollution events and give alerts to take necessary steps as per Graded Response Action Plan of the Government of India. The high-level objective of this system is to enable and provide air quality forecasting and information services in a globally harmonized and standardized way tailored to t...

The September and October 2000 meetings of the Air Quality Research Subcommittee of the Committee on the Environment and Natural Resources (CENR) focused on a discussion of federal programs related to air quality forecasting.  This report provides a brief summary of the current state of science as discussed at these meetings, with some additional material that was not presented at the meeting...

These guidelines provide a framework for integrating air quality and climate change considerations into policy development by assessing the interactions between measures to reduce air pollutants and greenhouse gas emissions. They are intended to support policymakers and practitioners in identifying strategies that maximize synergies between clean air and climate objectives while minimizing trade-o...

This document provides guidance to help air quality agencies develop, operate, and evaluate ozone and PM2.5 forecasting programs.  This guidance document provides: • Background information about ozone and PM2.5 and the weather's effect on these pollutants. • A list of how air quality forecasts are currently used. • A summary and evaluation of methods currently used to forecast ...

Numerical models that combine weather forecasting and atmospheric chemistry are here referred to as chemical weather forecasting models. Eighteen operational chemical weather forecasting models on regional and continental scales in Europe are described and compared in this article. Topics discussed in this article include how weather forecasting and atmospheric chemistry models are integrated into...

The Goddard Earth Observing System composition forecast (GEOS-CF) system is a high-resolution (0.25°) global constituent prediction system from NASA's Global Modeling and Assimilation Office (GMAO). GEOS-CF offers a new tool for atmospheric chemistry research, with the goal to supplement NASA's broad range of space-based and in-situ observations. GEOS-CF expands on the GEOS weather and aerosol mod...

The Copernicus Atmosphere Monitoring Service (CAMS) delivers a wide range of free and open products in relation to atmospheric composition at global and regional scales. The CAMS Regional Service produces daily forecasts, analyses, and reanalyses of air quality in Europe. This service relies on a distributed modelling pro duction by 11 teams in 10 European countries: CHIMERE (France), DEHM (Denmar...