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Improvements in Sensible Heat-Flux Parametrization in the High-Resolution Regional Model (HRM) Through the Modified Treatment of the Roughness Length for Heat

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We discuss the impact of the differential treatment of the roughness lengths for momentum and heat (\(z_{0\mathrm{m}}\) and \(z_{0\mathrm{h}}\)) in the flux parametrization scheme of the high-resolution regional model (HRM) for a heterogeneous terrain centred around Thiruvananthapuram, India (8.5°N, 76.9°E). The magnitudes of sensible heat flux (H) obtained from HRM simulations using the original parametrization scheme differed drastically from the concurrent in situ observations. With a view to improving the performance of this parametrization scheme, two distinct modifications are incorporated: (1) In the first method, a constant value of 100 is assigned to the \(z_{0\mathrm{m}}/z_{0\mathrm{h}}\) ratio; (2) and in the second approach, this ratio is treated as a function of time. Both these modifications in the HRM model showed significant improvements in the H simulations for Thiruvananthapuram and its adjoining regions. Results obtained from the present study provide a first-ever comparison of H simulations using the modified parametrization scheme in the HRM model with in situ observations for the Indian coastal region, and suggest a differential treatment of \(z_{0\mathrm{m}}\) and \(z_{0\mathrm{h}}\) in the flux parametrization scheme.

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  • Beljaars ACM, Holtslag AAM (1991) Flux parameterization over land surface for atmospheric models. J Appl Meteorol 30:327–341

    Article  Google Scholar 

  • Blumel K (2000) An approximate analytical solution of flux–profile relationships for the atmospheric surface layer with different momentum and heat roughness lengths. Boundary-Layer Meteorol 97:251–271

    Article  Google Scholar 

  • Brutsaert W (1975) The roughness length for water vapor sensible heat, and other scalars. J Atmos Sci 32:2028–2031. doi:10.1175/1520-0469

    Article  Google Scholar 

  • Chen F, Janjic Z, Mitchell K (1997) Impact of atmospheric surface-layer parameterizations in the new land-surface scheme of the NCEP mesoscale eta model. Boundary-Layer Meteorol 85:391–421

    Article  Google Scholar 

  • Garratt JR (1978) Flux–profile relationships above tall vegetation. Q J R Meteorol Soc 104:199–211

    Article  Google Scholar 

  • Garratt JR (1992) The atmospheric boundary layer. Cambridge University Press, Cambridge, UK, 316 pp

  • Garratt JR, Hicks BB (1973) Momentum, heat and water vapor transfer to and from natural and artificial surfaces. Q J R Meteorol Soc 99:680–685

    Article  Google Scholar 

  • Hignett P (1994) Roughness lengths for temperature and momentum over heterogeneous terrain. Boundary-Layer Meteorol 68:225–236

    Article  Google Scholar 

  • Hopwood WP (1995) Surface transfer of heat and momentum over an inhomogeneous vegetated land. Q J R Meteorol Soc 121:1549–1574

    Article  Google Scholar 

  • Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woollen J, Zhu Y, Chelliah M, Ebisuzaki W, Higgins W, Janowiak J, Mo KC, Ropelewski C, Wang J, Leetmaa A, Reynolds R, Jenne R, Joseph D (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteorol Soc 77(3):437–471

    Article  Google Scholar 

  • Kot SC, Song Y (1998) An improvement of the Louis scheme for the surface layer in an atmospheric modelling system. Boundary-Layer Meteorol 88:239–254

    Article  Google Scholar 

  • Louis JF (1979) A parametric model of vertical eddy fluxes in the atmosphere. Boundary-Layer Meteorol 17:187–202

    Article  Google Scholar 

  • Mahrt L (1996) The bulk aerodynamic formulation over heterogeneous surfaces. Boundary-Layer Meteorol 78:87–119

    Article  Google Scholar 

  • Majewski D, Liermann D, Prohl P, Ritter B, Buchhold M, Hanisch T, Paul G, Wergen DW, Baumgardner J (2002) The operational global icosahedral-hexagonal gridpoint model GME: description and high-resolution tests. Mon Weather Rev 130:319–333

