title: Particulate Air Pollution in Mexico City: A Collaborative Research Project.
abstract: PM10, PM25, 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 PM10concentrations over the period of study at the core sites in the city were 75 H g/m3. The 24-hr standard of 150 μ g/m3was exceeded for seven samples taken during the study period; the maximum 24-hr concentration measured was 542 μ g/m3. Nearly half of the PM10was composed of fugitive dust from roadways, construction, and bare land. About 50% of the PM10consisted 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.
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Edgerton
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: X
authors.initials: X
authors.lastname: Bian
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Doran
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Fast
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Hubbe
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Malone
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: W J
authors.initials: WJ
authors.lastname: Shaw
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: C D
authors.initials: CD
authors.lastname: Whiteman
authors.affiliation: a Pacific Northwest National Laboratory , Richland , Washington , USA.
authors.forename: S
authors.initials: S
authors.lastname: Zhong
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: J L
authors.initials: JL
authors.lastname: Arriaga
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: E
authors.initials: E
authors.lastname: Ortiz
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: M
authors.initials: M
authors.lastname: Ruiz
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: G
authors.initials: G
authors.lastname: Sosa
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: E
authors.initials: E
authors.lastname: Vega
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: T
authors.initials: T
authors.lastname: Limon
authors.affiliation: b Instituto Mexicano del Petróleo , Mexico City , Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Guzman
authors.affiliation: c Los Alamos National Laboratory , Los Alamos , New Mexico , USA.
authors.forename: J
authors.initials: J
authors.lastname: Archuleta
authors.affiliation: c Los Alamos National Laboratory , Los Alamos , New Mexico , USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Bossert
authors.affiliation: c Los Alamos National Laboratory , Los Alamos , New Mexico , USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Elliot
authors.affiliation: c Los Alamos National Laboratory , Los Alamos , New Mexico , USA.
authors.forename: J T
authors.initials: JT
authors.lastname: Lee
authors.affiliation: c Los Alamos National Laboratory , Los Alamos , New Mexico , USA.
authors.forename: L A
authors.initials: LA
authors.lastname: McNair
authors.affiliation: d Desert Research Institute , Reno , Nevada , USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Chow
authors.affiliation: d Desert Research Institute , Reno , Nevada , USA.
authors.forename: J G
authors.initials: JG
authors.lastname: Watson
authors.affiliation: e Argonne National Laboratory , Argonne , Illinois , USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Coulter
authors.affiliation: e Argonne National Laboratory , Argonne , Illinois , USA.
authors.forename: P V
authors.initials: PV
authors.lastname: Doskey
authors.affiliation: e Argonne National Laboratory , Argonne , Illinois , USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Gaffney
authors.affiliation: e Argonne National Laboratory , Argonne , Illinois , USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Marley
authors.affiliation: f National Oceanic and Atmospheric Administration , Boulder , Colorado , USA.
authors.forename: W
authors.initials: W
authors.lastname: Neff
authors.affiliation: g U.S. Department of Energy , Germantown , Maryland , USA.
authors.forename: R
authors.initials: R
authors.lastname: Petty