Boundary-Layer Meteorology

, Volume 89, Issue 3, pp 385–405 | Cite as

The Kwinana Coastal Fumigation Study: II – Growth of the Thermal Internal Boundary Layer

  • A. K. Luhar
  • B. L. Sawford
  • J. M. Hacker
  • K. N. Rayner


Aircraft measurements of potential temperature and turbulent kinetic energy are used to examine the growth of the thermal internal boundary layer (TIBL) in sea-breeze flows on four selected days of a coastal fumigation study performed in 1995 at Kwinana in Western Australia. The aircraft data, together with radiosonde measurements taken on the same days, show a multi-layered low-level onshore flow in the vertical with a superadiabatic layer extending to about 50 m above the water surface on all four days. On the first three days the layer above the superadiabatic layer was neutral, typically 200 m deep, capped by a stably stratified region, whereas on the remaining day it was fully stable. The occurrence of the neutral layer on most experimental days contrasts with the more usual situation involving an entirely stable onshore flow. A composite approach based on both temperature and turbulence data is used to provide a pragmatic but self-consistent definition of the TIBL height. The data for the first three days indicate that the TIBL grows rapidly into the neutrally stratified region to the top of the region within about 2 km from the coast, with a very slow subsequent growth into the stable stratification aloft. On the other hand, the TIBL grows only to about 200 m within a distance of 7 km from the coast on the fourth day due to a strong stable stratification.

An existing numerical TIBL model based on the slab approach, capable of describing the TIBL growth in both neutral and stable environments, and a recent analytical model, more efficient for operational use, are used to simulate the aircraft TIBL observations. The predictions by both models agree reasonably well with the data.

Aircraft measurements Atmospheric dispersion Coastal meteorology Sea breeze Shoreline fumigation Slab model 


