Articles | Volume 5, issue 2
https://doi.org/10.5194/wcd-5-609-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wcd-5-609-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Apr 2024
Research article |
| 25 Apr 2024
| 25 Apr 2024
Exploring the daytime boundary layer evolution based on Doppler spectrum width from multiple coplanar wind lidars during CROSSINN
Nevio Babić
CORRESPONDING AUTHOR
Croatia Control Ltd., Ulica Rudolfa Fizira 2, 10410, Velika Gorica, Croatia
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Bianca Adler
CIRES, University of Colorado Boulder, and NOAA/Physical Sciences Laboratory, Boulder, Colorado, USA
Alexander Gohm
Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
Manuela Lehner
Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
Norbert Kalthoff
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
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Cited articles
Adler, B. and Kalthoff, N.: Multi-scale transport processes observed in the boundary layer over a mountainous island, Bound.-Lay. Meteorol., 153, 515–537, https://doi.org/10.1007/s10546-014-9957-8, 2014. a, b
Adler, B. and Kalthoff, N.: The impact of upstream flow on the atmospheric boundary layer in a valley on a mountainous island, Bound.-Lay. Meteorol., 158, 429–452, https://doi.org/10.1007/s10546-015-0092-y, 2016. a, b
Adler, B., Kalthoff, N., and Kiseleva, O.: Detection of structures in the horizontal wind field over complex terrain using coplanar Doppler lidar scans, Meteorol. Z., 29, 467–481, https://doi.org/10.1127/metz/2020/1031, 2020. a, b
Adler, B., Babić, N., Kalthoff, N., Corsmeier, U., Kottmeier, C., and Mallaun, C.: CROSSINN (Cross-valley flow in the Inn Valley investigated by dual-Doppler lidar measurements) – Aircraft data set [FDLR], KITopen [data set], https://doi.org/10.5445/IR/1000127862, 2021a. a
Adler, B., Babić, N., Kalthoff, N., and Wieser, A.: CROSSINN (Cross-valley flow in the Inn Valley investigated by dual-Doppler lidar measurements) – KITcube data sets [WLS200s], KITopen [data set], https://doi.org/10.5445/IR/1000127847, 2021b. a
Adler, B., Babić, N., Kalthoff, N., and Wieser, A.: CROSSINN (Cross-valley flow in the Inn Valley investigated by dual-Doppler lidar measurements) – KITcube data sets [CHM 15k, GRAW, HATPRO2, Mobotix, Photos], KITopen [data set], https://doi.org/10.5445/IR/1000127577, 2021c. a
Adler, B., Gohm, A., Kalthoff, N., Babić, N., Corsmeier, U., Lehner, M., Rotach, M. W., Haid, M., Markmann, P., Gast, E., Tsaknakis, G., and Georgoussis, G.: CROSSINN – A Field Experiment to Study the Three-Dimensional Flow Structure in the Inn Valley, Austria, B. Am. Meteorol. Soc., 102, E38–E60, https://doi.org/10.1175/BAMS-D-19-0283.1, 2021d. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q
Avissar, R. and Schmidt, T.: An evaluation of the scale at which ground-surface heat flux patchiness affects the convective boundary layer using large-eddy simulations, J. Atmos. Sci., 55, 2666–2689, https://doi.org/10.1175/1520-0469(1998)055<2666:AEOTSA>2.0.CO;2, 1998. a
Babić, N. and De Wekker, S. F.: Characteristics of roll and cellular convection in a deep and wide semiarid valley: A large-eddy simulation study, Atmos. Res., 223, 74–87, 2019. a
Babić, N., Adler, B., Gohm, A., Kalthoff, N., Haid, M., Lehner, M., Ladstätter, P., and Rotach, M. W.: Cross-valley vortices in the Inn Valley, Austria: Structure, evolution and governing force imbalances, Q. J. Roy. Meteor. Soc., 147, 3835–3861, https://doi.org/10.1002/qj.4159, 2021. a
