HR: 15:10h
AN: A13E-03 INVITED [Abstracts]
TI: Overview of Measurements of Particle Emissions and Ambient Concentrations in Mexico City during the
MCMA-2003 Field Campaign
AU: * Jimenez, J L
EM: jose.jimenez@colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: Dzepina, K
EM: katja.dzepina@colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: Zhang, Q
EM: zhangq@cires.colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: Dunn, M
EM: matthew.dunn@colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: DeCarlo, P
EM: peter.decarlo@colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: Huffman, J
EM: alex.huffman@colorado.edu
AF: Univ. of Colorado, UCB 216, Boulder, CO 80309
United States
AU: Salcedo, D
EM: dara@ciq.uaem.mx
AF: Univ. de Morelos, Av. Universidad 1001, Cuernavaca, 62210
Mexico
AU: Onasch, T
EM: onasch@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Worsnop, D R
EM: worsnop@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Kolb, C E
EM: kolb@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Mortimer, P
EM: mortimer@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Jayne, J T
EM: jayne@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Canagaratna, M R
EM: mrcana@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Rd, Billerica, MA 01821
United States
AU: Volkamer, R
EM: rainer@mit.edu
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Johnsson, K
EM: kirstenj@MIT.EDU
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Zuberi, B
EM: bzuberi@geo2tech.com
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: de Foy, B
EM: foy@MIT.EDU
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Frey, S
EM: lidar@mit.edu
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Molina, M
EM: mmolina@mit.edu
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Molina, L T
EM: ltmolina@mit.edu
AF: MIT, 77, Mass. Ave., Cambridge, MA 02139
United States
AU: Marr, L
EM: lmarr@vt.edu
AF: Virginia Tech, 411 Durham Hall, Blacksburg, VA 24061
United States
AU: Arey, J
EM: janet.Arey@ucr.edu
AF: Univ. California, Riverside, 900 Univ. Ave, Riverside, CA 92521
United States
AU: Cardenas, B
EM: bcar@xanum.uam.mx
AF: CENICA, Perif‚rico 5000, Mexico City, 04530
Mexico
AU: Brune, W H
EM: brune@essc.psu.edu
AF: Penn. State Univ., 503 Walker Bldg., University Park, PA 16802
United States
AU: Smith, J
EM: jimsmith@ucar.edu
AF: NCAR, 1850 Table Mesa, Boulder, CO 80305
United States
AU: McMurry, P
EM: mcmurry@me.umn.edu
AF: U. of Minn., 111 Church St. SE, Minneapolis, MN 55455
United States
AU: Gaffney, J
EM: gaffney@anl.gov
AF: Argonne Nat. Lab, 203/ER, Argonne, IL 60439
United States
AU: Marley, N
EM: marley@anl.gov
AF: Argonne Nat. Lab, 203/ER, Argonne, IL 60439
United States
AU: Laskin, A
EM: alexander.laskin@pnl.gov
AF: PNNL, P.O.Box 999, Richland, WA 99352
United States
AU: Cowin, J
EM: james.cowin@pnl.gov
AF: PNNL, P.O.Box 999, Richland, WA 99352
United States
AU: Bernabe, R
EM: rbernabe@ine.gob.mx
AF: CENICA, Perif‚rico 5000, Mexico City, 04530
Mexico
AU: Blanco, S
EM: sblanco@ine.gob.mx
AF: CENICA, Perif‚rico 5000, Mexico City, 04530
Mexico
AU: Marquez, C
EM: c_marqueze@hotmail.com
AF: CENICA, Perif‚rico 5000, Mexico City, 04530
Mexico
AU: Angeles, F
EM: fangeles@chajul.ine.gob.mx
AF: CENICA, Perif‚rico 5000, Mexico City, 04530
Mexico
AB:
We will summarize the particle emission rates and concentrations measured in Mexico City during the MCMA-2003 field campaign
(3/29-5/5), which will be detailed in additional presentations. Ambient concentration measurements were carried out
continuously at the CENICA Supersite inside the city, and at several other fixed locations using the Aerodyne Mobile
Laboratory (ML). CENICA was equipped with an Aerosol Mass Spectrometer (AMS), an aethalometer, a PM2.5 TEOM, a TSI DustTrack,
a Lasair OPC, a nano-SMPS, a particle PAH detector, and samplers for off-line microscopy (CCSEM-EDX, TEM), composition
analysis (TOF-SIMS, PIXE/PESA, and STEM), and PAH analysis. The ML was equipped with AMS, a CPC, an aethalometer, a
DustTrack, and a PAH detector. Particle precursors were also measured by a number of groups.
The submicron aerosol was dominated by organics, with a smaller contributions of inorganic species, black carbon, dust &
metals. Both mixing layer dynamics and horizontal advection play important roles in the measured concentrations. We used a
new procedure (Zhang et al. this conf.) to estimate the organic that is primary/combustion (~1/3) vs. oxygenated/secondary
(~2/3). Intense secondary aerosol formation was observed, consistent with the high levels of aerosol precursors, radiation,
and radicals (OH, HO2). During the Holy Weekend vacation period concentrations were lower but the mix of species was similar.
We observed two main sources of ultrafine particles in the city: sulfate-dominated new particle formation, and traffic
emissions. Other locations in the city had similar particle concentrations and dynamics as at CENICA, while a boundary site
had significantly lower concentrations except when advection brought city air. PAH measurements will be briefly reviewed.
Freshly-emitted soot is rapidly processed, leading to the presence of inorganic species such as ammonium sulfate on the soot
surface.
The ML was used to characterize on-road aerosol emissions from mixed traffic and from individual vehicles in "chase mode".
Other mobile point and area aerosol emission sources were also characterized by the ML as it mapped the pollutant
concentrations within the city. Examples include elevated NH3 observed in areas with open sewer systems and large spikes in
aerosol Cl- seen during refuse burning events.
UR: http://eaps.mit.edu/megacities/
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting