Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 9 1 2009 10.5194/acpd-9-3983-2009 http://www.atmos-chem-phys-discuss.net/9/3983/2009/ http://www.atmos-chem-phys-discuss.net/9/3983/2009/acpd-9-3983-2009.html http://www.atmos-chem-phys-discuss.net/9/3983/2009/acpd-9-3983-2009.pdf 3983 4011 2009-02-09 A multimethodological approach to study the spatial distribution of air pollution in an Alpine valley during wintertime R. Schnitzhofer M. Norman A. Wisthaler J. Vergeiner F. Harnisch A. Gohm F. Obleitner A. Fix B. Neininger A. Hansel armin.hansel@uibk.ac.at Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria Institute of Meteorology and Geophysics, University of Innsbruck, Innsbruck, Austria Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Germany MetAir AG, Menzingen, Switzerland In order to investigate the spatial distribution of air pollutants in the Inn valley (Tyrol, Austria) during wintertime, a joint field campaign of the three research projects ALPNAP (Monitoring and Minimisation of Traffic-Induced Noise and Air Pollution Along Major Alpine Transport Routes), INNAP (Boundary Layer Structure in the Inn Valley during high Air Pollution) and INNOX (NO_x-structure in the Inn Valley during High Air Pollution) was carried out in January/February 2006. In addition to continuous ground based measurements, vertical profiles of various air pollutants and meteorological parameters were obtained on six selected days. For in-situ investigations, a tethered balloon was used to analyse the lowest atmospheric layers, 0–500 m above the valley bottom (a.v.b.), and a research aircraft sampled at 150–2200 m a.v.b. An aircraft equipped with an aerosol backscatter lidar performed nadir measurements at 3000 m a.v.b. Combined results from a typical day show a strongly polluted layer up to about 125 m a.v.b. in the morning. Around midday concentrations on the valley floor decrease indicating some vertical air exchange despite thermally stable conditions. Strong vertical and horizontal gradients with enhanced pollution levels along the sunny side of the valley up to 1300 m a.v.b. were observed in the afternoon. However, this vertical mixing due to thermally or dynamically driven slope and valley winds was not strong enough to renew the valley air volume. Carnuth, W. and Trickl, T.: Transport studies with the IFU three-wavelength aerosol lidar during the VOTALP Mesoclina experiment, Atmos. Environ., 34, 1425–1434, 2000. Chazette, P., Couvert, P., Randriamiarisoa, H., Sanak, J., Bonsang, B., Moral, P., Berthier, S., Salanave, S., and Toussaint, F.: Three-dimensional survey of pollution during winter in French Alps valleys, Atmos. Environ., 39, 1035–1047, 2004. Dreiseitl, E. and Stöhr, D.: Zusammenhänge zwischen Emission – Meteorologie – Immission, in: Auswirkungen des Straßenverkehrs auf die Umwelt – Teilberich Luft/Vegetation/Boden, Bericht an den Tiroler Landtag, 33–38, 1991. European Commission: Keep europe moving – Sustaiable mobility for our continent, available at: http://ec.europa.eu/transport/transport_policy_review/doc/2006_3167_brochure_en.pdf, (last access: 6 February 2009), 2006. Furger, M., Dommen, J., Graber, W K., Poggio, L., Prevot, A. S H., Emeis, S., Grell, G., Trickl, T., Gomiscek, B., Neininger, B., and Wotawa, G.: The VOTALP Mesoclina Valley Campaign 1996 – concept, background and some highlights, Atmos. Environ., 34, 1395–1412, 2000. Gohm, A., Harnisch, F., Obleitner, F., Vergeiner, J., Schnitzhofer, R., Hansel, A., Fix, A., Neininger, B., and Emeis, S.: Air pollution transport in an Alpine valley: Results from airborne and ground-based observations, Bound-Lay. Meteorol., submitted, 2009. Grießer, E.: Quantitative Simulation des NO_x-Konzentrationsverlaufes während der Belastungsepisode im November/Dezember 1999, Master's thesis, Universität Innsbruck, 2003. Hansel, A., Jordan, A., Holzinger, R., Prazeller, P., Vogel, W., and Lindinger, W.: Proton transfer reaction mass spectrometry: on-line trace gas analysis at the ppb level, Int. J. Mass. Spectrom., 149, 609–619, 1995. Harnisch, F., Gohm, A., Fix, A., Schnitzhofer, R., Hansel, A., and Neininger, B.: Spatial distribution of aerosols in the Inn Valley atmosphere during wintertime, Meteorol. Atmos. Phys., doi:10.1029/2006GL028325, 2008. Heimann, D., de~Franceschi, M., Emais, S., Lercher, P., and Seibert, P.: Air Pollution, Traffic Noise and Related Health Effects in the Alpine Space: A Guide for Authorities and Consulters, Universita degli Studi di Trento, Dipartimento di Ingegneria Civile e Abientale, Trento, Italy, available at: http://www.alpnap.org/results.html, (last