Banta, R. M., Shun, C., Law, D. C., Brown, W., Reinking, R. F., Hardesty, R. M., Senff, C. J., Brewer, W. A., Post, M., and Darby, L. S.: Observational techniques: Sampling the mountain atmosphere, in: Mountain Weather Research and Forecasting, Springer, 409–530, https://doi.org/10.1007/978-94-007-4098-3_8, 2013. a
Batchvarova, E. and Gryning, S.-E.: Applied model for the growth of the daytime mixed layer, Bound.-Lay. Meteorol., 56, 261–274, https://doi.org/10.1007/BF00120423, 1991. a
Blay-Carreras, E., Pino, D., Vilà-Guerau de Arellano, J., van de Boer, A., De Coster, O., Darbieu, C., Hartogensis, O., Lohou, F., Lothon, M., and Pietersen, H.: Role of the residual layer and large-scale subsidence on the development and evolution of the convective boundary layer, Atmos. Chem. Phys., 14, 4515–4530, https://doi.org/10.5194/acp-14-4515-2014, 2014. a
Brötz, B., Eigenmann, R., Dornbrack, A., Foken, T., and Wirth, V.: Early-morning flow transition in a valley in low-mountain terrain under clear-sky conditions, Bound.-Lay. Meteorol., 152, 45–64, https://doi.org/10.1007/s10546-014-9921-7, 2014. a
Calhoun, R., Heap, R., Princevac, M., Newsom, R., Fernando, H., and Ligon, D.: Virtual towers using coherent Doppler lidar during the Joint Urban 2003 dispersion experiment, J. Appl. Meteorol. Clim., 45, 1116–1126, https://doi.org/10.1175/JAM2391.1, 2006. a
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. a
Cimini, D., De Angelis, F., Dupont, J.-C., Pal, S., and Haeffelin, M.: Mixing layer height retrievals by multichannel microwave radiometer observations, Atmos. Meas. Tech., 6, 2941–2951, https://doi.org/10.5194/amt-6-2941-2013, 2013. a
Dang, R., Yang, Y., Hu, X.-M., Wang, Z., and Zhang, S.: A review of techniques for diagnosing the atmospheric boundary layer height (ABLH) using aerosol lidar data, Remote Sens., 11, 1590, https://doi.org/10.3390/rs11131590, 2019. a
De Wekker, S., Steyn, D., and Nyeki, S.: A comparison of aerosol-layer and convective boundary-layer structure over a mountain range during STAAARTE'97, Bound.-Lay. Meteorol., 113, 249–271, https://doi.org/10.1023/B:BOUN.0000039371.41823.37, 2004. a
Emeis, S., Schäfer, K., and Münkel, C.: Surface-based remote sensing of the mixing-layer height-a review, Meteorol. Z., 17, 621–630, https://doi.org/10.1127/0941-2948/2008/0312, 2008. a, b
Emeis, S., Kalthoff, N., Adler, B., Pardyjak, E., Paci, A., and Junkermann, W.: High-Resolution Observations of Transport and Exchange Processes in Mountainous Terrain, Atmosphere, 9, 457, https://doi.org/10.3390/atmos9120457, 2018. a, b
Giovannini, L., Ferrero, E., Karl, T., Rotach, M. W., Staquet, C., Trini Castelli, S., and Zardi, D.: Atmospheric pollutant dispersion over complex terrain: Challenges and needs for improving air quality measurements and modeling, Atmosphere, 11, 646, https://doi.org/10.3390/atmos11060646, 2020. a
Goger, B., Rotach, M. W., Gohm, A., Fuhrer, O., Stiperski, I., and Holtslag, A. A.: The impact of three-dimensional effects on the simulation of turbulence kinetic energy in a major alpine valley, Bound.-Lay. Meteorol., 168, 1–27, https://doi.org/10.1007/s10546-018-0341-y, 2018. a
Goger, B., Rotach, M. W., Gohm, A., Stiperski, I., Fuhrer, O., and De Morsier, G.: A new horizontal length scale for a three-dimensional turbulence parameterization in mesoscale atmospheric modeling over highly complex terrain, J. Appl. Meteorol. Clim., 58, 2087–2102, https://doi.org/10.1175/JAMC-D-18-0328.1, 2019. a, b, c, d
