The shallow core 18C was drilled to 110 m 36 km upstream from DYE-3. Position 65.03N 44.39W. The delta-18O data were all measured immediately after the 1984 drilling operation. The delta-18O data uncertainty is 0.1 per mil. The samples are cut to achieve an average resolution of 8 samples per year, i.e. the depth resolution increases with depth (as annual layers thin). All sample depths are for the bottom of each sample.