München 2004 – wissenschaftliches Programm
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UP: Umweltphysik
UP 16: Poster: Atmosph
äre
UP 16.2: Poster
Dienstag, 23. März 2004, 14:00–16:00, Schellingstr. 3
Measurement of CO, NO, NO2, Organic Compounds and PM10 at a Motorway Location in an Austrian Valley during a Twelve Hour Blockade Period — •Jonathan Beauchamp1, Armin Wisthaler1, Wolfgang Grabmer1, Christian Neuner2, Andreas Weber2, and Armin Hansel1 — 1Institut fuer Ionenphysik, Universitaet Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria — 2Landesforstdirektion Waldschutz/Luftguete, Amt der Tiroler Landesregierung, Buergerstr. 36, A-6020 Innsbruck, Austria
In-situ measurements of key chemical compounds took place over an eleven day period encompassing a twelve hour motorway blockade (25th October 2002, 12:00 noon to 24:00 midnight). Located within the Inn valley (Tirol, Austria), the monitoring site has restricted dilution conditions for air pollutants and high traffic sources. Continuous levels of CO, NO, NO2 and certain organic compounds were monitored and detection of PM10 was carried out. The period of traffic absence showed a dramatic decrease of NO. PM10, 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 NOx and PM10 at the weekend, when fewer heavy duty vehicles (HDV) use the motorway, implicating HDV as the dominant source of these two pollutants. Principal components analyses for the separated data further support this.
Finally, our data clearly restate the dominating meteorological influence which cause severely restricted dispersion conditions for air pollutants in Alpine valleys.