Oxygen isotope data from snowpit at GISP2 Site 15

Data from shallow cores recov. over a 150x150 km grid in central Greenland. Dating of samples based on seasonal variation in oxygen isotope stratigraphy, along with measurements of gross beta activity. Age based on spline interpolation.中央格陵兰岛150x150公里网格区域浅层岩心数据的采集。样本年代测定基于氧同位素地层学的季节性变化，并辅以总β放射性的测量。年代计算采用样条插值法进行。