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Air Pollution Transport in an Alpine Valley: Results From Airborne and Ground-Based Observations

Gohm, Alexander and Harnisch, Florian and Vergeiner, Johannes and Obleitner, F. and Schnitzhofer, R. and Hansel, A. and Fix, Andreas and Neininger, Bruno and Emeis, Stefan and Schäfer, K. (2009) Air Pollution Transport in an Alpine Valley: Results From Airborne and Ground-Based Observations. Boundary-Layer Meteorology, 131, pp. 441-463. DOI: 10.1007/s10546-009-9371-9. ISSN 0006-8314.

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Official URL: http://link.springer.com/article/10.1007%2Fs10546-009-9371-9

Abstract

An observational dataset from a wintertime field campaign in the Inn Valley, Austria, is analysed in order to study mechanisms of air pollution transport in an Alpine valley. The results illustrate three types of mechanisms: transport by a density current, back-and-forth transport by valley winds, and transport by slope winds. The first type is associated with an air mass difference along the valley. Cooler air located in the lower part of the valley behaves like a density current and produces the advection of pollutants by upvalley winds. In the second type, strong horizontal gradients in pollution concentrations exist close to ground. Multiple wind reversals result in a back-and-forth transport of pollutants by weak valley winds. In the third type, upslope winds during daytime decrease low-level pollution concentrations and cause the formation of elevated pollution layers.

Document Type:Article
Title:Air Pollution Transport in an Alpine Valley: Results From Airborne and Ground-Based Observations
Authors:
AuthorsInstitution or Email of Authors
Gohm, AlexanderUniv. of Innsbruck, A
Harnisch, FlorianDLR, IPA
Vergeiner, JohannesUniv. of Innsbruck, A
Obleitner, F.Univ. of Innsbruck, A
Schnitzhofer, R.Univ. of Innsbruck, A
Hansel, A.Univ. of Innsbruck, A
Fix, AndreasDLR, IPA
Neininger, BrunoMetAir AG, Menzingen, CH
Emeis, StefanForschungszentrum Karlsruhe, Garmisch-Partenkirchen
Schäfer, K.Forschungszentrum Karlsruhe, Garmisch-Partenkirchen
Date:March 2009
Journal or Publication Title:Boundary-Layer Meteorology
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:131
DOI:10.1007/s10546-009-9371-9
Page Range:pp. 441-463
ISSN:0006-8314
Status:Published
Keywords:Aerosols, ALPNAP, Foehn, Lidar, Local winds, NOx, Particulate matter
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Stephanie Zähnle
Deposited On:21 Apr 2009
Last Modified:23 Jul 2015 16:45

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