HR: 0800h
AN: A51E-0846    [Abstracts]
TI: Sources of Biogenic and Anthropogenic Semi Volatile Organic Carbonyls and Their Effects on the Air Quality in Suburban and Remote Area
AU: * Matsunaga, S N
EM: smatsu@ucar.edu
AF: Applied Chemistry Division, Faculty of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan
AU: * Matsunaga, S N
EM: smatsu@ucar.edu
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AU: Wiedinmyer, C
EM: christin@ucar.edu
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AU: Kato, S
EM: shungo@atmchem.apchem.metro-u.ac.jp
AF: Applied Chemistry Division, Faculty of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan
AU: Yoshino, A
EM: yoshino@atmchem.apchem.metro-u.ac.jp
AF: Applied Chemistry Division, Faculty of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan
AU: Miyakawa, Y
EM: yunko@atmchem.apchem.metro-u.ac.jp
AF: Applied Chemistry Division, Faculty of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan
AU: Greenberg, J
EM: greenber@ucar.edu
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AU: Kajii, Y
EM: kajii@atmchem.apchem.metro-u.ac.jp
AF: Applied Chemistry Division, Faculty of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan
AU: Guenther, A
EM: guenther@ucar.edu
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AB: Measurements for biogenic and anthropogenic semi volatile organic carbonyl compounds in gas and particle phases have been conducted using an annular denuder sampling system in Tokyo Metropolitan University (TMU), Minami-Ohsawa, Tokyo, Japan (suburban area, May 12-15, 2004) and Boardman, OR, U.S. (remote area, June 9-17, 2004). Number of the samples collected at TMU and Boardman were 20 and 62, respectively, and 3 dicarbonyls (C$_{2}$-C$_{5}$), 5 aliphatic aldehydes (C$_{8}$-C$_{12}$), 2 hydroxy carbonyls (C$_{2}$ and C$_{3}$) and one unsaturated carbonyl were detected in both gas and particle phases in both sites. Concentrations of NO$_{x}$, ozone, CO, VOCs and OH lifetime were also measured in the suburban site. Gaseous concentrations ranged from detection limit (approx 1 pptv) to 520 pptv (methylglyoxal). 15-75% of these compounds existed as aerosols in their total concentrations, in average. The concentrations showed a diurnal variation with a maximum at noontime, and the composition suggested some of the compounds derived from both biogenic and anthropogenic sources. We found that these semi volatile carbonyls had approx 10% of contribution as OH sinks among the gaseous organics in the site. In the remote site, measurements were conducted in a hybrid poplar forest (plantation) and three different sites outside of the forest, and the forest is surrounded mainly by deserts. Suggesting that C$_{8}$-C$_{12}$ aliphatic aldehydes derived from poplar plant and/or soil in the forest, in general, gaseous concentrations of aliphatic aldehydes in down wind site of the forest exceeded those in the forest. In this presentation, we evaluate about the importance of the biogenic and anthropogenic semi volatile carbonyls as OH sinks and as precursors of tropospheric ozone. We also discuss about the importance of the compounds as aerosol components and their sources in the suburban and remote air.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0315 Biosphere/atmosphere interactions
DE: 0365 Troposphere--composition and chemistry
DE: 0400 Biogeosciences
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting