Relationship Between the Momentum and Scalar Fluxes Close to the Ground During the Indian Post-monsoon Period

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• 作者：Subharthi Chowdhuri (1)
  Thara V. Prabha (1)
  Anand Karipot (2)
  T. Dharamraj (1)
  M. N. Patil (1)
  
  1. Indian Institute Of Tropical Meteorology ; Dr Homi Bhaba Road ; Pashan ; Pune ; 411008 ; India
  2. Department of Atmospheric and Space Sciences ; Savitribai Phule Pune University ; Pune ; India
  
• 关键词：Convective boundary layer ; Cospectral analysis ; Monsoon boundary layer ; Quadrant analysis ; Reynolds analogy
• 刊名：Boundary-Layer Meteorology
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：154
• 期：2
• 页码：333-348
• 全文大小：586 KB
• 参考文献：1. Betchov R, Yaglom AM (1971) Comments on the theory of similarity as applied to turbulence in an unstably stratified fluids. Izv. Akad. Nauk SSSR, Ser. Fiz. Atmosf. i Okeana 7: 1270鈥?279 (829鈥?32 in the Engl. transl. of the journal)
  2. Cava D, Giostra U, Siqueira MBB, Katul GG (2004) Organised motion and radiative perturbations in the nocturnal canopy sublayer above an even-aged pine forest. Bound Layer Meteorol 112:129鈥?57 w window">CrossRef
  3. Chandra K (1938) Instability of fluids heated from below. Proc R Soc A 164:231鈥?42
  4. Hinze JO (1959) Turbulence. McGraw-Hill, New York, 586 pp
  5. Kader BA, Yaglom AM (1990) Mean fields and fluctuation moments in unstably stratified turbulent boundary layers. J Fluid Mech 212:637鈥?62 w window">CrossRef
  6. Kaimal JC, Wyngaard JC, Izumi Y, Cot茅 OR (1972) Spectral characteristics of surface-layer turbulence. Q J R Meteorol Soc 98:563鈥?89 w window">CrossRef
  7. Kaimal JC, Finnigan JJ (1994) Atmospheric boundary layer flows: their structure and measurement. Oxford University Press, New York, 289 pp
  8. Khanna S, Brasseur JG (1997) Three dimensional buoyancy and shear-induced local structure of the atmospheric boundary layer. J Atmos Sci 55:710鈥?43 w window">CrossRef
  9. Kulkarni JR, Maheskumar RS, Morwal SB, Konwar M, Deshpande CG, Joshi RR, Bhalwankar RV, Pandithurai G, Safai PD, Narkhedkar SG, Dani KK, Nath A, Sapre VV, Puranik PV, Kandalgaonkar S, Mujumdar VR, Khaladkar RM, Vijayakumar R, Prabha TV, Goswami BN (2012) The cloud aerosol interactions and precipitation enhancement experiment (CAIPEEX): overview and preliminary results. Curr Sci 102:413鈥?25
  10. Laubach J, McNaughton KG (2009) Scaling properties of temperature spectra and heat-flux cospectra in the surface friction layer beneath an unstable outer layer. Bound Layer Meteorol 133:219鈥?52 w window">CrossRef
  11. Lemone MA (1973) The structure and dynamics of horizontal roll vortices in the planetary boundary layer. J Atmos Sci 30:1077鈥?091 w window">CrossRef
  12. Li Dan, Bou-Zeid Elie (2011) Coherent structures and the dissimilarity of turbulent transport of momentum and scalars in the unstable atmospheric surface layer. Bound Layer Meteorol 140:243鈥?62 w window">CrossRef
  13. McNaughton KG, Clement RJ, Moncrieff JB (2007) Scaling properties of velocity and temperature spectra above the surface friction layer in a convective atmospheric boundary layer. Nonlinear Process Geophys 14:257鈥?71 w window">CrossRef
  14. Narasimha R, Kailas SV (1990) Turbulent bursts in the atmosphere. Atmos Environ 24A:1635鈥?645 w window">CrossRef
  15. Prabha TV, Khain A, Maheshkumar RS, Pandithurai G, Kulkarni JR, Konwar M, Goswami BN (2011) Microphysics of pre-monsoon and monsoon clouds as seen from in situ measurements during CAIPEEX. J Atmos Sci 68:1882鈥?901 w window">CrossRef
  16. Priestley CHB (1957) Convection from the Earth鈥檚 surface. Proc R Soc Lond 238:287鈥?04 w window">CrossRef
  17. Smedman A-S, H枚gstr枚m U, Hunt JCR, Sahl茅e E (2007) Heat/mass transfer in the slightly unstable atmospheric surface layer. Q J R Meteorol Soc 133:37鈥?1 w window">CrossRef
  18. Tennekes H, Lumley JL (1972) A first course in turbulence. The MIT Press, Cambridge, 300 pp
  19. Vickers D, Mahrt L (1997) Quality control and flux sampling problems for tower and aircraft data. J Atmos Ocean Technol 14:512鈥?26 w window">CrossRef
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Meteorology and Climatology
  Atmospheric Protection, Air Quality Control and Air Pollution
  
• 出版者：Springer Netherlands
• ISSN：1573-1472

文摘

Results of a comprehensive study of the characteristics of turbulent transport very close to the ground using micrometeorological eddy-covariance measurements from the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) Integrated Ground Observational Campaign (IGOC) conducted in 2011 at a rural site over the Indian peninsular region are presented. The dataset used in the present study pertains to the morning hours when the convective boundary layer is at its growing phase. A new method, very similar to the traditional quadrant analysis, is introduced to investigate the relationship between the scalar and momentum flux transports by projecting the scalar and momentum flux contours onto the \(u-w\) plane. Cospectral analysis is employed to study the scales of the transporting eddies; it was found that, during very unstable conditions, the scalar and momentum transports are poorly correlated with each other. However, for the near-neutral case, the correlation between the scalar and momentum transports becomes stronger, thus supporting the Reynolds analogy.