Despite the improvement made in controlling local air pollution, urban areas are undergoing increasing environmental pressures and poor air quality is one of the major concerns. Recently, much attention has focused on the relationship between urban form and sustainability. There are indications that the density and the overall shape of cities can have implications on street level ventilation an...

Journey-time exposures represent an important, though as yet little-studied, component of human exposure to traffic-related air pollution, potentially with important health effects. Methods for assessing journey-time exposures, either as part of epidemiological studies or for policy assessment, are, however, poorly developed. This paper describes the development and testing of a GIS-based syste...

Air quality assessment and management is usually performed using atmospheric integrated modelling systems and comparisons with data observed by monitoring stations. In Italy, the Project MINNI (National Integrated Model in support to the International Negotiation on Air Pollution) has been supporting Italian Ministry of Environment for the last ten years within the international negotiation pro...

Three probes for diagnosing photochemical dynamics are presented and applied to specialized ambient surface-level observations and to a numerical photochemical model to better understand rates of production and other process information in the atmosphere and in the model. However, care must be taken to ensure that rate and process information is not confounded by inappropriate averaging over th...

Models-3, a flexible software framework, and its Community Multiscale Air Quality (CMAQ) modeling system form a powerful third generation air quality modeling and assessment tool designed to support air quality modeling applications ranging from regulatory issues to science inquiries on atmospheric science processes. The CMAQ system can address tropospheric ozone, acid deposition, visibility, f...

of Research Findings In 2005, our efforts transitioned from work on the original CP3 windblown dust modeling system toward a new state-of-the-art system based upon the combination of the AIRPACT-3 automated air quality modeling system with the WEPS erosion modeling system. We also brought to a close, field work at the intensive windblown dust field site, and we continued to have a very active r...

Evaluation of a regional air-quality model with bi-directional NH3 exchange coupled to an agro-ecosystem model J. O. Bash, E. J. Cooter, R. L. Dennis, J. T. Walker, and J. E. Pleim National Exposure Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA National Risk Management Research Laboratory, US Environmental Prot...

in many peoples’ minds, air pollution is associated with the contamination of urban air from automobile exhausts and industrial emissions. growing number of scientific evidence has indicated that in industrialized societies, air within buildings can be more seriously polluted than the outdoor air. in the last couple of decades, with the widespread availability of personal computers, mathematica...

(1) Laboratoire des Sciences du Climat et de l’Environnement, IPSL Laboratoire CEA/CNRS/UVSQ, 9 Orme des Merisiers, F-91191 Gif/Yvette CEDEX, France 10 (2) Air Quality Research Division, Science and Technology Branch, Environment Canada, 4905 11 Dufferin Street, Toronto, Ontario, M3H 5T4, Canada 12 (3) European Commission, Joint Research Centre, Institute for Environment and Sustainability, Isp...

This paper shows the impacts of human interference on Nile River morphology. A roadway culvert was constructed to connect an island on Nile River to the eastern bank of the Nile had altered river morphology in the vicinity of the island. The paper focuses on, 1) the efficiency of the roadway culvert to pass the normal flow, and 2) the impact of the roadway culvert on river morphology. A one-dim...