Gohm, A. and Mayr, G.: Hydraulic aspects of föhn winds in an Alpine valley, Q. J. Roy. Meteor. Soc., 130, 449–480, https://doi.org/10.1256/qj.03.28, 2004. a, b, c
Gohm, A., Harnisch, F., Vergeiner, J., Obleitner, F., Schnitzhofer, R., Hansel, A., Fix, A., Neininger, B., Emeis, S., and Schäfer, K.: Air pollution transport in an Alpine valley: Results from airborne and ground-based observations, Bound.-Lay. Meteorol., 131, 441–463, https://doi.org/10.1007/s10546-009-9371-9, 2009. a, b, c
Graf, M., Kossmann, M., Trusilova, K., and Mühlbacher, G.: Identification and climatology of alpine pumping from a regional climate simulation, Front. Earth Sci., 5, 1–11, https://doi.org/10.3389/feart.2016.00005, 2016. a
Haid, M., Gohm, A., Umek, L., Ward, H., Muschinski, T., Lehner, L., and Rotach, M.: Foehn–cold pool interactions in the Inn Valley during PIANO IOP2, Q. J. Roy. Meteor. Soc., 146, 1232–1263, https://doi.org/10.1002/qj.3735, 2020. a, b, c, d
Haid, M., Gohm, A., Umek, L., Ward, H. C., and Rotach, M. W.: Cold-air pool processes in the Inn Valley during foehn: A comparison of four IOPs during PIANO, Bound.-Lay. Meteorol., 182, 335–362, https://doi.org/10.1007/s10546-021-00663-9, 2022. a, b, c, d
Heo, B.-H., Jacoby-Koaly, S., Kim, K.-E., Campistron, B., Benech, B., and Jung, E.-S.: Use of the Doppler spectral width to improve the estimation of the convective boundary layer height from UHF wind profiler observations, J. Atmos. Ocean. Tech., 20, 408–424, https://doi.org/10.1175/1520-0426(2003)020<0408:UOTDSW>2.0.CO;2, 2003. a
Hill, M., Calhoun, R., Fernando, H., Wieser, A., Dörnbrack, A., Weissmann, M., Mayr, G., and Newsom, R.: Coplanar Doppler lidar retrieval of rotors from T-REX, J. Atmos. Sci., 67, 713–729, https://doi.org/10.1175/2009JAS3016.1, 2010. a, b
Istok, M. J. and Doviak, R. J.: Analysis of the relation between Doppler spectral width and thunderstorm turbulence, J. Atmos. Sci., 43, 2199–2214, https://doi.org/10.1175/1520-0469(1986)043<2199:AOTRBD>2.0.CO;2, 1986. a
Jiang, Q., Smith, R. B., and Doyle, J. D.: Impact of the atmospheric boundary layer on mountain waves, J. Atmos. Sci., 65, 592–608, https://doi.org/10.1175/2007JAS2376.1, 2008. a
Kalthoff, N., Binder, H.-J., Kossmann, M., Vögtlin, R., Corsmeier, U., Fiedler, F., and Schlager, H.: Temporal evolution and spatial variation of the boundary layer over complex terrain, Atmos. Environ., 32, 1179–1194, https://doi.org/10.1016/S1352-2310(97)00193-3, 1998. a
Kalthoff, N., Adler, B., Wieser, A., Kohler, M., Träumner, K., Handwerker, J., Corsmeier, U., Khodayar, S., Lambert, D., Kopmann, A., Kunka, N., Galina, D., Ramatschi, M., Wickert, J., and Kottmeier, C.: KITcube – a mobile observation platform for convection studies deployed during HyMeX, Meteorol. Z., 22, 633–647, https://doi.org/10.1127/0941-2948/2013/0542, 2013. a
Kalthoff, N., Adler, B., and Bischoff-Gauss, I.: Spatio-temporal structure of the boundary layer under the impact of mountain waves, Meteorol. Z., 29, 409, https://doi.org/10.1127/metz/2020/1033, 2020. a, b
Ketterer, C., Zieger, P., Bukowiecki, N., Collaud Coen, M., Maier, O., Ruffieux, D., and Weingartner, E.: Investigation of the planetary boundary layer in the Swiss Alps using remote sensing and in situ measurements, Bound.-Lay. Meteorol., 151, 317–334, https://doi.org/10.1007/s10546-013-9897-8, 2014. a
