Publications Published in Journal of the Air & Waste Management Association

1. Abatement of ammonia and hydrogen sulfide emissions from a swine lagoon using a polymer biocover. Zahn, J A; Tung, A E; Roberts, B A; Hatfield, J L.
   Journal of the Air & Waste Management Association: 2001
   Notes
   The purpose of this research was to determine the efficiency of a polymer biocover for the abatement of H
   
   
   
2. Attenuation of methane and nonmethane organic compounds in landfill gas affected soils. Kjeldsen, Peter; Dalager, Anne; Broholm, Kim.
   Journal of the Air & Waste Management Association: 1997
   Notes
   Investigates the degradation of landfill gas (LFG) constituents in LFG-affected soils. Evaluation of the importance of the degradation processes to the emission; Studies on the influence of methane oxidation on the lateral migration of landfill gas.
   
   
   
3. Estimations of real-world N2O emissions from road vehicles by means of measurements in a traffic tunnel. Sjodin, Ake; Cooper, David A; Andreasson, Kenth.
   Journal of the Air & Waste Management Association: 1995
   
   
4. Impacts of Lowered Urban Air Temperatures on Precursor Emission and Ozone Air Quality. Taha, Haider; Konopacki, Steven; Akbari, Hashem.
   Journal of the Air & Waste Management Association: 1998
   
   
5. Modeling and spatially distributing forest net primary production at the regional scale. Mickler, R. A.; Earnhardt, T. S.; Moore, J. A..
   Journal of the Air & Waste Management Association: 2002
   Notes
   Forest, agricultural, rangeland, wetland, and urban landscapes have different rates of carbon sequestration and total carbon sequestration potential under alternative management options. Changes in the proportion and spatial distribution of land use could enhance or degrade that area's ability to sequester carbon in terrestrial ecosystems. As the ecosystems within a landscape change due to natural or anthropogenic processes, they may go from being a carbon sink to a carbon source or vice versa. Satellite image analysis has been tested for timely and accurate measurement of spatially explicit land use change and is well suited for use in inventory and monitoring of terrestrial carbon. The coupling of Landsat Thematic Mapper (TM) data with a physiologically based forest productivity model (PnET-II) and historic climatic data provides an opportunity to enhance field plot-based forest inventory and monitoring methodologies.
   
   
   
6. Nitrous Oxide emissions from vehicles. Dasch, Jean Muhlbaier.
   Journal of the Air & Waste Management Association: 1992
   Notes
   The estimate of the contribution of nitrous oxide from mobile sources to total U.S. emissions of greenhouse gases went from one-half percent in the last official inventory, published in 1997 (U.S. EPA) to three percent in the March 10, 1998, draft Inventory of U.S. Greehouse Gas Emissions and Sinks 1990- 1996 (U.S. EPA), which will be referred to in these comments as the Draft Inventory. The primary reason for this change is the use of much larger emission factors for gasoline highway vehicles, rather than increases in vehicle miles traveled. OMS believes that these emission factors are considerably larger than they should be. Therefore, these comments will focus primarily on the origin and validity of the emission factors used in the Draft Inventory and on the development of better ones.
   
   
   
7. Particulate matter in California: Part 2 - Spatial, temporal, and compositional patterns of PM2.5, PM10-2.5, and PM10. Motallebi, N.; Taylor, C. A.; Croes, B. E..
   Journal of the Air & Waste Management Association: 2003
   Notes
   Geographic and temporal variations in the concentration and composition of particulate matter (PM) provide important insights into particle sources, atmospheric processes that influence particle formation, and PM management strategies. In the nonurban areas of California, annual-average PM2.5 and PM10 concentrations range from 3 to 10 mug/m(3) and from 5 to 18 mug/m(3), respectively. In the urban areas of California, annual-averages for PM2.5 range from 7 to 30 mug/m(3), with observed 24-hr peaks reaching levels as high as 160 mug/m(3). Within each air basin, exceedances are a mixture of isolated events as well as periods of elevated PM2.5 concentrations that are more prolonged and regional in nature. PM2.5 concentrations are generally highest during the winter months. The exception is the South Coast Air Basin, where fairly high values occur throughout the year. Annual-average PM2.5 mass, as well as the concentrations of major components, declined from 1988 to 2000.
   
   
   
8. Seasonal variability in CH. Klusman, Ronald W; Dick, Christopher J.
   Journal of the Air & Waste Management Association: 2000
   Notes
   Methane exchange with the atmosphere was measured during three seasons at the Rooney Road landfill in Jefferson County, CO. Substantial spatial and temporal variability in exchange rates were observed. Mean fluxes to the atmosphere were 534, 1290, and 538 mg CH
   
   
   
9. Understanding the effectiveness of precursor reductions in lowering 8-Hr ozone concentrations. Reynolds, Steven D; Blanchard, Charles L; Ziman, Stephen D.
   Journal of the Air & Waste Management Association: 2003
   Notes
   Analyses of ambient measured ozone data were used in conjunction with the application of photochemical modeling to determine the technical feasibility of attaining the federal 8-hr ozone standard in central California. Various combinations of volatile organic compound (VOC) and oxides of nitrogen (NOx) emission reductions were effective in lowering modeled peak 1-hr ozone concentrations. However, VOC emissions reductions were found to have only a modest impact on modeled peak 8-hr ozone concentrations. NOx emission reductions generally lowered 8-hr ozone concentrations, but their effectiveness was partially or, in some cases, wholly offset by the increase in the number of NO cycles and, hence, in the ozone produced per NO. As a result, substantial NOx emission reductions--70 to 90%--were required to reduce peak 8-hr ozone concentrations to the level of the standard throughout the modeling domain. These modeling results provide a possible physical explanation for recent analyses that have reported more prominent trends in peak 1-hr ozone levels than in peak 8-hr ozone concentrations or in occurrences of mid-level (60-90 parts per billion by volume) ozone concentrations. The findings also have serious implications for the feasibility of attaining the 8-hr ozone standard in central California. Further efforts are needed to clarify the applicability of the modeling results to the full set of days with ozone levels exceeding the 8-hr ozone standard, as well as their applicability to other geographical areas.