The exchange of reduced sulfur gases between the atmosphere and forest soils in the Shaver Hollow watershed (Shenandoah National Park, Virgina) were measured with sulfur-free and ambient air enclosures at least twice a month from March through November 1989. Soils within sulfur-free enclosures were sources of carbonyl sulfide (COS) and carbon disulfide (CS2). Atmospheric fluxes of COS and CS2 ranged from 0.77 to 13.03 ng COS-S/m2-min and from 2.04 to 15.74 ng CS2-S/m2-min. In contrast, soils within ambient air enclosures were sinks for COS and CS2. Uptake rates of COS and CS2 ranged from 2.78 to 16.20 ng COS-S/m2-min and from 3.42 to 26.62 ng CS2-S/m2-min. The discrepancy in the direction of these fluxes was caused by the flux measurement techniques. ¿ American Geophysical Union 1991