Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Ivar Tombach"'
Autor:
Patricia Brewer, Ivar Tombach
Publikováno v:
Journal of the Air & Waste Management Association. 55:1600-1620
The goal of the regional haze mitigation program in the United States is to attain "natural conditions" in national parks and wilderness areas by 2064. Results of research investigations on background concentrations of sea salt and biogenic organic m
Autor:
Marc Pitchford, Ivar Tombach, Michael G. Barna, William C. Malm, Eladio M. Knipping, Bret A. Schichtel, Kristi A. Gebhart
Publikováno v:
Journal of the Air & Waste Management Association. 55:1726-1732
The recently completed Big Bend Regional Aerosol and Visibility Observational (BRAVO) Study focused on particulate sulfate source attribution for a 4-month period from July through October 1999. A companion paper in this issue by Schichtel et al. des
Publikováno v:
Journal of the Air & Waste Management Association. 50:818-825
The Nested Grid Model (NGM) is a primitive-equation meteorological model that is routinely exercised over North America for forecasting purposes by the National Meteorological Center. While prognostic meteorological models are being increasingly used
Autor:
Christian Seigneur, Pradeep Saxena, Ivar Tombach, Prasad Pai, Peter K. Mueller, Charles E. McDade
Publikováno v:
Journal of the Air & Waste Management Association. 50:835-848
During wintertime, haze episodes occur in the Dallas-Ft. Worth (DFW) urban area. Such episodes are characterized by substantial light scattering by particles and relatively low absorption, leading to so-called "white haze." The objective of this work
Publikováno v:
Journal of the Air & Waste Management Association. 50:826-834
A study was conducted to estimate the changes in wintertime visual air quality in Dallas-Fort Worth (DFW) that might occur due to proposed reductions in SO2 emissions at two steam electric generating plants in eastern Texas, each over 100 km from the
Autor:
John G. Watson, George Thurston, Neil Frank, James P. Lodge, Russell W. Wiener, Frank F. McElroy, Michael T. Kleinman, Peter K. Mueller, Alfred C. Schmidt, Frederick W. Lipfert, Richard J. Thompson, Purnendu K. 'Sandy' Dasgupta, David Marrack, Robert A. Michaels, Tom Moore, Stanley Penkala, Ivar Tombach, Lisa Vestman, Thomas Hauser, Judith C. Chow
Publikováno v:
Journal of the Air & Waste Management Association. 45:666-684
Publikováno v:
Atmospheric Environment. Part A. General Topics. 27:1479-1490
This paper, the second of a two-part series, presents an application of a new semi-empirical methodology to assess the annual average improvements in visual range that can be expected from a reduction of SO2 emissions in the eastern United States. Th
Autor:
John G. Watson, Judith O. Zwicker, Robert A. Eldred, P.J. Feeney, Ivar Tombach, Thomas A. Cahill, C. V. Mathai, Judith C. Chow, C. Fred Rogers
Publikováno v:
Environmental Science & Technology. 24:1090-1099
Several past and ongoing visibility measurement programs in the rural western US have used ambient aerosol samplers of differing designs. These differences make a direct comparison of aerosol data from these studies difficult. In order to establish t
Publikováno v:
Atmospheric Environment. Part A. General Topics. 24:2361-2368
This paper, the first of a two-part series, presents a new semi-empirical methodology that allows estimation of the percentage improvements in annual average visual range that can be expected from a percentage reduction of SO 2 emissions. This method
Autor:
William C. Malm, Marc Pitchford, Kristi A. Gebhart, Michael G. Barna, Bret A. Schichtel, Ivar Tombach, Eladio M. Knipping
Publikováno v:
Journal of the AirWaste Management Association (1995). 55(11)
The Big Bend Regional Aerosol and Visibility Observational (BRAVO) study was an intensive monitoring study from July through October 1999 followed by extensive assessments to determine the causes and sources of haze in Big Bend National Park, located