Advertisement

Advances in Atmospheric Sciences

, Volume 7, Issue 2, pp 197–210 | Cite as

A coupled dynamical-radiational model of stratocumulus

  • Ye Weizuo 
Article

Abstract

A model dealing with interactions between the air and low stratiform clouds is presented based on the mixed-layer model Lilly (1968) pioneered and on Deardorff's three dimensional numerical model results. Its main new aspects lie in 1) consideration of the natures of both the atmosphere and cloud; 2) a new entrainment velocity scheme with few arbitrary assumptions; 3) transition from one-mixed layer to two-mixed layer model; and 4) parameterization of radiation and precipitation calculations.

The model results for radiation, moisture, and heat turbulent fluxes turn out to be in good agreement with those calculated or observed by Kawa (1988), Nicholls (1984), and Schmets et al. (1981) in California, the North Sea, and the North Atlantic, respectively.

Basically, this paper furnishes the theoretical basis for a model to address questions concerning the time-evolution of thermodynamical profiles both in cloud and out of cloud. The applications of this model wil be in a separate paper.

Keywords

Mixed Layer Turbulent Flux Rainfall Rate Cloud Base Buoyancy Flux 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Deardorff, J.W., (1976), On the entrainment rate of a stratocumulus-topped mixed layer,Quart. J. Roy. Meteor. Soc.,102: 563–582.CrossRefGoogle Scholar
  2. —, (1980), Stratocumulus-capped mixed layers derived from a three-dimensional model,Boundary-layer Meteor.,18: 495–521.CrossRefGoogle Scholar
  3. Fravalo, C., Y. Fouqqart, and R. Rosset, (1981), The sensitivity of a model of low stratiform clouds to radiation,J. Atmos. Sci.,38: 1049–1062.CrossRefGoogle Scholar
  4. Griffith, K. T., S. K. Cox, and R. G. Knollenberg, (1980), Infrared radiative properties of tropical cirrus clouds inferred from aircraft measurements,J. Atmos. Sci.,37: 1077–1087.CrossRefGoogle Scholar
  5. Hanson, H. P., (1987), Parameterization of radiative flux profiles within layer clouds, Submitted toJ. of Climate and Applied Meteorology.Google Scholar
  6. Herman, G., and R. Goody, (1976), Formation and persistence of summertime arctic stratus clouds,J. Atmos. Sci.,33: 1538–1553.CrossRefGoogle Scholar
  7. Kawa, R., (1988), The chemistry and dynamics of marine stratocumulus, the Ph D thesis of Department of Atmospheric Sciences, Colorado State University, Fort Collins (200 pp).Google Scholar
  8. Lacis, A. A., and J. E. Hansen, (1974), A parameterization for the absorption of solar radiation in the earth's atmosphere,J. Atmos. Sci.,31: 118–133.CrossRefGoogle Scholar
  9. Lilly, D. K., (1968), Models of cloud-topped mixed layers under a strong inversion,Quart. J. Roy. Meteor. Soc.,94: 292–309.CrossRefGoogle Scholar
  10. Liou, K.-N., and G. D. Wittman, (1979), Parameterization of the radiative properties of cloud,J. Atmos. Sci.,36: 1261–1273.CrossRefGoogle Scholar
  11. Nicholls, S., (1984), The dynamics of stratocumulus: Aircraft observations and comparisons with a mixed layer model,Quart. J. Roy. Meteor. Soc.,110: 783–820.CrossRefGoogle Scholar
  12. Oliver, D. A., W. S. Lewellen, and G. G. Williamson, (1978), The interactions between turbulent and radiative transport in the development of fog and low level stratus,J. Atmos. Sci.,35: 301–316.Google Scholar
  13. Paltridge, G. W., (1974), Infrared emissivity, short-wave albedo and the microphysics of stratiform water clouds,J. Geophys. Res.,79: 4053–4065.CrossRefGoogle Scholar
  14. Ramanathan, V., (1976), Radiative transfer within the earth's troposphere and stratosphere: A simplified radiative-convective model,J. Atmos. Sci.,33: 1330–1346.CrossRefGoogle Scholar
  15. —, (1981), The role of ocean-atmosphere interactions in the CO2 climate problem,J. Atmos. Sci.,38: 918–930.CrossRefGoogle Scholar
  16. Schmets, J. E. Raschke, and H. Fimpel, (1981), Solar and thermal radiation in maritime stratocumulus clouds,Beitr. Phys. Atmosph.,54: 442–452.Google Scholar
  17. Stephens, G. A., (1978), Radiation profiles in extended water clouds I and II,J. Atmos. Sci.,35: 2111–2122.CrossRefGoogle Scholar
  18. —, S. Ackerman, and E. A. Smith, (1984), A shortwave parameterization vevised to improve cloud absorption,J. Atmos. Sci.,41: 2133–2141.Google Scholar

Copyright information

© Advances in Atmospheric Sciences 1990

Authors and Affiliations

  • Ye Weizuo 
    • 1
  1. 1.Institute of Atmospheric PhysicsAcademia Sinice.Beijing

Personalised recommendations