access: 5 February 2009), 2007. Jensen, M., Wisthaler, A., Hansel, A., Persson, P. O G., and Templeman, B.: Real-time profile of organic trace gases in the Arctic boundary layer obtained during the Arctic Ocean Expedition (AOE-2001), 15th Conference on Boundary Layer and Turbulence, Wageningen, The Netherlands, 15–19 July 2002. Lehner, M. and Gohm, A.: Idealized Simulations of Daytime Pollution Transport in a Steep Valley and its Sensitivity to Thermal Stratification and Surface Albedo, Bound-Lay. Meteorol., submitted, 2009. Lindinger, W., Hansel, A., and Jordan, A.: On-line monitoring of volatile organic compounds at pptv levels by means of Proton-Transfer-Reaction Mass Spectrometry (PTR-MS) Medical applications, food control and environmental research, Int. J. Mass. Spectrom., 173, 191–241, 1998a. Lindinger, W., Hansel, A., and Jordan, A.: Proton-transfer-reaction mass spectrometry (PTR-MS): on-line monitoring of volatile organic compounds at pptv levels, Chem. Soc. Rev., 27, 347–354, 1998b. Meister, A., Fix, A., Flentje, H., Wirth, M., and Ehret, G.: TropOLEX: A New Tuneable Airborne Lidar System for the Measurement of Tropospheric Ozone, in: 6th International Symposium on Tropospheric Profiling, Leipzig, 14–20 September 2003, 233–235, 2003. Neininger, B., Fuchs, W., Baeumle, M., and Volz-Thomas, A.: A small aircraft for more than just ozone: MetAir's "Dimona" after ten years of evolving development, Proceedings of the 11th Symposium on Meteorological Observations and Instrumentation, 2001. Oettl, D., Hausberger, S., Rexeis, M., and Sturm, P.: Simulation of traffic induced NO_x-concentrations near the A12 highway in Austria, Atmos. Environ., 40, 6043–6052, 2006. Prevot, A. S H., Dommen, J., and Bäumle, M.: Influence of road traffic on volatile organic compound concentrations in and above a deep Alpine valley, Atmos. Environ., 34, 4719–4726, 2000. Satzinger, L., Allinger-Csollich, E., Kammerlander, S., Knoflach, O., Lintner, A., Moser, E., Porcham, J., and Schmutzhard, L.: Verkehr in Tirol – Bericht 2006, available at: http://www.tirol.gv.at/fileadmin/www.tirol.gv.at/themen/verkehr/service/publikationen/downloads/VB2006-internet-gesamt2.pdf, (last access: 5 February 2009), 2007. Schlager, H. and Graf, J.: Projekt MEMOSA (Messungen und Modellierung des Schadstoffverhaltens im Alpenraum), Sonderdruck der DLR im Auftrag des Bayerischen Staatsministeriums für Landesentwicklung und Umweltfragen, des Amtes der Tiroler Landesregierung und der Autonomen Provinzen Bozen und Trento, 1–20, 1993. Schnitzhofer, R., Beauchamp, J., Dunkl, J., Wisthaler, A., Weber, A., and Hansel, A.: Long-Term Measurements of CO, NO, NO₂, Benzene, Toluene and PM$_10$ at a Motorway Location in an Austrian Valley, Atmos. Environ., 42(5), 1012–1024, doi:10.1016/j.atmosenv.2007.10.004, 2008. Thudium, J.: Szenarien der Entwicklung des Schweren Güterverkehrs 2002–2012, Auswirkungen des Nachtfahrverbots auf der A12 Oktober 2002–Jänner 2003, Ökoscience, im Auftrag der Tiroler Landesregierung, available at: http://www.tirol.gv.at/fileadmin/www.tirol.gv.at/themen/umwelt/luftwqualitaet/downloads/szenarien-feber2003-endv2.pdf, (last access: 5 February 2009), 2003. Thudium, J.: Lufthygienische Situation im Unterinntal 2004, Ökoscience, im Auftrag der Tiroler Landesregierung, available at: http://www.tirol.gv.at/fileadmin/www.tirol.gv.at/themen/verkehr/verkehrsplanung/downloads/Situation_Unterinntal_2004.pdf, (last access: 5 February 2009), 2005. Vergeiner, I. and Dreiseitl, E.: Valley Winds and Slope Winds – Observation and Elementary Thoughts, Meteorol. Atmos. Phys., 36, 264–286, 1987. Verkehrsclub Österreich: Verkehr ist wachsendes Gesundheitsproblem, available at: http://www.vcoe.at/images/doku/VCOeFactsheetGesundheitundVerkehr.pdf, (last access: 5 February 2009), 2004. Weber, A., Schatzer, D., Schoeler, F., Poellmann, A., and Schwaninger, C.: Luftgüte in Tirol – Bericht über das Jahr 2005, available at: http://www.tirol.gv.at/uploads/media/Jahresbericht-2005.pdf, (last access: 5 February 2009), 2005. Wotawa, G., Seibert, P., Kromp-Kolb, H., and Hirschberg, M.-M.: Verkehrsbedingte Stickoxid-Belastung im Inntal: Einfluss meteorologischer und topographischer Faktoren, Endbericht zum Projekt Nr. 6983 Analyse der Schadstoffbelastung im Inntal des Jubiläumsfonds der Österreichischen Nationalbank, available at: http://www.boku.ac.at/imp/envmet/Inntal-Bericht.pdf, (last access: 5 February 2009), 2000. Zaengl, G.: A reexamation of the valley wind system in the Alpine Inn Valley with numerical simulations, Meteorol. Atmos. Phys., 87, 241–256, 2004.