Kirshbaum, D. J., Adler, B., Kalthoff, N., Barthlott, C., and Serafin, S.: Moist orographic convection: Physical mechanisms and links to surface-exchange processes, Atmosphere, 9, 80, https://doi.org/10.3390/atmos9030080, 2018. a
Kossmann, M., Vögtlin, R., Corsmeier, U., Vogel, B., Fiedler, F., Binder, H.-J., Kalthoff, N., and Beyrich, F.: Aspects of the convective boundary layer structure over complex terrain, Atmos. Environ., 32, 1323–1348, https://doi.org/10.1016/S1352-2310(97)00271-9, 1998. a, b, c, d
Kottmeier, C., Adler, B., Kalthoff, N., Löhnert, U., and Görsdorf, U.: Composite Atmospheric Profiling, in: Springer Handbook of Atmospheric Measurements, Springer, 1295–1319, https://doi.org/10.1007/978-3-030-52171-4_47, 2021. a
Lang, M. N., Gohm, A., and Wagner, J. S.: The impact of embedded valleys on daytime pollution transport over a mountain range, Atmos. Chem. Phys., 15, 11981–11998, https://doi.org/10.5194/acp-15-11981-2015, 2015. a, b
Lehner, M. and Rotach, M. W.: Current challenges in understanding and predicting transport and exchange in the atmosphere over mountainous terrain, Atmosphere, 9, 276, https://doi.org/10.3390/atmos9070276, 2018. a, b, c
Lehner, M., Rotach, M. W., and Obleitner, F.: A method to identify synoptically undisturbed, clear-sky conditions for valley-wind analysis, Bound.-Lay. Meteorol., 173, 435–450, https://doi.org/10.1007/s10546-019-00471-2, 2019. a
Leukauf, D., Gohm, A., Rotach, M. W., and Wagner, J. S.: The impact of the temperature inversion breakup on the exchange of heat and mass in an idealized valley: Sensitivity to the radiative forcing, J. Appl. Meteorol. Clim., 54, 2199–2216, https://doi.org/10.1175/JAMC-D-15-0091.1, 2015. a, b
Leukauf, D., Gohm, A., and Rotach, M. W.: Quantifying horizontal and vertical tracer mass fluxes in an idealized valley during daytime, Atmos. Chem. Phys., 16, 13049–13066, https://doi.org/10.5194/acp-16-13049-2016, 2016. a
Leukauf, D., Gohm, A., and Rotach, M. W.: Toward generalizing the impact of surface heating, stratification, and terrain geometry on the daytime heat export from an idealized valley, J. Appl. Meteorol. Clim., 56, 2711–2727, https://doi.org/10.1175/JAMC-D-16-0378.1, 2017. a, b
Lugauer, M. and Winkler, P.: Thermal circulation in South Bavaria-climatology and synoptic aspects, Meteorol. Z., 14, 15–30, https://doi.org/10.1127/0941-2948/2005/0014-0015, 2005. a, b
Mallaun, C., Giez, A., and Baumann, R.: Calibration of 3-D wind measurements on a single-engine research aircraft, Atmos. Meas. Tech., 8, 3177–3196, https://doi.org/10.5194/amt-8-3177-2015, 2015. a
Moeng, C.-H. and Sullivan, P. P.: A comparison of shear-and buoyancy-driven planetary boundary layer flows, J. Atmos. Sci., 51, 999–1022, https://doi.org/10.1175/1520-0469(1994)051<0999:ACOSAB>2.0.CO;2, 1994. a
Muschinski, T., Gohm, A., Haid, M., Umek, L., and Ward, H. C.: Spatial heterogeneity of the Inn Valley Cold Air Pool during south foehn: Observations from an array of temperature loggers during PIANO, Meteorol. Z., 30, 153–168, https://doi.org/10.1127/metz/2020/1043, 2021. a
Newsom, R. K., Berg, L. K., Shaw, W. J., and Fischer, M. L.: Turbine-scale wind field measurements using dual-Doppler lidar, Wind Energy, 18, 219–235, https://doi.org/10.1002/we.1691, 2015. a
Ouwersloot, H. and Vilà-Guerau de Arellano, J.: Amendment to “Analytical Solution for the Convectively-Mixed Atmospheric Boundary Layer”: Inclusion of Subsidence, Bound.-Lay. Meteorol., 148, 585–591, https://doi.org/10.1007/s10546-013-9837-7, 2013a. a
