PYREX - A SUMMARY OF FINDINGS

About six years ago, the planned field experiment Pyrenean Experiment (PYREX) was presented in the Bulletin. After a successful field phase in October and November 1990, and much work to prepare a consistent da tabase, interpret the measurements, and compare model results with obs ervations, it is possible to present today a summary of scientific res ults. New insight has been obtained in the areas of mountain drag meas urement and interpretation, humidity measurement, boundary layer measu rement by lidar, the ability of mesoscale models to represent orograph ic flows, the roughness length of mountains, and parameterization of s ubgrid-scale gravity waves. The present paper summarizes these results and may be understood as an introduction to this unique dataset on or ographic flows. The authors believe that much interesting research can still be achieved with the PYREX data, which are accessible to any in terested scientist.