    Article  Google Scholar 

  • Mellor GL, Yamada T (1974) A hierarchy of turbulence closure models for planetary boundary layers. J Atmos Sci 31:1791–1806

    Article  Google Scholar 

  • Ramachandran R, Mohanty UC, Pattanayak S, Mandal M, Rani SI (2006) Location specific forecast at Sriharikota during the launch of GSLV-01. Curr Sci 91(3):285–295

    Google Scholar 

  • Rani SI, Ramachandran R, Subrahamanyam DB, Alappattu DP, Kunhikrishnan P (2010) Characterization of sea/land breeze circulation along the west coast of Indian sub-continent during pre-monsoon season. Atmos Res 95:367–378. doi:10.1016/j.atmosres.2009.10.009

    Article  Google Scholar 

  • Renfrew IA, Moore GWK, Guest PS, Bumke K (2002) A comparison of surface layer and surface turbulent flux observations over the Labrador Sea with ECMWF analyses and NCEP reanalyses. J Phys Oceanogr 32:383–400

    Article  Google Scholar 

  • Subrahamanyam DB, Ramachandran R, Rani SI, Sijikumar S, Anurose TJ, Ghosh AK (2012) Location-specific weather predictions for Sriharikota (\(13.72^\circ \text{ N,}\,80.22^\circ \text{ E}\)) through numerical atmospheric models during satellite launch campaigns. Nat Hazards 61:893–910. doi: 10.1007/s11069-011-9942-1

    Article  Google Scholar 

  • Sun J (1999) Diurnal variations of thermal roughness height over a grassland. Boundary-Layer Meteorol 92:407–427

    Article  Google Scholar 

  • Van Den Hurk BJJM, Holtslag AAM (1997) On the bulk parameterization of surface fluxes for various conditions and parameter ranges. Boundary-Layer Meteorol 82:119–134

    Article  Google Scholar 

  • Verhoef A, De Bruin HAR, Van Den Hurk BJJM (1997) Some practical notes on the parameter kb\(^{-1}\) for sparse vegetation. J Appl Meteorol 36:560–571

    Article  Google Scholar 

  • Wang S, Ma Y (2011) Characteristics of land–atmosphere interaction parameters over the Tibetan plateau. J Hydrometeorol 12:702–708

    Article  Google Scholar 

  • Yang R (2003) Determination of roughness lengths for heat and momentum over boreal forests. Boundary-Layer Meteorol 107:581–603

    Article  Google Scholar 

  • Yang K, Koike T, Fuji H, Tamagawa K, Hirose N (2002) Improvement of surface flux parametrization with a turbulence-related length. Q J R Meteorol Soc 128:2073–2087

    Article  Google Scholar 

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We express our sincere gratitude to Dr. Detlev Majewski and his colleagues from Deutscher Wetterdienst, Germany for their continuous support in setting up of the HRM model at SPL, VSSC and for providing the initial and lateral boundary conditions for the study period. We also thank Dr. K. Krishnamoorthy, Director, SPL and Dr. Radhika Ramachandran, IIST for their consistent encouragement. One of the authors Ms. TJA is thankful to the Indian Space Research Organization for sponsoring a fellowship for her Ph.D. research work. We also acknowledge an anonymous reviewer whose suggestions and comments helped improve the contents of this research note. The NCEP (National Centre for Environmental Predictions)-Final analysis data for this study are from the Research Data Archive which is maintained by the Computational and Information Systems Laboratory at the National Center for Atmospheric Research (NCAR). NCAR is sponsored by the National Science Foundation.

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Correspondence to D. Bala Subrahamanyam.

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Anurose, T.J., Subrahamanyam, D.B. Improvements in Sensible Heat-Flux Parametrization in the High-Resolution Regional Model (HRM) Through the Modified Treatment of the Roughness Length for Heat. Boundary-Layer Meteorol 147, 569–578 (2013).

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