Final data and analysis report on: High-resolution in plume concentration fluctuations measurements using lidar remote sensing technique

The multi-nation, high-resolution field study of Meteorology and Diffusion over Non-uniform Areas (MADONA) was conducted by scientists from the United States, United Kingdom, Germany, Denmark, Sweden, and The Netherlands at Porton Down, Salisbury, Wiltshire, UK during September and October 1992. The host of the field study was the Chemical and Biological Defence Establishment at Porton Down.

MADONA was designed and conducted for high resolution meteorological data collection and diffusion experiments using smoke, sulphur hexafluoride (SF_6), and propylene gas during unstable, neutral, and stable atmospheric conditions in an effort to obtain terrain-influenced meteorological fields, dispersion, and concentration fluctuation measurements using specialized sensors and tracer generators.

Thirty-one days of meteorological data were collected during the period 7 September through 7 October and 27 diffusion experiments were conducted from 14 to 23 September 1992. Puffs and plumes of smoke and SF_6 were released simultaneously for most of the experiments to gauge the resultant diffusion and concentration behavior.

Simulations of airflow and diffusion over the MADONA topography were made with a variety of models. Wind fields and wind-related parameters were simulated with several high resolution wind flow models. A tally of the various data gathering activities indicates that the execution of MADONA was highly successful.

Preliminary use of the data sets is showing the high quality and depth of the MADONA data base. This well-documented data base is suitable for the evaluation and validation of short range/near field wind and diffusion models/codes. The data base has been placed on CD-ROM media in a structured way by CBDE, Porton Down. (au) 2 tabs., 17 ills., 7 refs..