Much of the boreal forest in interior Alaska is underlain with discontinuous permafrost, which is actively degrading due to climatic warming.  As permafrost thaws, old soil carbon is liberated and potentially lost from watersheds by a number of processes including hydrologic export.  Our research has focused on determining the coupling between permafrost thaw and stream export of dissolved inorganic carbon (DIC) from watersheds.  We used both stable isotopes of carbon and geochemical modeling to determine the contributions of soils versus carbonate weathering for producing DIC in a series of sub-catchments of the Caribou-Poker Creeks Research Watershed, which vary in the spatial extent of underlying permafrost.  Mean DIC concentration in streams varied from 359 to 754 µM.  The two modeling approaches produced estimates of the contributions of weathering and soil respiration to stream DIC that were in close agreement (r² = 0.79).  Across watersheds, soil respiration contributed an average of 2 to 24 % of the stream water DIC.  The greatest concentration of soil derived DIC was in streams draining watersheds with lower permafrost extents.  These results suggest that as permafrost thaws, soil carbon is exported from watersheds by stream flow and that hydrologic export will likely increase with continued warming.