RMFRES RWU 4452 has made several ozone (O3) and carbon dioxide (CO2) trace gas flux measurements in the Snowy Range, WY GLEES research area over the past few years. These measurements were made using the micrometeorological eddy correlation technique at two sites: one 6 m above tree canopy height on the Brooklyn tower (ozone only); and the other below canopy height, 1-2m above a wet alpine meadow surface near the Brooklyn tower. Diel C02 vertical flux cycles change dramatically from expected daytime uptake (downward) and nighttime emissions (upward) during the growing season to predominantly upward during winter above the snow surface. Diel O3 vertical flux cycles above the tree canopy vary from normal deposition during the summer growing season to upward in the presence of snow cover. Diel O3 vertical flux cycles above the wet meadow are downward (deposition) as expected year round, however wintertime deposition measured above 1-2m snow depths are significantly smaller than fluxes measured above snow cover reported in the literature.