Ouwersloot, H. and Vilà-Guerau de Arellano, J.: Analytical solution for the convectively-mixed atmospheric boundary layer, Bound.-Lay. Meteorol., 148, 557–583, https://doi.org/10.1007/s10546-013-9816-z, 2013b. a
Pal, S. and Lee, T. R.: Advected air mass reservoirs in the downwind of mountains and their roles in overrunning boundary layer depths over the plains, Geophys. Res. Lett., 46, 10140–10149, https://doi.org/10.1029/2019GL083988, 2019. a
Peña, A. and Mann, J.: Turbulence measurements with dual-Doppler scanning lidars, Remote Sens., 11, 2444, https://doi.org/10.3390/rs11202444, 2019. a
Pietersen, H. P., Vilà-Guerau de Arellano, J., Augustin, P., van de Boer, A., de Coster, O., Delbarre, H., Durand, P., Fourmentin, M., Gioli, B., Hartogensis, O., Lohou, F., Lothon, M., Ouwersloot, H. G., Pino, D., and Reuder, J.: Study of a prototypical convective boundary layer observed during BLLAST: contributions by large-scale forcings, Atmos. Chem. Phys., 15, 4241–4257, https://doi.org/10.5194/acp-15-4241-2015, 2015. a
Plavcan, D., Mayr, G. J., and Zeileis, A.: Automatic and probabilistic foehn diagnosis with a statistical mixture model, J. Appl. Meteorol. Clim., 53, 652–659, https://doi.org/10.1175/JAMC-D-13-0267.1, 2014. a
Ritter, C. and Münkel, C.: Backscatter Lidar for Aerosol and Cloud Profiling, Springer Handbook of Atmospheric Measurements, 685–719, https://doi.org/10.1007/978-3-030-52171-4_24, 2021. a
Rotach, M. W., Gohm, A., Lang, M. N., Leukauf, D., Stiperski, I., and Wagner, J. S.: On the vertical exchange of heat, mass, and momentum over complex, mountainous terrain, Front. Earth. Sci., 3, 76, https://doi.org/10.3389/feart.2015.00076, 2015. a
Rotach, M. W., Stiperski, I., Fuhrer, O., Goger, B., Gohm, A., Obleitner, F., Rau, G., Sfyri, E., and Vergeiner, J.: Investigating exchange processes over complex topography: the Innsbruck Box (i-Box), B. Am. Meteorol. Soc., 98, 787–805, https://doi.org/10.1175/BAMS-D-15-00246.1, 2017. a, b
Rotach, M. W., Serafin, S., Ward, H. C., Arpagaus, M., Colfescu, I., Cuxart, J., De Wekker, S. F. J., Grubišić, V., Kalthoff, N., Karl, T., Kirshbaum, D. J., Lehner, M., Mobbs, S., Paci, A., Palazzi, E., Bailey, A., Schmidli, J., Wittmann, C., Wohlfahrt, G., and Zardi, D.: A Collaborative Effort to Better Understand, Measure, and Model Atmospheric Exchange Processes over Mountains, B. Am. Meteorol. Soc., 103, E1282–E1295, https://doi.org/10.1175/BAMS-D-21-0232.1, 2022. a, b
Schmidli, J.: Daytime heat transfer processes over mountainous terrain, J. Atmos. Sci., 70, 4041–4066, https://doi.org/10.1175/JAS-D-13-083.1, 2013. a, b, c, d
Schmidli, J. and Rotunno, R.: The quasi-steady state of the valley wind system, Front. Earth Sci., 3, 79, https://doi.org/10.3389/feart.2015.00079, 2015. a
Schmidli, J., Billings, B., Chow, F. K., de Wekker, S. F., Doyle, J., Grubišić, 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, https://doi.org/10.1175/2010MWR3523.1, 2011. a
Seidel, D. J., Ao, C. O., and Li, K.: Estimating climatological planetary boundary layer heights from radiosonde observations: Comparison of methods and uncertainty analysis, J. Geophys. Res.-Atmos., 115, D16113, https://doi.org/10.1029/2009JD013680, 2010. a
Seidel, D. J., Zhang, Y., Beljaars, A., Golaz, J.-C., Jacobson, A. R., and Medeiros, B.: Climatology of the planetary boundary layer over the continental United States and Europe, J. Geophys. Res.-Atmos., 117, D17106, https://doi.org/10.1029/2012JD018143, 2012. a