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  1. Driedonks, A. G. M.: 1982, 'Sensitivity Analysis of the Equations for a Convective Mixed Layer', Boundary-Layer Meteorol. 22, 475–480.Google Scholar
  2. EPA: 1992, 'Kwinana TIBL Experiments 1991', Internal Report, Environmental Protection Authority of Western Australia, Perth, 28 pp.Google Scholar
  3. Fritts, T. W., Starheim, F. J., and Deihl, B. J.: 1980, 'A Formulation for Defining the Development of the Thermal Internal Boundary Layer (TIBL) in Sea Breeze Flows', in Second Conference on Coastal Meteorology, American Meteorological Society, Boston, pp. 147–151.Google Scholar
  4. Gamo, M., Yamamoto, S., and Yokoyama, O.: 1982, 'Airborne Measurements of the Free Convective Internal Boundary Layer During the Sea Breeze', J. Meteorol. Soc. Japan 60, 1284–1298.Google Scholar
  5. Garratt, J. R.: 1990, 'The Internal Boundary Layer – A Review', Boundary-Layer Meteorol. 50, 171–203.Google Scholar
  6. Gryning, S. E. and Batchvarova, E.: 1990, 'Analytical Model for the Growth of the Coastal Internal Boundary Layer During Onshore Flow', Quart. J. Roy. Meteorol. Soc. 116, 187–203.Google Scholar
  7. Källstrand, B. and Smedman, A.-S.: 1997, 'A Case Study of the Near-Neutral Coastal Internal Boundary-Layer Growth: Aircraft Measurements Compared with Different Model Estimates', Boundary-Layer Meteorol. 85, 1–33.Google Scholar
  8. Kerman, B. R., Mickle, R. E., Portelli, R. V., Trivett, N. B., and Misra, P. K.: 1982, 'The Nanticoke Shoreline Diffusion Experiment, June 1978: II Internal Boundary Layer Structure', Atmos. Environ. 16, 423–437.Google Scholar
  9. Luhar, A. K.: 1998, 'An Analytical Slab Model for the Growth of the Coastal Thermal Internal Boundary Layer Under Near-Neutral Onshore Flow Conditions', Boundary-Layer Meteorol. 88, 103–120.Google Scholar
  10. Luhar, A. K. and Sawford, B. L.: 1996, 'An Examination of Existing Shoreline Fumigation Models and Formulation of an Improved Model', Atmos. Environ. 30, 609–620.Google Scholar
  11. Lyons, W. A.: 1975 'Turbulent Diffusion and Pollutant Transport in Shoreline Environments', in Lectures on Air Pollution and Environmental Impact Analyses, American Meteorological Society, Boston, pp. 136–208.Google Scholar
  12. Lyons, W. A. and Cole, H. S.: 1973 'Fumigation and Plume Trapping on the Shores of Lake Michigan During Stable Onshore Flow', J. Appl. Meteorol. 12, 494–510.Google Scholar
  13. Portelli, R. V.: 1982, 'The Nanticoke Shoreline Diffusion Experiment, June, 1978–I: Experimental Design and Program Overview', Atmos. Environ. 16, 413–421.Google Scholar
  14. Rayner, K. N.: 1987, 'Dispersion of Atmospheric Pollutants from Point Sources in a Coastal Environment', Ph.D. Thesis. Murdoch University, Australia, pp. 249.Google Scholar
  15. Rayner, K. N., Bell, B. P., and Watson, I. D.: 1990, 'Coastal Internal Boundary Layers and Chimney Plume Dispersion', Preprints, in International Clean Air Conference, Clean Air Society of Australia and New Zealand, Auckland, pp. 151–158.Google Scholar
  16. Rayner, K. N. and Watson, I. D.: 1991, 'Operational Prediction of Daytime Mixed Layer Heights for Dispersion Modelling', Atmos. Environ. 25A, 1427–1436.Google Scholar
  17. Raynor, G. S., SethuRaman, S., and Brown, R. M.: 1979, 'Formation and Characteristics of Coastal Internal Boundary Layers During Onshore Flows', Boundary-Layer Meteorol. 16, 487–514.Google Scholar
  18. Sawford, B. L., Luhar, A. K., Hacker, J. M., Young, S. A., Yoon, I.-H., Noonan, J. A., Carras, J. N., Williams, D. J., and Rayner, K. N.: 1998, 'The Kwinana Coastal Fumigation Study: I – Program Overview, Experimental Design and Selected Results', Boundary-Layer Meteorol. 89, 359–384.Google Scholar
  19. Sawford, B. L., Luhar, A. K., Noonan, J. A., Yoon, I.-H., Young, S. A., Physick, W. L., Patterson, G.R., Hacker, J. M., Carras, J. N., Williams, D. J., and Blockley, A.: 1996, 'Shoreline Fumigation at Kwinana: A Study to Assess, Validate and Improve DISPMOD', Final Report SB/1/227, CSIRO Division of Atmospheric Research, Aspendale, Australia, 323 pp.Google Scholar
  20. Shao, Y., Hacker, J. M., and Schwerdtfeger, P.: 1991, 'The Structure of Turbulence in a Coastal Atmospheric Boundary Layer', Quart. J. Roy. Meteorol. Soc., 117, 1299–1324.Google Scholar
  21. Stunder, M. J. and SethuRaman, S.: 1985, 'A Comparative Evaluation of the Coastal Internal Boundary Layer Height', Boundary-Layer Meteorol. 32, 177–204.Google Scholar
  22. Stunder, M. J. and SethuRaman, S.: 1986, 'A Statistical Evaluation and Comparison of Coastal Point Source Dispersion Models', Atmos. Environ. 20, 301–315.Google Scholar
  23. Venkatram, A.: 1977, 'A Model of Internal Boundary Layer Development', Boundary-Layer Meteorol. 11, 419–437.Google Scholar
  24. Zilitinkevich, S. S.: 1975, 'Comments on “A Model for the Dynamics of the Inversion above a Convective Boundary Layer”’, J. Atmos. Sci. 32, 991–992.Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • A. K. Luhar
  • B. L. Sawford
  • J. M. Hacker
  • K. N. Rayner

There are no affiliations available

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