Phenomena that influence high ozone concentrations in the Paso del Norte area

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:679382

MacDonald, C P; Roberts, P T; Main, H H; Dye, T S ^[1]; Yarbrough, J ^[2]

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1. Sonoma Technology, Inc., Santa Rosa, CA (United States)
2. EPA, Dallas, TX (United States)

This paper summarizes the results of analyses of meteorological and air quality data for the 1996 Paso del Norte Ozone Study. The purpose of these data analyses was to develop an understanding of the significant chemical and physical processes which lead to high concentrations of ozone in the Paso del Norte study region which includes El Paso, TX; Sunland Park, NM; and Juarez, Mexico. This analysis has shown that the high ozone concentrations are a result of slow convective boundary layer growth, reduced convective boundary layer depth, light surface winds, and high morning surface ozone precursor concentrations. Overlying meteorological conditions observed during high ozone episodes include an upstream aloft high pressure system, aloft warming, and weak surface pressure gradients. The analysis has also shown that aloft carryover of ozone and ozone precursors does not significantly contribute to the surface ozone concentration. Furthermore, hydrocarbon and NO{sub x} data, although spatially limited, show that the system is most often NO{sub x} rather than VOC limited.

• OSTI ID: 679382
• Report Number(s): CONF-980632--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR POLLUTION MONITORING
ATMOSPHERIC CHEMISTRY
HYDROCARBONS
NEW MEXICO
NITROGEN OXIDES
OZONE
REGIONAL ANALYSIS
TEXAS