Serafin, S. and Zardi, D.: Daytime development of the boundary layer over a plain and in a valley under fair weather conditions: A comparison by means of idealized numerical simulations, J. Atmos. Sci., 68, 2128–2141, https://doi.org/10.1175/2011JAS3610.1, 2011. a
Serafin, S., Adler, B., Cuxart, J., De Wekker, S. F., Gohm, A., Grisogono, B., Kalthoff, N., Kirshbaum, D. J., Rotach, M. W., Schmidli, J., Stiperski, I., Večenaj, Ž., and Zardi, D.: Exchange processes in the atmospheric boundary layer over mountainous terrain, Atmosphere, 9, 102, https://doi.org/10.3390/atmos9030102, 2018. a, b
Serafin, S., Rotach, M. W., Arpagaus, M., Colfescu, I., Cuxart, J., De Wekker, S. F., Ewans, M. J., Grubišić, V., Kalthoff, N., Karl, T., Kirshbaum, D. J., Lehner, M., Mobbs, S. D., Paci, A., Palazzi, E., Raudzens Bailey, A., Schmidli, J., Wohlfahrt, G., and Zardi, D.: Multi-scale transport and exchange processes in the atmosphere over mountains: Programme and experiment, 42 pp., https://doi.org/10.15203/99106-003-1, 2020. a
Smalikho, I., Köpp, F., and Rahm, S.: Measurement of atmospheric turbulence by 2-µm Doppler lidar, J. Atmos. Ocean. Tech., 22, 1733–1747, https://doi.org/10.1175/JTECH1815.1, 2005. a, b
Stiperski, I. and Rotach, M. W.: On the measurement of turbulence over complex mountainous terrain, Bound.-Lay. Meteorol., 159, 97–121, https://doi.org/10.1007/s10546-015-0103-z, 2016. a
Umek, L., Gohm, A., Haid, M., Ward, H., and Rotach, M.: Large-eddy simulation of foehn–cold pool interactions in the Inn Valley during PIANO IOP 2, Q. J. Roy. Meteor. Soc., 147, 944–982, https://doi.org/10.1002/qj.3954, 2021. a, b
Vergeiner, I. and Dreiseitl, E.: Valley winds and slope winds – Observations and elementary thoughts, Meteorol. Atmos. Phys., 36, 264–286, https://doi.org/10.1007/BF01045154, 1987. a, b, c
Vosper, S. B., Ross, A. N., Renfrew, I. A., Sheridan, P., Elvidge, A. D., and Grubišić, V.: Current challenges in orographic flow dynamics: turbulent exchange due to low-level gravity-wave processes, Atmosphere, 9, 361, https://doi.org/10.3390/atmos9090361, 2018. a
Wagner, J., Gohm, A., and Rotach, M.: The impact of valley geometry on daytime thermally driven flows and vertical transport processes, Q. J. Roy. Meteor. Soc., 141, 1780–1794, https://doi.org/10.1002/qj.2481, 2015. a
Wagner, J. S., Gohm, A., and Rotach, M. W.: The impact of horizontal model grid resolution on the boundary layer structure over an idealized valley, Mon. Weather Rev., 142, 3446–3465, https://doi.org/10.1175/MWR-D-14-00002.1, 2014. a
Ward, H. C.: Scintillometry in urban and complex environments: a review, Meas. Sci. Technol., 28, 064005, https://doi.org/10.1088/1361-6501/aa5e85, 2017. a
Weigel, A. P. and Rotach, M. W.: Flow structure and turbulence characteristics of the daytime atmosphere in a steep and narrow Alpine valley, Q. J. Roy. Meteor. Soc., 130, 2605–2627, https://doi.org/10.1256/qj.03.214, 2004. a
Weinkaemmerer, J., Ďurán, I. B., and Schmidli, J.: The Impact of Large-Scale Winds on Boundary Layer Structure, Thermally Driven Flows, and Exchange Processes over Mountainous Terrain, J. Atmos. Sci., 79, 2685–2701, https://doi.org/10.1175/JAS-D-21-0195.1, 2022. a, b
Weinkaemmerer, J., Göbel, M., Serafin, S., Ďurán, I. B., and Schmidli, J.: Boundary-layer plumes over mountainous terrain in idealized large-eddy simulations, Q. J. Roy. Meteor. Soc., 149, 3183–3197, https://doi.org/10.1002/qj.4551, 2023. a, b
