A set of continuous, high-resolution atmospheric radon (222Rn) concentration time series and radon soil flux measurements were acquired during the summer of 1990 at a micrometeorological tower site 13 km northwest of Schefferville, Quebec, Canada. The tower was located in a dry upland, open-canopy lichen-spruce woodland. For the period July 23 to August 1, 1990, the mean radon soil flux was 41.1¿4.8 Bq m-2 h-1. Radon surface flux from the two end-member forest floor cover types (lichen mat and bare soil) were 38.8¿5.1 and 61.8¿15.6 Bq m-2 h-1, respectively. Average total forest canopy resistances computed using a simple ''flux box'' model for radon exchange between the forest canopy and the overlying atmosphere range from 0.47¿0.24 s cm-1 to 2.65¿1.61 s cm-1 for daytime hours (0900--1700 LT) and from 3.44¿0.91 s cm-1 to 10.55¿7.16 s cm-1 for nighttime hours (2000--0600) for the period July 23 to August 6, 1990. Continuous radon profiling of canopy atmospheres is a suitable approach for determining rates of biosphere/atmosphere trace gas exchange for remote field sites where daily equipment maintenance is not possible.