Characterizing ozone production and response under different meteorological conditions in Mexico City

被引:42
作者
Lei, W. [1 ]
Zavala, M. [1 ]
de Foy, B. [2 ]
Volkamer, R. [1 ,3 ]
Molina, L. T. [1 ]
机构
[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA
[2] St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63103 USA
[3] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA
基金
美国国家科学基金会;
关键词
D O I
10.5194/acp-8-7571-2008
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Photochemistry in polluted atmospheres, particularly the formation of ozone (O-3), depends not only on pollutant emissions, but also on meteorological conditions. In this study a 3-D chemical transport model CAMx was employed to investigate the O-3 formation and its response to emissions reduction under three distinctively different meteorological conditions in the Mexico City Metropolitan Area during the MCMA-2003 field measurement campaign. The O-3 formation characteristics and sensitivity to emissions change were found to be weakly dependent on the meteorological conditions. The evolution of O-3 formation and its sensitivity to NOx and VOC levels were also examined along the photochemical plume transport pathway. The midday O-3 production was found to undergo a rapid increase in a narrow range of chemical aging, while downwind plumes were characterized with low and constant O-3 production, and plumes along their transport pathway were characterized by a combination of the two. The O-3 formation was more VOC sensitive near the source area, but as the plume became chemically aged, O-3 formation became progressively VOC insensitive and more NOx sensitive.
引用
收藏
页码:7571 / 7581
页数:11
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