HR: 1400h
AN: A33A-11 [Abstracts]
TI: Formaldehyde Surface Distributions and Variability in the Mexico City Basin
AU: Junkermann, W
EM: wolfgang.junkermann@imk.fzk.de
AF: Institute of Meteorology and Climate Research, Atmospheric Environmental Division,
Forschungszentrum Karlsruhe, Kreuzeckbahnstr. 19, Garmisch-Partenkirch, 82467, Germany
AU: Mohr, C
AF: Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México (UNAM),
Circuito Exterior
Ciudad Universitaria, Mexico City, DF 04510, Mexico
AU: * Steinbrecher, R
EM: rainer.steinbrecher@imk.fzk.de
AF: Institute of Meteorology and Climate Research, Atmospheric Environmental Division,
Forschungszentrum Karlsruhe, Kreuzeckbahnstr. 19, Garmisch-Partenkirch, 82467, Germany
AU: Ruiz Suarez, L
EM: ruizs@servidor.unam.mx
AF: Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México (UNAM),
Circuito Exterior
Ciudad Universitaria, Mexico City, DF 04510, Mexico
AB:
Formaldehyde ambient air mole fractions were measured throughout the dry season in March at three different
locations in the Mexico City basin. The continuously running instruments were operated at Tenago del Aire, a site
located in the Chalco valley in the southern venting area of the basin, at the Intituto Mexicano del Petroleo (IMP) in
the northern part of the city and about 30 km north of the city at the campus of the Universidad Tecnològica de
Tecamac (UTTEC). The technique used is the Hantzsch technology with a time resolution of 2 minutes and a
detection limit of 100 ppt. Daily maxima peaked at 35 ppb formaldehyde in the city and about 15 to 20 ppb at the
other sites. During night formaldehyde levels dropped to about 5 ppb or less. It is evident that the observed
spatial and temporal variability in near surface formaldehyde distributions is strongly affected by local and
regional advection processes.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
DE: 0490 Trace gases
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly