Search Results

You are looking at 1 - 5 of 5 items for :

  • Forecasting x
  • NOAA/EPA Golden Jubilee x
  • All content x
Clear All
C. Hogrefe, W. Hao, K. Civerolo, J.-Y. Ku, G. Sistla, R. S. Gaza, L. Sedefian, K. Schere, A. Gilliland, and R. Mathur

1. Introduction Many U.S. air quality forecasting programs for ozone (O 3 ) and fine particulate matter (PM 2.5 ) operated by federal, state, and local agencies are based on a combination of weather prediction, statistical analysis, and expert judgment ( Gaza 1998 ; Ryan et al. 2000 ; Dye et al. 2000 ; U.S. EPA 2003a ). The application of grid-based photochemical modeling systems to provide real-time air quality forecasts has been a fairly recent development and has been mostly restricted to

Full access
John S. Irwin, William B. Petersen, and Steven C. Howard

the width of the dispersing plume, we conducted an investigation using approximately thirty 24-h Eta forecasts (yeardays 182–212, 2005), which are publicly available and have a horizontal grid size of 12 km. We selected four locations along the eastern United States (New York, Washington, Atlanta, and Miami). The puff trajectories were simulated using INPUFF, which cannot treat the effects of variations in the winds as a function of height. A puff was released at the start of the 0000 UTC forecast

Full access
Armin Aulinger, Volker Matthias, and Markus Quante

)], planetary boundary layer processes [Medium Range Forecast (MRF) Model scheme based on Hong and Pan (1996) ], and radiation (considering cloud effects on radiation). Last, the Meteorology–Chemistry Interface Preprocessor (MCIP), version 3.0, ( Otte 1999 ) was used to calculate the required meteorological variables from the meteorological fields to drive the CMAQ Chemistry Transport Model (CCTM). The Carbon Bond 4 (CB4) chemical mechanism ( Gery et al. 1989 ), including aerosol and aqueous phase

Full access
George Kallos, Marina Astitha, Petros Katsafados, and Chris Spyrou

activity over the Indian Ocean are evident. The resulting pressure gradient over the GMR is relatively strong (10–20 hPa from the western to eastern Mediterranean or even greater), and its variability defines the onset of trade wind systems like the etesians over the Aegean Sea. Figure 1 is produced with the use of mean monthly sea level pressure fields for August of 2001 from the European Centre for Medium-Range Weather Forecasts (ECMWF) analysis fields. The general pattern of the flow over the GMR

Full access
M. Talat Odman, Yongtao Hu, Alper Unal, Armistead G. Russell, and James W. Boylan

: CMAQ/CAMx annual 2002 performance evaluation over the eastern U.S. Atmos. Environ. , 40 , 4906 – 4919 . Vautard , R. , M. Beekmann , J. Roux , and D. Gombert , 2001 : Validation of a hybrid forecasting system for the ozone concentration over the Paris area. Atmos. Environ. , 35 , 2449 – 2461 . Yang , Y. J. , J. G. Wilkinson , and A. G. Russell , 1997 : Fast, direct sensitivity analysis of multidimensional photochemical models. Environ. Sci. Technol. , 31 , 2859

Full access