Weissmann, M., Braun, F. J., Gantner, L., Mayr, G. J., Rahm, S., and Reitebuch, O.: The Alpine mountain–plain circulation: Airborne Doppler lidar measurements and numerical simulations, Mon. Weather Rev., 133, 3095–3109, https://doi.org/10.1175/MWR3012.1, 2005. a
Whiteman, C. D., Lehner, M., Hoch, S. W., Adler, B., Kalthoff, N., and Haiden, T.: Katabatically driven cold air intrusions into a basin atmosphere, J. Appl. Meteorol. Clim., 57, 435–455, https://doi.org/10.1175/JAMC-D-17-0131.1, 2018a. a
Whiteman, C. D., Lehner, M., Hoch, S. W., Adler, B., Kalthoff, N., Vogt, R., Feigenwinter, I., Haiden, T., and Hills, M. O.: The nocturnal evolution of atmospheric structure in a basin as a larger-scale katabatic flow is lifted over its rim, J. Appl. Meteorol. Clim., 57, 969–989, https://doi.org/10.1175/JAMC-D-17-0156.1, 2018b. a
Wildmann, N., Kigle, S., and Gerz, T.: Coplanar lidar measurement of a single wind energy converter wake in distinct atmospheric stability regimes at the Perdigão 2017 experiment, J. Phys. Conf. Ser., 1037, 052006, https://doi.org/10.1088/1742-6596/1037/5/052006, 2018. a, b
Wildmann, N., Bodini, N., Lundquist, J. K., Bariteau, L., and Wagner, J.: Estimation of turbulence dissipation rate from Doppler wind lidars and in situ instrumentation for the Perdigão 2017 campaign, Atmos. Meas. Tech., 12, 6401–6423, https://doi.org/10.5194/amt-12-6401-2019, 2019. a, b, c
Wildmann, N., Gerz, T., and Lundquist, J. K.: Long-range Doppler lidar measurements of wind turbine wakes and their interaction with turbulent atmospheric boundary-layer flow at Perdigao 2017, J. Phys. Conf. Ser., 1618, 032034, https://doi.org/10.1088/1742-6596/1618/3/032034, 2020. a
Wittkamp, N., Adler, B., Kalthoff, N., and Kiseleva, O.: Mesoscale wind patterns over the complex urban terrain around Stuttgart investigated with dual-Doppler lidar profiles, Meteorol. Z., 30, 185, https://doi.org/10.1127/metz/2020/1029, 2021. a
Wulfmeyer, V., Muppa, S. K., Behrendt, A., Hammann, E., Späth, F., Sorbjan, Z., Turner, D. D., and Hardesty, R. M.: Determination of convective boundary layer entrainment fluxes, dissipation rates, and the molecular destruction of variances: Theoretical description and a strategy for its confirmation with a novel lidar system synergy, J. Atmos. Sci., 73, 667–692, https://doi.org/10.1175/JAS-D-14-0392.1, 2016. a, b
Zängl, G.: A reexamination of the valley wind system in the Alpine Inn Valley with numerical simulations, Meteorol. Atmos. Phys., 87, 241–256, https://doi.org/10.1007/s00703-003-0056-5, 2004. a
Zängl, G.: The impact of weak synoptic forcing on the valley-wind circulation in the Alpine Inn Valley, Meteorol. Atmos. Phys., 105, 37–53, https://doi.org/10.1007/s00703-009-0030-y, 2009. a, b
Zardi, D. and Whiteman, C. D.: Diurnal mountain wind systems, in: Mountain weather research and forecasting, Springer, 35–119, https://doi.org/10.1007/s10546-014-9957-8, 2013. a, b
Short summary
Day-to-day weather over mountains remains a significant challenge in the domain of weather forecast. Using a combination of measurements from several instrument platforms, including Doppler lidars, aircraft, and radiosondes, we developed a method that relies primarily on turbulence characteristics of the lowest layers of the atmosphere. As a result, we identified new ways in which atmosphere behaves over mountains during daytime, which may serve to further improve forecasting capabilities.
Day-to-day weather over mountains remains a significant challenge in the domain of weather...
