Evaluating ozone predictions from photochemical models using NE-OPS 1999 observations
Document ID: 290
Sun, Qing1
Chandrasekar, Anantharaman1
Georgopoulos, Panos G.1
Philbrick, C. Russell2
Doddridge, Bruce G.3
1 Environmental and Occupational Health Sciences Institute (EOHSI), a joint project of UMDNJ - R. W. Johnson Medical School and Rutgers the State University
2 The Pennsylvania State University, Department of Electrical Engineering and Applied Research Laboratory,University Park, PA, U.S.A.
3 University of Maryland, Department of Meteorology, College Park, MD, U.S.A.
Presented: CMAS Conference
Chapel Hill, North Carolina, 2003
Abstract
The North American Research Strategy for Tropospheric Ozone - North East Oxidant and Particle Study (NARSTO-NE-OPS) is a multiinstitutional collaborative research program set up by USEPA to improve current understanding of the underlying causes for the occurrence (and concurrence) of high ozone and fine particle concentration levels in the North-eastern United States. Various advanced meteorological and air chemistry measurements were made in the vicinity of Philadelphia, Pennsylvania during two field campaigns conducted during the summers of 1998 and 1999 (Philbrick, 2000).
Fast et al. (2002) evaluated an Eulerian chemical transport model developed at PNNL against NE-OPS data obtained during the period
July 23 to August 11, 1999. The present investigation was primarily focused on a major ozone episode that took place in July 15-19, 1999 over the Philadelphia region, to perform an extensive evaluation of two widely used regional/multiscale photochemical models, namely, CMAQ (Byun, 1999) and CAMx (ENVIRON, 2002), in predicting ozone concentration by comparing model outcomes with both surface measurement data from USEPA’s Aerometric Information Retrieval System (AIRS) and upper air aircraft data available from the NE-OPS study (Doddridge, 2000).