Dome Fuji Ice Core 340KYr (2500m) d18O Data

d18O data of the first Dome Fuji ice core (DF1) for 0-2500 m (340 kyr). Raw data were obtained from measurements of continuous 10-cm samples for 0-2300 m (~255 kyr), and of discontinuous 25-cm samples (25-cm gap between two samples) for 2300-2500 m, with uncertainty of 0.05 per mil. The data were put on DFO-2006 age scale and then averaged at 250 yr intervals (for 0-254.5 kyr b2k) and 500 yr intervals (for 254.5-339.5 kyr b2k, where raw data are discontinuous). The depth at the top of intervals was re-interpolated from the age. For plotting the data, use staircase (cityscape) function using 'Top age', or linear function using 'Center age'. Note that age is given in b2k (before AD 2000). See also temperature reconstruction based on this data and delta D data of the Dome Fuji core.