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Volume 16, issue 20
Atmos. Chem. Phys., 16, 13049-13066, 2016
https://doi.org/10.5194/acp-16-13049-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 16, 13049-13066, 2016
https://doi.org/10.5194/acp-16-13049-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 21 Oct 2016

Research article | 21 Oct 2016

Quantifying horizontal and vertical tracer mass fluxes in an idealized valley during daytime

Daniel Leukauf et al.
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Catalano, F. and Cenedese, A.: High-Resolution Numerical Modeling of Thermally Driven Slope Winds in a Valley with Strong Capping, J. Appl. Meteorol. Clim., 49, 1859–1880, https://doi.org/10.1175/2010JAMC2385.1, 2010.
Catalano, F. and Moeng, C.-H.: Large-Eddy Simulation of the Daytime Boundary Layer in an Idealized Valley Using the Weather Research and Forecasting Numerical Model, Bound-Lay. Meteorol., 137, 49–75, https://doi.org/10.1007/s10546-010-9518-8, 2010.
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, https://doi.org/10.1016/j.atmosenv.2004.10.014, 2005.
Chemel, C., Arduini, G., Staquet, C., Largeron, Y., Legain, D., Tzanos, D., and Paci, A.: Valley heat deficit as a bulk measure of wintertime particulate air pollution in the Arve River Valley, Atmos. Environ., 128, 208–215, https://doi.org/10.1016/j.atmosenv.2015.12.058, 2016.
Chow, F. K., Weigel, A. P., Street, R. L., Rotach, M. W., and Xue, M.: High-Resolution Large-Eddy Simulations of Flow in a Steep Alpine Valley. Part I: Methodology, Verification, and Sensitivity Experiments, J. Appl. Meteorol. Clim., 45, 63–86, https://doi.org/10.1175/JAM2322.1, 2006.
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Since populated valleys suffer often from poor air quality, it is of interest to better understand the various mechanisms relevant to remove pollutants from the valley atmosphere. One mechanism is the transport by along-slope flows, which are generated during fair-weather days. In this study we quantify the amount of tracer that is removed from a valley atmosphere and the amount that is re-circulated within the valleys. For this study we are using the numerical weather model WRF.
Since populated valleys suffer often from poor air quality, it is of interest to better...
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