Separation of emitted and photochemical formaldehyde in Mexico City using a statistical analysis and a new pair of gas-phase tracers

被引：122

作者：

Garcia, A. R. ^{[1
]}

Volkamer, R.

Molina, L. T.

Molina, M. J.

Samuelson, J.

Mellqvist, J.

Galle, B.

Herndon, S. C.

Kolb, C. E.

机构：

[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 01239 USA

[2] Chalmers Tekniska Hoegskola, Gothenburg, Sweden

[3] Aerodyne Res Inc, Ctr Atmospher & Environm Chem, Billerica, MA 01821 USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2006年 / 6卷

关键词：

D O I：

10.5194/acp-6-4545-2006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photochemical pollution control strategies require an understanding of photochemical oxidation precursors, making it important to distinguish between primary and secondary sources of HCHO. Estimates for the relative strengths of primary and secondary sources of formaldehyde ( HCHO) were obtained using a statistical regression analysis with time series data of carbon monoxide ( CO) and glyoxal (CHOCHO) measured in the Mexico City Metropolitan Area (MCMA) during the spring of 2003. Differences between Easter week and more typical weeks are evaluated. The use of CO-CHOCHO as HCHO tracers is more suitable for differentiating primary and secondary sources than CO-O-3. The application of the CO-O-3 tracer pair to mobile laboratory data suggests a potential in-city source of background HCHO. A significant amount of HCHO observed in the MCMA is associated with primary emissions.

引用

页码：4545 / 4557

页数：13

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