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Influence of Along-valley Terrain Heterogeneity on Exchange Processes Over Idealized Valleys : Volume 15, Issue 12 (16/06/2015)

By Wagner, J. S.

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Book Id: WPLBN0003988264
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Influence of Along-valley Terrain Heterogeneity on Exchange Processes Over Idealized Valleys : Volume 15, Issue 12 (16/06/2015)  
Author: Wagner, J. S.
Volume: Vol. 15, Issue 12
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Rotach, M. W., Gohm, A., & Wagner, J. S. (2015). Influence of Along-valley Terrain Heterogeneity on Exchange Processes Over Idealized Valleys : Volume 15, Issue 12 (16/06/2015). Retrieved from

Description: Institute of Meteorology and Geophysics, University of Innsbruck, Austria. Idealized numerical simulations of thermally driven flows over various valley–plain topographies are performed under daytime conditions. Valley floor inclination and narrowing valley cross sections are systematically varied to study the influence of along-valley terrain heterogeneity on the developing boundary layer structure, as well as horizontal and vertical transport processes. Valley topographies with inclined valley floors of 0.86° increase upvalley winds by a factor of about 1.9 due to smaller valley volumes (volume effect) and by a factor of about 1.6 due to additional upslope buoyancy forces. Narrowing the valley cross section by 20 km per 100 km along-valley distance increases upvalley winds by a factor of about 2.6. Vertical mass fluxes out of the valley are strongly increased by a factor between 1.8 and 2.8 by narrowing the valley cross sections and by a factor of 1.2 by inclining the valley floor. Trajectory analysis shows intensified horizontal transport of parcels from the foreland into the valley within the boundary layer in cases with inclined floors and narrowing cross sections due to increased upvalley winds.

Influence of along-valley terrain heterogeneity on exchange processes over idealized valleys

Catalano, F. and Cenedese, A.: High-resolution numerical modeling of thermally driven slope winds in a valley with strong capping, J. Appl. Meteorol., 49, 1859–1880, 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, doi:10.1007/s10546-010-9518-8, 2010.; Colette, A., Chow, F. K., and Street, R. L.: A numerical study of inversion-layer breakup and the effects of topographic shading in idealized valleys, J. Appl. Meteorol., 42, 1255–1272, 2.0.CO;2>doi:10.1175/1520-0450(2003)042<1255:ANSOIB>2.0.CO;2, 2003.; Deardorff, J. W.: Stratocumulus-capped mixed layers derived from a 3-dimensional model, Bound.-Lay. Meteorol., 18, 495–527, 1980.; Egger, J.: Atmospheric processes over complex terrain, Vol. 23, chap. Thermally forced flows: Theory, 43–58, Amer. Meteor. Soc., 1990.; Henne, S., Furger, M., Nyeki, S., Steinbacher, M., Neininger, B., de Wekker, S. F. J., Dommen, J., Spichtinger, N., Stohl, A., and Prevot, A. S. H.: Quantification of topographic venting of boundary layer air to the free troposphere, Atmos. Chem. Phys., 4, 497–509, doi:10.5194/acp-4-497-2004, 2004.; Kim, Y.-J., Eckermann, S. D., and Chun, H.-Y.: An overview of the past, present and future of gravity-wave drag parameterization for numerical climate and weather prediction models, Atmos.-Ocean, 41, 65–98, doi:10.3137/ao.410105, 2003.; Li, J.-G. and Atkinson, B. W.: Transition regimes in valley air flows, Bound.-Lay. Meteorol., 91, 385–411, 1999.; Monin, A. S. and Obukhov, A. M.: Basic laws of turbulent mixing in the ground layer of the atmosphere, Akad. Nauk SSSR Geofiz. Inst. Tr., 151, 163–187, 1954.; Prandtl, L.: Mountain and valley winds in stratified air, Essentials of Fluid Dynamics, 422–425, 1952.; Rampanelli, G., Zardi, D., and Rotunno, R.: Mechanisms of up-valley winds, J. Atmos. Sci., 61, 3097–3111, doi:10.1175/JAS-3354.1, 2004.; Riday, C.: The influence of valley geometry on the diurnal valley winds, Master's thesis, Institute of Atmospheric and Climate Sciences ETH Zürich, 2010.; Rotach, M. W. and Zardi, D.: On the boundary-layer structure over highly complex terrain: Key findings from MAP, Q. J. Roy. Meteor. Soc., 133, 937–948, 2007.; Rotach, M. W., Wohlfahrt, G., Hansel, A., Reif, M., Wagner, J. S., and Gohm, A.: The world is not flat – implications for the global carbon balance, B. Am. Meteorol. Soc., 95, 1021–1028, doi:10.1175/BAMS-D-13-00109.1, 2014.; Schmidli, J.: Daytime heat transfer processes over mountainous terrain, J. Atmos. Sci., 70, 4041–4066, doi:10.1175/JAS-D-13-083.1, 2013.; Schmidli, J. and Rotunno, R.: Mechanisms of along-valley winds and heat exchange over mountainous terrain, J. Atmos. Sci., 67, 3033–3047, 2010.; Schmidli, J., Billings, B., Chow, F. K., de Wekker, S. F. J., Doyle, J., Grubisić, V., Holt, T., Jiang, Q., Lundquist, K. A., Sheridan, P., Vosper, S., Whiteman, C. D., Wyszogrodzki, A. A., and Zängl, G.: Intercomparison of mesoscale model simulations of the daytime valley wind system, Mon. Weather Rev., 139, 1389–1409, 2011.; Schumann, U.: Large-eddy simulation of the up-slope boundary layer, Q. J. Roy. Meteor. Soc., 116, 637–670, doi:10.1002/qj.49711649307, 1990.; Serafin, S. and Zardi, D.: Daytime heat transfer processes related to slope flows and turbulent convection in an idealized mountain valley, J. Atmos. Sci., 67, 3739–3756, 2010


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