HR: 0830h
AN: A31D-0071    [PDF]
TI: Measurement of CO, NO, NO$_2$, Organic Compounds and PM$_1$$_0$ at a Motorway Location in an Austrian Valley During a Twelve Hour Blockade Period
AU: Beauchamp, J
EM: jonathan.beauchamp@uibk.ac.at
AF: Institute of Ion Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, A-6020 Austria
AU: Armin, W
EM: armin.wisthaler@uibk.ac.at
AF: Institute of Ion Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, A-6020 Austria
AU: Grabmer, W
EM: wolfgang.grabmer@uibk.ac.at
AF: Institute of Ion Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, A-6020 Austria
AU: Graus, M
EM: martin.graus@uibk.ac.at
AF: Institute of Ion Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, A-6020 Austria
AU: Neuner, C
EM: ch.neuner@tirol.gv.at
AF: Landesforstdirektion Waldschutz/Luftguete, Amt der Tiroler Landesregierung, Buergerstr. 36, Innsbruck, A-6020 Austria
AU: Weber, A
EM: an.weber@tirol.gv.at
AF: Landesforstdirektion Waldschutz/Luftguete, Amt der Tiroler Landesregierung, Buergerstr. 36, Innsbruck, A-6020 Austria
AU: * Hansel, A
EM: armin.hansel@uibk.ac.at
AF: Institute of Ion Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, A-6020 Austria
AB: Proton transfer reaction mass spectrometry (PTR-MS) was used during a twelve hour motorway blockade (25th October 2002, 12:00 - 24:00) to detect key chemical compounds in the air. Located within the Inn valley (Tirol, Austria), the monitoring site has restricted dilution conditions for air pollutants and high traffic sources. In-situ measurements took place over an eleven day period (encompassing the one day roadblock) during which time detection of certain aromatic compounds was conducted. Additionally, continuous routine CO, NO and NO$_2$ levels were monitored and detection of PM$_1$$_0$ was carried out. The period of traffic absence showed a dramatic decrease of NO. PM$_1$$_0$, as well as the aromatics, showed a corresponding but slower decrease throughout this period. Analysis of data separated into weekdays and weekends showed significant reductions of NO$_x$ and PM$_1$$_0$ at the weekends, when fewer heavy duty vehicles (HDV) use the motorway, indicating them as being the dominant source of these two pollutants. Principal components analyses (PCA) for the separated data support this. The aromatics in the PCA are clustered together, suggesting their source as being predominantly from light duty vehicles. A mean concentration of benzene over the measurement period was found to be 0.9 ppbV; below the annual 1.5 ppbV EU limit, to be reached by 2010 but above the annual mean target level of 0.78 ppbV set by the Oesterreichischen Akademie der Wissenschaften (Austrian Academy of Sciences). NO$_x$ and PM$_1$$_0$ showed mean values over the entire campaign of 189 $\mu$g m$^-$$^3$ and 24.5 $\mu$g m$^-$$^3$ respectively.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting