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Impact of Mountainous Topography on Surface-Layer Parameters During Weak Mean-Flow Conditions

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Abstract

We investigate surface-layer characteristics over a mountainous ridge in the Central Himalayas, utilizing tower-based fast-response micrometeorological observations (at 12 and 27 m above ground level) for the winter months November 2013–January 2014. During this period, the site generally experienced clear skies and weak synoptic flow (wind speed < 2 m s−1), favouring a strong diurnal evolution of the atmospheric boundary layer. The observations show a regular change in wind direction from north-easterly during the night-time to westerly during the daytime throughout the season, indicating the systematic development of a mountain circulation due to changes in heating of the mountain slopes as the day advances. Considering the variations in wind direction and topography of the site, the tilt corrections are implemented sector-wise by segregating the data into three sectors, thus estimating three sets of coefficients for the tilt correction. Observations during fair-weather conditions (59 days only) are analyzed with the sensible heat flux (H) showing large diurnal variations, which are in-phase with the mean vertical velocity. The afternoon peak value of H is found to be ≈ 116 ± 80 W m−2. In contrast, diurnal variations of momentum flux and turbulent kinetic energy are less prominent with rather weak maxima occurring between 0900 and 1300 IST, the period when wind direction changes over the ridge. Variations of the dimensionless standard deviations of the vertical velocity component and temperature are found to scale with the stability parameter z/L under convective conditions, while taking into account the effect of self-correlation. The constancy of fluxes with height, slope-flow buoyancy and stress divergence are also analyzed to provide a rigorous evaluation of Monin–Obukhov similarity theory based on two-level turbulence measurements.

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References

  • Aubinet M, Vesala T, Papale D (eds) (2012) Eddy covariance: a practical guide to measurement and data analysis. Springer, Dordrecht

    Google Scholar 

  • Bendat JS, Piersol AG (2000) Random data: analysis and measurement procedures, 3rd edn. Wiley, New York

    Google Scholar 

  • De Wekker SFJ, Kossmann M (2015) Convective boundary layer heights over mountainous terrain—a review of concepts. Front Earth Sci 3:77. https://doi.org/10.3389/feart.2015.00077

    Article  Google Scholar 

  • Foken T, Wichura B (1996) Tools for quality assessment of surface-based flux measurements. Agric For Meteorol 78:83–105

    Article  Google Scholar 

  • Gautam R, Hsu NC, Kafatos M, Tsay SC (2007) Influences of winter haze on fog/low cloud over the Indo-Gangetic plains. J Geophys Res 112:D05207. https://doi.org/10.1029/2005JD007036

    Article  Google Scholar 

  • Klipp CL, Mahrt L (2004) Flux–gradient relationship, self-correlation and intermittency in the stable boundary layer. Q J R Meteorol Soc 130:2087–2103

    Article  Google Scholar 

  • Kossmann M, Corsmeier U, DeWekker SFJ, Fiedler F, Vögtlin R, Kalthoff N, Güsten H, Neininger B (1999) Observations of handover processes between the atmospheric boundary layer and the free troposphere over mountainous terrain. Contrib Atmos Phys 72:329–350

    Google Scholar 

  • Mahrt L (1998) Stratified atmospheric boundary layers and breakdown of models. Theor Comput Fluid Dyn 11:263–279

    Article  Google Scholar 

  • Mahrt L (1999) Stratified atmospheric boundary layers. Boundary-Layer Meteorol 90:375–396

    Article  Google Scholar 

  • Mahrt L (2017) Directional shear in the nocturnal atmospheric surface layer. Boundary-Layer Meteorol 165:1. https://doi.org/10.1007/s10546-017-0270-1

    Article  Google Scholar 

  • Martins CA, Moraes OLL, Acevedo OC, Degrazia GA (2009) Turbulence intensity parameters over a very complex terrain. Boundary-Layer Meteorol 133:35–45

    Article  Google Scholar 

  • Meybeck M, Green P, Vörösmarty CJ (2001) A new typology for mountains and other relief classes: an application to global continental water resources and population distribution. Mt Res Dev 21:34–45. https://doi.org/10.1659/0276-4741(2001)021%5b0034:antfma%5d2.0.co;2

    Article  Google Scholar 

  • Moraes OLL, Acevedo OC, Degrazia GA, Anfossi D, da Silva R, Anabor V (2005) Surface layer turbulence parameters over a complex terrain. Atmos Environ 39:3103–3112

    Article  Google Scholar 

  • Nadeau DF, Pardyjak ER, Higgins CW, Parlange MB (2013) Similarity scaling over a steep alpine slope. Boundary-Layer Meteorol 147:401–419. https://doi.org/10.1007/s10546-012-9787-5

    Article  Google Scholar 

  • Oldroyd HJ, Pardyjak E, Huwald H, Parlange MB (2016) Adapting tilt corrections and the governing flow equations for steep, fully three-dimensional, mountainous terrain. Boundary-Layer Meteorol 159(3):539–565

    Article  Google Scholar 

  • Panofsky HA, Dutton JA (1984) Atmospheric turbulence. Wiley, New York

    Google Scholar 

  • Papadopoulos KH, Helmis CG (1999) Evening and morning transition of katabatic flows. Boundary-Layer Meteorol 92:195–227

