Modeling the Diurnal Variation of Meteorological Variables within the Boundary Layer — Preliminary Comparison Results
A meteorological processor for use in dispersion analyses is currently under development. The processor will be constructed using as a guide the methods outlined by two workgroups (Irwin, 1983; Holtslag et al., 1985). Various techniques for assessing the performance of the meteorological processor are being investigated. One such technique is to average the data by hour of day to produce time-height cross sections, depicting the average diurnal patterns within the data. This was done for the Wangara data (Clarke, 1974) using the 40-day series of hourly observations for comparison with modeling results from several boundary layer models. Sharp changes in time and space are smeared by such a procedure. However, such averaged data can be very useful for first assessment of the trends evident within a set of data. The purpose of this discussion is to summarize the results gained thus far through the use of such diurnal analyses of data.
KeywordsWind Speed Potential Temperature Diurnal Pattern National Weather Service Inversion Strength
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- Anthes, R.A., 1978: Boundary layers in numerical weather prediction. In: Workshop on the Planetary Boundary Layer. (Edited by J.C. Wyngaard). American Meteorological Society, Boston, MA, 326 pp.Google Scholar
- Clarke, R. H., 1974: Attempts to simulate the diurnal course of meteorological variables in the boundary layer. Izv., Atmospheric and Oceanic Physics.10, 600–612.Google Scholar
- Deardorff, J. W., 1974: Three-dimensional numerical study of the height and mean structure of a heated planetary boundary layer. Bound.-Layer Meteor., 7, 81–106.Google Scholar
- Holtslag, A. A. M., and A. P. van Ulden, 1982: Simple estimates of nighttime surface fluxes from routine weather data. K.N.M.I. Wetenschappelijk Rapport 82–4, De Bilt, Nederland, 22 pp.Google Scholar
- Holtslag, A. A. M., S. E. Gryning, J. S. Irwin and B. Siversten, 1985: Parameterization of the atmospheric boundary layer for air pollution dispersion models. 15th NATO/CCMS ITM, St. Louis, MO.Google Scholar
- Irwin, J. S., 1983: Preparing meteorological data for use in routine dispersion calculations — workgroup summary report. NOAA TM ERL ARL — 122. Air Resources Laboratory. Rockville, MD., 20 pp.Google Scholar
- Lettau, H.H. 1967: Small to large-scale features of boundary layer structure over mountain slopes. In: Proceedings of the Symposium on Mountain Meteorology. (Edited by E.R. Reiter and J.L. Rasmussen). Atmospheric Science Paper No. 122, Department of Atmospheric Science, Colorado State University, Fort Collins, CO, 131 p.Google Scholar