METEOROLOGICAL OVERVIEW OF THE 1993 OH PHOTOCHEMISTRY EXPERIMENT

Meteorological data from three weather stations in the Fritz Peak regi on of the Colorado Front Range are presented to aid in the interpretat ion of photochemical results from the tropospheric OH Photochemistry E xperiment. The field site, its surrounding topography, and pollution s ources are described. Meteorological data show a transition during the campaign from the summer into the fall season, marked by decreasing t emperatures and cloud cover, along with increasing wind speeds and wes terly flow. Mountainous terrain significantly influences the meteorolo gy over the site and thereby complicates the comparisons of chemical m easurements. The meteorological data suggest that an appropriate time to make comparisons between measurement techniques is under conditions of strong westerly airflow, though synchronous upslope wind events sh ould not be excluded.