    Article  Google Scholar 

  • Rotach MW, Zardi D (2007) On the boundary-layer structure over highly complex terrain: key findings from MAP. Q J R Meteorol Soc 133:937–948. https://doi.org/10.1002/qj.71

    Article  Google Scholar 

  • Rotach MW, Gohm A, Lang MN, Leukauf D, Stiperski I, Wagner JS (2015) 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

    Article  Google Scholar 

  • Serafin S, Adler B, Cuxart J, De Wekker SFJ, Gohm A, Grisogono B, Kalthoff N, Kirshbaum DJ, Rotach MW, Schmidli J, Stiperski I, Večenaj Ž, Zardi D (2018) Exchange processes in the atmospheric boundary layer over mountainous terrain. Atmosphere 9:102

    Article  Google Scholar 

  • Singh N, Solanki R, Ojha N, Janssen RHH, Pozzer A, Dhaka SK (2016) Boundary layer evolution over the central Himalayas from radio wind profiler and model simulations. Atmos Chem Phys 16:10559–10572. https://doi.org/10.5194/acp-16-10559-2016

    Article  Google Scholar 

  • Solanki R, Singh N (2014) LiDAR observations of the vertical distribution of aerosols in free troposphere: comparison with CALIPSO level-2 data over the central Himalayas. Atmos Environ 99:227–238

    Article  Google Scholar 

  • Solanki R, Singh N, Kiran Kumar NVP, Rajeev K, Dhaka SK (2016) Time variability of surface-layer characteristics over a mountain ridge in the central Himalayas during the spring season. Boundary-Layer Meteorol 158:453–471

    Article  Google Scholar 

  • Staebler RM, Fitzjarrald DR (2005) Measuring canopy structure and the kinematics of subcanopy flows in two forests. J Appl Meteorol 44:1161–1179

    Article  Google Scholar 

  • Stull RB (1988) An introduction to boundary-layer meteorology. Kluwer, Dordrecht

    Book  Google Scholar 

  • Tiwari PC, Joshi B (1997) Wildlife in the Himalayan foothills: conservation and management. Indus Publishing Company, New Delhi

    Google Scholar 

  • Trini Castelli S, Falabino S, Mortarini L, Ferrero E, Richiardone R, Anfossi D (2014) Experimental investigation of the surface layer parameters in low wind conditions in a suburban area. Q J R Meteorol Soc 140:2023–2036

    Article  Google Scholar 

  • Wilczak JM, Oncley SP, Stage SA (2001) Sonic anemometer tilt correction algorithms. Boundary-Layer Meteorol 99:127–150

    Article  Google Scholar 

  • Yuan R, Kang M, Park S, Hong J, Lee D, Kim J (2007) The effect of coordinate rotation on the eddy covariance flux estimation in a hilly Koflux forest site. Korean J Agric For Meteorol 9:100–108

    Article  Google Scholar 

  • Yuan R, Kang M, Park SB, Hong J, Lee D, Kim J (2011) Expansion of the planar-fit method to estimate flux over complex terrain. Meteorol Atmos Phys 110:123–133. https://doi.org/10.1007/s00703-010-0113-9

    Article  Google Scholar 

  • Zardi D, Whiteman CD (2013) Diurnal mountain wind systems. In: Chow FK, De Wekker SFJ, Snyder BJ (eds) Mountain weather research and forecasting. Springer, New York, pp 35–119

    Chapter  Google Scholar 

  • Zhong S, Whiteman CD (2008) Downslope flows on a low-angle slope and their interactions with valley inversions. II. Numerical modeling. J Appl Meteorol Climatol 47:2039–2057

    Article  Google Scholar 

Download references

Acknowledgements

This work has been carried out as part of IGBP-NOBLE project. We thank the Director, ARIES Nainital; Director SPL, and Project Director, ISRO-IGBP for their valuable support. Raman Solanki is thankful to the Indian Space Research Organisation for sponsoring the Ph.D. research fellowship. We also wish to thank the anonymous reviewers for their constructive comments and suggestions.

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  1. Raman Solanki

    Present address: Atmospheric Research Unit (ARU), National Astronomical Research Institute of Thailand (NARIT), Chiang Mai, Thailand

Authors and Affiliations

  1. Aryabhatta Research Institute of Observational Sciences, Nainital, India

    Raman Solanki & Narendra Singh

  2. Department of Physics and Astrophysics, University of Delhi, Delhi, India

    Raman Solanki

  3. Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram, India

    N. V. P. Kiran Kumar & K. Rajeev

  4. Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan

    Ryoichi Imasu

  5. Radio and Atmospheric Physics Lab, Rajdhani College, University of Delhi, New Delhi, India

    S. K. Dhaka

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  1. Raman Solanki
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  2. Narendra Singh
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  3. N. V. P. Kiran Kumar
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  4. K. Rajeev
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  5. Ryoichi Imasu
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  6. S. K. Dhaka
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Correspondence to Narendra Singh.

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Solanki, R., Singh, N., Kiran Kumar, N.V.P. et al. Impact of Mountainous Topography on Surface-Layer Parameters During Weak Mean-Flow Conditions. Boundary-Layer Meteorol 172, 133–148 (2019). https://doi.org/10.1007/s10546-019-00438-3

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