Summary Net CO 2 flux measurements conducted during the summer and winter of 1994–96 were scaled in space and time to provide estimates of net CO 2 exchange during the 1995–96 (9 May 1995–8 May 1996) annual cycle for the Kuparuk River Basin, a 9200 km 2 watershed located in NE Alaska. Net CO 2 flux was measured using dynamic chambers and eddy covariance in moist‐acidic, nonacidic, wet‐sedge, and shrub tundra, which comprise 95...