Particulate Air Pollution in Mexico City: A Collaborative Research Project
PM10, PM2.5, precursor gas, and upper-air meteorological measurements were taken in Mexico City, Mexico, from February 23 to March 22, 1997, to understand concentrations and chemical compositions of the city's particulate matter (PM). Average 24-hr PM10 concentrations over the period of study at the core sites in the city were 75 micrograms/m3. The 24-hr standard of 150 micrograms/m3 was exceeded for seven samples taken during the study period; the maximum 24-hr concentration measured was 542 micrograms/m3. Nearly half of the PM10 was composed of fugitive dust from roadways, construction, and bare land. About 50% of the PM10 consisted of PM2.5, with higher percentages during the morning hours. Organic and black carbon constituted up to half of the PM2.5. PM concentrations were highest during the early morning and after sunset, when the mixed layers were shallow. Meteorological measurements taken during the field campaign show that on most days air was transported out of the Mexico City basin during the afternoon with little day-to-day carryover.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 15007192
- Report Number(s):
- PNNL-SA-30880; JAWAEB; KP1202010; TRN: US200414%%358
- Journal Information:
- Journal of the Air and Waste Management Association, Vol. 49; Other Information: PBD: 1 Oct 1999; ISSN 1047-3289
- Country of Publication:
- United States
- Language:
- English
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