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A multimethodological approach to study the spatial distribution of air pollution in an Alpine valley during wintertime

Schnitzhofer, R. and Norman, M. and Wisthaler, A. and Vergeiner, J. and Harnisch, F. and Gohm, A. and Obleitner, F. and Fix, A. and Neininger, B. and Hansel, A. (2009) A multimethodological approach to study the spatial distribution of air pollution in an Alpine valley during wintertime. Atmospheric Chemistry and Physics, 9, pp. 3385-3396. European Geosciences Union.

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Official URL: http://www.atmos-chem-phys.net/9/3385/2009/acp-9-3385-2009.html

Abstract

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 (NOx-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. This vertical mixing due to thermally or dynamically driven slope winds reduces the concentration of air pollutants at the bottom of the valley and causes the formation of elevated pollution layers.

Document Type:Article
Title:A multimethodological approach to study the spatial distribution of air pollution in an Alpine valley during wintertime
Authors:
AuthorsInstitution or Email of Authors
Schnitzhofer, R.Univ. of Innsbruck, Innsbruck, A
Norman, M.Univ. of Innsbruck, Innsbruck, A
Wisthaler, A.Univ. of Innsbruck, Innsbruck, A
Vergeiner, J.Univ. of Innsbruck, Innsbruck, A
Harnisch, F.Univ. of Innsbruck, Innsbruck, A
Gohm, A.Univ. of Innsbruck, Innsbruck, A
Obleitner, F.Univ. of Innsbruck, Innsbruck, A
Fix, A.DLR
Neininger, B.MetAir AG, Menzingen, CH
Hansel, A.Univ. of Innsbruck, Innsbruck, A
Date:26 May 2009
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
Page Range:pp. 3385-3396
Publisher:European Geosciences Union
Status:Published
Keywords:Air pollution, aircraft measurements, balloon measurements
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Andreas Fix
Deposited On:15 Dec 2009 16:10
Last Modified:12 Dec 2013 20:49

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