MacDonal C P, Roberts P T, Main H H, Dye T S, Coe D L, Yarbrough J
Sonoma Technology, Inc., Petaluma, CA 94954-1169, USA.
Sci Total Environ. 2001 Aug 10;276(1-3):93-109. doi: 10.1016/s0048-9697(01)00774-4.
The 1996 Paso del Norte Ozone Study and subsequent data analyses were implemented to develop an understanding of the chemical and physical processes which lead to high concentrations of ozone in the Paso del Norte study area which includes El Paso County, Texas, Sunland Park, New Mexico, and Ciudad Juárez, Mexico. Both the data and data analysis results are being used to support photochemical grid modeling. El Paso County and Sunland Park fail to meet the National Ambient Air Quality Standard (NAAQS) for ozone, and neighboring Ciudad Juárez fails to meet the Mexican ambient standard for ozone. This paper summarizes the measurement campaigns of the 1996 Paso del Norte Ozone Study and the findings and conclusions that arose from subsequent data analyses. Data analyses showed that high ozone concentrations resulted from a combination of conditions, including high surface temperatures, strong sunlight with few clouds, light surface winds and high concentrations of ozone precursors at ground level in the morning, and slow convective boundary layer (CBL) growth. Synoptic-scale meteorological conditions observed during high ozone episodes included an aloft high-pressure system and aloft warming. Aloft carryover of ozone and ozone precursors did not significantly contribute to high concentrations of ozone at the surface.
1996年北帕索臭氧研究及后续数据分析得以开展，目的是了解导致北帕索研究区域臭氧浓度过高的化学和物理过程。该研究区域包括得克萨斯州的埃尔帕索县、新墨西哥州的桑兰帕克以及墨西哥的华雷斯城。数据及数据分析结果均被用于支持光化学网格模型。埃尔帕索县和桑兰帕克未能达到国家臭氧环境空气质量标准（NAAQS），相邻的华雷斯城也未达到墨西哥的臭氧环境标准。本文总结了1996年北帕索臭氧研究的测量活动以及后续数据分析得出的结果和结论。数据分析表明，高臭氧浓度是多种条件共同作用的结果，这些条件包括地表高温、阳光强烈且云量稀少、地表微风以及早晨地面臭氧前体物浓度高，还有对流边界层（CBL）增长缓慢。在高臭氧事件期间观测到的天气尺度气象条件包括高空高压系统和高空变暖。臭氧及臭氧前体物的高空残留对地表高浓度臭氧的贡献并不显著。
